JP2006050678A - Imaging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform camera-shake corrections that are optimum, even for each of the arbitrary users and imaging situations in a video movie camera having a camera-shake correction mechanism. <P>SOLUTION: A camera-shake correction that is optimum for each user can be performed, by selecting a control-signal table by the user with a user selection means 12 from a plurality of control-signal tables stored in a storing means 11, depending on the feature of the camera shake of each user. Furthermore, by providing a means for reading a control-signal table that is optimum for each user and a software preparation means for preparing a control-signal table that is optimum for the user by analyzing the user's camera-shake frequency with a frequency analysis means, a camera-shake correction that is optimum, even for each of the arbitrary users can be performed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an image pickup apparatus equipped with a camera shake correction apparatus that performs camera shake correction, and more particularly to a camera shake correction apparatus for optimizing a camera shake correction apparatus according to a shooting state of a photographer and performing stable camera shake correction.

  In recent years, consumer video cameras (hereinafter referred to as “video movies”) have become smaller, lighter, and optical zooms have become more powerful, and their usability has improved dramatically. For this reason, a video movie has become an ordinary video device for general users. On the other hand, however, the reduction in size, weight, and high magnification of the optical zoom have caused video screen users who are not proficient in shooting to experience unstable screens when camera shake occurs. . Therefore, in order to reduce such troubles, many video movies equipped with a camera shake correction device have been developed and commercialized.

  As described in Japanese Patent Application Laid-Open No. 4-18515, a video movie camera shake correction apparatus corrects camera shake by a user by moving a correction lens group in two directions perpendicular to the optical axis, and is stable. A method for obtaining an image has been proposed.

  Such a conventional camera shake correction device was determined to be the best by the manufacturer of the video movie so that the camera shake correction device system is easy to use for an unspecified number of photographers (users). Usually it was set. A setting method of the camera shake correction apparatus will be described with reference to FIG.

FIG. 22 is a conceptual diagram showing the effect of camera shake correction on the camera shake frequency, where the horizontal axis represents the camera shake frequency (Hz) and the vertical axis represents the degree of suppression (dB). The degree of suppression on the vertical axis indicates how much the camera shake correction is effective for a predetermined frequency. That is, the lower the numerical value, the better the camera shake correction performance. In general, the hand shake frequency of the user is about 1 to 10 (Hz). However, since it is difficult to improve the hand shake correction performance for all frequencies, it is usual to improve the hand shake correction performance for a specific frequency. It is. Therefore, if the frequency of the user's camera shake is 5 (Hz), the characteristics of the camera shake correction device are optimized at the frequency 5 (Hz), the influence of the user's camera shake is removed, and a stable image is obtained. The manufacturer has set up the system for video movies in advance. That is, since the manufacturer has built a system for the camera shake correction device, an actual photographer cannot change the system or select a system suitable for him.
Japanese Patent Laid-Open No. 4-18515

  However, as described above, the camera shake frequency when shooting a video movie is normally about 1 to 10 (Hz). However, the current camera shake frequency varies from user to user. . For example, the frequency of camera shake varies greatly depending on gender, age, the size of a user's hand holding a video movie, and the amount of holding force. Also, as shown in FIG. 21, the shape of video movie 1 is horizontal as shown in (a), and vertical as shown in (b). Is the current situation. Therefore, for example, if a user with a camera shake frequency of about 7 (Hz) is shot using a video movie that is set in advance so that the camera shake correction performance of 5 (Hz) is optimized by the manufacturer, it is optimal for that user. This causes a problem that the camera shake correction is not performed. That is, the camera shake correction effect is reduced, the image correction state becomes unnatural, and the user feels uncomfortable with the photographed image and the usability of the video movie is poor. In addition to the conventional movie shooting with a single video movie, models that still shoot still images have become common, but the shooting frequency differs between movie shooting and still image shooting. There is a problem that it is difficult to perform the optimum camera shake correction both at the time of shooting and at the time of still image shooting.

  In order to solve this problem, an image pickup apparatus according to claim 1 is an image pickup apparatus having an image pickup optical system, a motion detection unit that detects a movement of the image pickup apparatus due to camera shake and other vibrations, and the image pickup apparatus. Motion correction means for controlling the optical axis of the picked-up light disposed in the image pickup optical system to correct the movement of the picked-up image generated due to the movement of the image, and the motion correction means based on the output of the movement detection means. Control signal generating means for generating a control signal, storage means for storing a plurality of tables indicating the response characteristics of the motion correcting means for the output of the motion detecting means, and a table indicating the response characteristics of the storage means Selectable first table selecting means, wherein the control signal generating means changes the control signal in accordance with a table indicating the selected response characteristic. . This allows the user to select a table showing the response characteristics of the image stabilization device and easily construct a system that matches the frequency of the user's image stabilization, so that anyone can obtain a stable image during shooting. it can.

  According to a second aspect of the present invention, there is provided the imaging apparatus according to the first aspect, wherein a display unit that displays a captured image, a detection unit that detects whether or not the display unit is used, and whether or not the display unit is used. Storage means for storing a plurality of tables indicating the response characteristics of the motion correction means, and second table selection means for selecting a table indicating the response characteristics of the storage means according to the output value of the detection means, The control signal is changed in accordance with a table indicating the selected response characteristic. As a result, even if the shooting posture becomes unstable due to the user using the display device, it is possible to select a table showing the response characteristics of the image stabilization device in accordance with the shooting posture, so that anyone can stabilize the shooting. An image can be obtained.

The imaging apparatus according to claim 3 is the imaging apparatus according to claim 1 or 2, wherein the imaging apparatus has a moving image shooting mode and a still image shooting mode, and switches between the moving image shooting mode and the still image mode. Storage means for storing a plurality of tables indicating response characteristics of the motion correction means corresponding to the moving image shooting mode and the still image shooting mode; and a table indicating the response characteristics of the storage means based on the output of the first switching means. And a third table selecting means for selecting, wherein the control signal is changed in accordance with the table indicating the selected response characteristic. Accordingly, when shooting a moving image or a still image, a table showing the response characteristics of the camera shake correction device in accordance with each shooting mode can be selected, so that anyone can obtain a stable image at the time of shooting.
The imaging apparatus according to claim 4 is the imaging apparatus according to claim 1, 2, or 3, wherein the imaging apparatus has an optical zoom mode and an electronic zoom mode, and switches between the optical zoom mode and the electronic zoom mode. A switching means, a storage means for storing a plurality of tables indicating response characteristics of the motion correction means corresponding to the optical zoom mode and the electronic zoom mode, and a response characteristic of the storage means based on the output of the second switching means. 4th table selection means which selects a table, The said control signal is changed according to the table which shows the said selected response characteristic, It is characterized by the above-mentioned. As a result, when shooting using the optical zoom or electronic zoom function, a table showing the response characteristics of the camera shake correction device for each shooting mode can be selected, so anyone can obtain a stable image during shooting. Can do.

  The imaging device according to claim 5 is an imaging device having an imaging optical system, and is generated due to motion detection means for detecting motion of the imaging device due to camera shake and other vibrations, and movement of the imaging device. A motion correction unit disposed in the imaging optical system for controlling the optical axis of the imaging light to correct the motion of the captured image, and a control signal is generated for the motion correction unit based on the output of the motion detection unit A control signal generating means; a reading means for reading a table indicating response characteristics of the motion correcting means with respect to an output of the motion detecting means; and a storage means for storing a table indicating the response characteristics. The means changes the control signal in accordance with a table indicating response characteristics of the storage means. As a result, the user can rewrite the system of the camera shake correction device and easily construct a system that matches the frequency of the camera shake of the user, so that anyone can obtain a stable image during shooting.

  An imaging apparatus according to a sixth aspect is the imaging apparatus according to the fifth aspect, wherein a table indicating a plurality of response characteristics is stored in the storage means, and a table indicating the response characteristics of the storage means can be arbitrarily selected. Table selection means is provided. As a result, even if multiple users use a single video movie, a system that matches the frequency of each user's camera shake can be easily constructed, so anyone can obtain a stable image during shooting. Can do.

  The imaging apparatus according to claim 7 is an imaging apparatus having an imaging optical system, and is generated due to motion detection means for detecting motion of the imaging apparatus due to camera shake and other vibrations, and movement of the imaging apparatus. A motion correction unit disposed in the imaging optical system for controlling the optical axis of the imaging light to correct the motion of the captured image, and a control signal is generated for the motion correction unit based on the output of the motion detection unit Software creation for creating a control signal generating means, a frequency analyzing means for analyzing the frequency detected by the motion detecting means, and a table showing response characteristics of the motion correcting means according to the frequency analyzed by the frequency analyzing means And a storage means for storing a table indicating the response characteristics, wherein the control signal generating means changes the control signal according to the output of the storage means. And wherein the Rukoto. As a result, the user's camera shake frequency can be analyzed instantaneously when the video movie is used, and a system matched to the user's camera shake frequency can be easily constructed, so that anyone can obtain a stable image during shooting.

The imaging apparatus according to claim 8 is the imaging apparatus according to claim 7, wherein a table indicating a plurality of response characteristics is stored in the storage means, and a table indicating the response characteristics of the storage means can be arbitrarily selected. It is provided with. As a result, even if multiple users use a single video movie, a system that matches the frequency of each user's camera shake can be easily constructed, so anyone can obtain a stable image during shooting. Can do.
Therefore, it is possible to create a control signal table with higher accuracy.

  As described above, according to the imaging device of the first aspect, the user can select the control signal table adjusted according to his / her camera shake frequency and use the video movie. A stable image can be obtained easily. In addition, even when one video movie is used by multiple users, each user can select and use the optimal control signal table, so the system must be adjusted to match each user's camera shake frequency. Can do.

  According to the image pickup apparatus of the second aspect, since the video movie can be used by selecting the control signal table optimized according to whether or not the liquid crystal monitor is used, particularly when the liquid crystal monitor is used, In comparison, a stable photographed image with less camera shake can be obtained.

  According to the imaging apparatus of the third aspect, the video signal can be used by selecting the control signal table optimized for the moving image shooting mode and the still image shooting mode. Therefore, it is possible to obtain a stable photographed image with less camera shake as compared with the prior art.

  According to the imaging apparatus of the fourth aspect, the control signal table optimized in accordance with the optical zoom shooting mode and the electronic zoom shooting mode can be selected and the video movie can be used. In the mode, it is possible to obtain a stable photographed image with less camera shake as compared with the conventional case.

  According to the imaging device of the fifth aspect, since the control signal table can be rewritten any number of times, it is possible to easily cope with software upgrades on the manufacturer side.

  According to the imaging device of the sixth aspect, in addition to the effect of the imaging device of the fifth aspect, a plurality of control signal tables can be stored, so that a plurality of users can select and use each control signal table. Thus, it becomes possible to obtain a stable photographed image with less camera shake.

  According to the imaging device of the seventh aspect, since the control signal table can be rewritten entirely by the individual user, it is possible to obtain an optimal control signal table without the trouble of sending data to the manufacturer side. it can.

  According to the imaging apparatus of the eighth aspect, in addition to the effect of the imaging apparatus of the seventh aspect, a plurality of control signal tables can be stored, so that a plurality of users can select and use each control signal table. Thus, it becomes possible to obtain a stable photographed image with less camera shake.

(Embodiment 1)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 is a hardware configuration diagram of a camera shake correction device, FIG. 2 is an exploded perspective view showing a camera shake correction optical mechanism, FIG. 3 is a conceptual diagram showing the effect of camera shake correction of a control signal table, and FIG. 4 is a user selection menu. FIG. 5 is a flowchart showing a user selection mode.

  An imaging optical system 20 includes four lens groups L1, L2, L3, and L4. When the lens group L2 moves in the optical axis direction, zooming is performed, and the lens group L4 moves in the optical axis direction. By moving to, focusing operation is performed. The lens group L3 serves as a correction lens group, and moves in a plane perpendicular to the optical axis, thereby decentering the optical axis and correcting the movement of the image.

  The L3 lens group drive control means 21 is a control means for driving and controlling the lens group L3, which is a shake correction lens group, and moves the lens group L3 vertically and horizontally within a plane orthogonal to the optical axis of the imaging optical system 20. Let The movement amount detection means 22 is a detection means for detecting the actual movement amount of the lens group L3, and forms a feedback control loop for driving and controlling the lens group L3 together with the L3 lens group drive control means 21. Such a lens group L3 and the lens group drive control means 21 form a motion correction means for controlling the optical axis of the imaging light.

  The imaging optical system drive control unit 23 controls the lens groups L2 and L4 in the imaging optical system 20, performs zooming and focusing operations, and outputs the focal length information of the imaging optical system 20. Also have. The A / D conversion unit 24 is a conversion unit that converts the focal length information of the imaging optical system output from the imaging optical system drive control unit 23 into a digital signal and supplies the digital signal.

  The solid-state imaging device 26 is an imaging device that converts an image incident through the imaging optical system 20 into an electrical signal. The analog signal processing unit 28 is a processing unit that performs analog signal processing such as gamma processing on the video signal obtained by the solid-state imaging device 26. The A / D conversion unit 29 is a conversion unit that converts the analog video signal output from the analog signal processing unit 28 into a digital signal. The digital signal processing unit 30 is a signal processing unit that performs digital signal processing such as noise removal and edge enhancement on the video signal converted into a digital signal by the A / D conversion unit 29.

  The angular velocity sensor 31 is a sensor for detecting the movement of the imaging apparatus itself including the imaging optical system 20, and is positive or negative depending on the direction of the movement of the video movie 1 with reference to the output when the video movie 1 is stationary. Both angular velocity signals are output. The angular velocity sensor 31 is a sensor that detects movement in two directions of yawing and pitching, and two angular velocity sensors 31 are provided. FIG. 1 shows only one direction. As described above, the angular velocity sensor 31 has a function of motion detection means for detecting the motion of the video movie 1 due to camera shake and other vibrations.

  The HPF 32 is a high-pass filter that removes a DC drift component in unnecessary band components included in the output of the angular velocity sensor 31. The LPF 33 is a low-pass filter that removes the resonance frequency component and noise component of the sensor from unnecessary band components included in the output of the angular velocity sensor 31. The amplifier 34 is a circuit for adjusting the output signal level of the angular velocity sensor. The A / D conversion means 35 is a conversion means for converting the output signal of the amplifier 34 into a digital signal, and its output is given to the microcomputer 25.

  The microcomputer 25 performs filtering, integration processing, phase compensation, gain adjustment, clip processing, and the like on the output signal of the angular velocity sensor 31 taken in via the A / D conversion means 35, and an L3 lens group necessary for motion correction Is a control signal generating means for obtaining and outputting a drive control amount (hereinafter referred to as a control signal). The storage means 11 can store several types of control signal tables showing the relationship of the degree of suppression with respect to the camera shake frequency. In this embodiment, the user A, user B, user C as shown in FIG. The three types of control signal tables are stored. The microcomputer 25 generates a control signal along the control signal table. The user selection unit 12 is a selection unit that selects, for example, the control signal table for the user A from the control signal table stored in the storage unit 11. The control signal is output to the L3 lens group control means 21 via the D / A conversion means 36. The L3 lens group driving means 21 corrects the motion of the image by driving the L3 lens group based on the control signal. The solid-state image sensor drive control means 27 is a control means for controlling the operation of the solid-state image sensor 26.

  FIG. 2 is an exploded perspective view showing an example of a camera shake correction optical mechanism 39 that drives and controls the lens unit L3 in the imaging optical system 20 in a direction orthogonal to the optical axis. The L3 lens group is fixed to the pitching movement frame 40, and this pitching movement frame 40 is held so as to be slidable in the Y direction with respect to the yawing movement frame 41. In addition, coils 43x and 43y are fixed to the pitching moving frame 40. The yawing movement frame 41 is held slidable in the X direction with respect to the fixed frame 42. The magnet 45x and the yoke 46x are held by the fixed frame 42 and constitute an actuator 47x together with the coil 43x. Similarly, the magnet 45y and the yoke 46y are held by the fixed frame 42 and constitute an actuator 47y together with the coil 43y. The light emitting element 48 is fixed to the pitching movement frame 40. The light receiving element 49 is an element that receives the projection light of the light emitting element 48 and detects a two-dimensional position coordinate, and is fixed to the fixed frame 42.

  Next, the operation of the actuator will be described. When current is supplied to the coils 43x and 43y of the pitching moving frame 40 from an external circuit, the pitching moving frame 40 is moved in two directions X and Y planes perpendicular to the optical axis Z by a magnetic circuit formed by the actuators 47x and 47y. Move in. In addition, since the position of the pitching moving frame 40 is detected by the light receiving element 49, highly accurate position detection can be performed. That is, by moving the L3 lens group in two planes orthogonal to the optical axis by the camera shake correction optical mechanism 39, it is possible to correct an image incident on the image pickup device 26 via the image pickup optical system 20. As described above, the camera shake correction apparatus 50 is configured by the hardware shown in FIG. 1 and the camera shake correction optical mechanism 39 shown in FIG.

The operation of the imaging apparatus equipped with the camera shake correction apparatus 50 configured as described above will be described.
When the user, that is, the photographer of the video movie 1 turns on the power and actually shoots, first, the user information is selected from user information registered in advance in the user selection mode. This will be described with reference to the flowchart shown in FIG. A user who takes a picture is selected from the user selection menu 4 displayed on the liquid crystal monitor 51 mounted on the video movie 1 (S401). If the photographer is A, user A is selected. Next, the control signal table dedicated to the user A selected from the storage means 11 is read and transferred to the microcomputer 25 (S402). As described above, the user selection menu is terminated, and shooting is performed according to the normal method of using the video movie 1. Therefore, when the user A is selected, the camera shake correction performance of the video movie 1 is the best in the vicinity of 3 (Hz) as shown in FIG. That is, if it is known that the hand shake frequency of the user A is around 3 (Hz), the best performance for the user A is selected by selecting a system with the best hand shake correction performance around the 3 (Hz). Since it is possible to shoot using the good video movie 1, it is possible to correct camera shake by the user A and easily obtain a stable image.

  Similarly, when the photographers are user B and user C, the control signal tables suitable for user B and user C are read out and transferred to the microcomputer 25. If it is known that the camera shake frequencies of user B and user C are prominent in the vicinity of 5 (Hz) and 7 (Hz), respectively, the camera shake correction performance is the best in the vicinity of 5 (Hz) and 7 (Hz). By selecting this control signal table, it is possible to shoot using the video movie 1 that has the best performance for the users B and C. Therefore, it is possible to optimally correct the camera shake caused by the user B and the user C and easily obtain a stable image.

  As described above, according to the present embodiment, an image pickup apparatus equipped with the camera shake correction device 50 can provide a video movie in which the system is adjusted according to the camera shake frequency of an actual user. Can be used to obtain a stable image more easily than ever. Furthermore, even when a single video movie is used by multiple users, multiple users can select and use the control signal table, so the camera shake correction should be adjusted according to the shake frequency of each user. Can do.

  In this embodiment, as a method of measuring the user's hand shake frequency in advance, for example, a manufacturer can provide a handshake frequency measurement-purpose image pickup device at a store that sells the image pickup device, and the user can use it freely. If the camera shake frequency can be measured, the user can easily measure his camera shake frequency. Therefore, the present embodiment can be easily realized by selecting the control signal table most similar to the own camera shake frequency from the selection menu 4.

  In this embodiment, the selection menu is displayed on the liquid crystal monitor 51. However, the video movie 1 main body may be provided with a selection button. Although there are three types of control signal tables, users A, B, and C, they are not limited to three types.

  The control signal table has been described with respect to either the pitching or yawing direction of the camera shake correction device 50. Needless to say, the control signal table is prepared for both, but the user may perform pitching or yawing. If the direction control signal table is optimized, a further camera shake correction effect can be obtained.

Furthermore, although a video movie has been described as an example of an imaging device, it goes without saying that the same effect can be obtained for a digital still camera equipped with a camera shake correction device or a camera using a silver salt film.
(Embodiment 2)
Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. FIG. 6 is a conceptual diagram showing a video movie holding method with the display device closed, FIG. 7 is a hardware configuration diagram of a camera shake correction device, and FIG. 8 is a conceptual diagram showing the effect of camera shake correction of a control signal table. It is. In addition, what was demonstrated so far attaches | subjects the same code | symbol and the description is abbreviate | omitted.

  The video movie 1 is equipped with a liquid crystal monitor 51 for displaying a photographed image. The image memory 54 temporarily stores the image signal that has passed through the digital signal processing means 30. The captured image once recorded in the image memory 54 is displayed on the liquid crystal monitor 51 via the image display control means 52 in accordance with a command from the image memory drive control means 55.

  The photographing form of the photographer is divided into a case where the liquid crystal monitor 51 is used and a case where the viewfinder 56 is used. When shooting using the liquid crystal monitor 51, the liquid crystal monitor 51 is used in a state opened from the video movie 1 as shown in FIG. This figure shows the situation of face-to-face shooting, and during normal shooting, the liquid crystal monitor 51 is inverted 180 ° so that the subject appears on the photographer side (the back side of the drawing). Accordingly, the photographer performs framing, zoom adjustment, and the like while looking at the liquid crystal monitor 51.

  On the other hand, when shooting without looking at the liquid crystal monitor 51 and shooting through the viewfinder 56, the shooting state is as shown in FIG. Whether the liquid crystal monitor 51 is open or closed is determined by a liquid crystal monitor open / close determination switch 53.

  The storage means 11 can store several types of control signal tables indicating the relationship of the degree of suppression with respect to the camera shake frequency. In this embodiment, the liquid crystal monitor 51 as shown in FIG. Two types of control signal tables 57 are stored when the liquid crystal monitor is turned off. When the image is taken using the viewfinder 56 with the liquid crystal monitor 51 turned off, the control signal table is such that the camera shake correction performance is best when the camera shake frequency is around 5 (Hz).

  On the other hand, when the liquid crystal monitor 51 is used, the liquid crystal monitor 51 is used by being opened laterally from the main body of the video movie 1, so that the position of the center of gravity of the video movie 1 is shifted to the liquid crystal monitor 51 side. As a result, the photographing posture of the photographer becomes unstable, so that the peak of the camera shake frequency shifts to a higher level than when the liquid crystal monitor 51 is turned off. Therefore, the control signal table is such that the camera shake correction performance is best when the camera shake frequency is around 7 (Hz). The microcomputer 25 makes a determination based on the determination signal from the liquid crystal monitor open / close determination switch 53 and automatically selects one from the control signal table 57.

The operation of the imaging apparatus equipped with the camera shake correction apparatus 50 configured as described above will be described.
When the photographer of the video movie 1 turns on the power, the shooting state is set.

  First, a case will be described where shooting is performed using the viewfinder 56 without using the liquid crystal monitor 51. At this time, since the liquid crystal monitor 51 is not used, the OFF state is detected by the determination signal of the liquid crystal monitor open / close determination switch 53. Then, the control signal table with the liquid crystal monitor OFF is read from the storage means 11 and transferred to the microcomputer 25. As shown in FIG. 8, the camera shake correction performance at this time is a system having the best performance in the vicinity of 5 (Hz), and a stable image with less camera shake can be obtained.

  Next, a case where shooting is performed using the liquid crystal monitor 51 will be described. At this time, since the liquid crystal monitor 51 is used, the ON state is detected by the discrimination signal of the liquid crystal monitor open / close discrimination switch 53. Therefore, the control signal table in the liquid crystal monitor ON state is read from the storage means 11 and transferred to the microcomputer 25. As shown in FIG. 7, the camera shake correction performance at this time is a system having the best performance in the vicinity of 7 (Hz), and a stable photographed image can be obtained.

  As described above, according to the present embodiment, an optimal control signal table is obtained even if the frequency of camera shake by a photographer changes depending on whether a liquid crystal monitor or the like is used in an imaging apparatus equipped with the camera shake correction apparatus 50. Since it can be automatically selected and used, it is possible to obtain a stable photographed image with less camera shake than ever even in an unstable photographing posture.

The format of the control signal table is not limited to the two described in the present embodiment. The liquid crystal monitor as a display device may be anything as long as it can display a captured image, and the configuration is not limited to the form of the present embodiment.
(Embodiment 3)
Hereinafter, a third embodiment of the present invention will be described with reference to FIGS. FIG. 9 is a hardware configuration diagram of the camera shake correction apparatus, and FIG. 10 is a conceptual diagram showing the effect of camera shake correction of the control signal table. In addition, what was demonstrated so far attaches | subjects the same code | symbol and the description is abbreviate | omitted.

  The video movie 1 is equipped with two types of video shooting modes for shooting moving images and still image shooting modes for shooting still images. When a moving image is selected by the moving image / still image switching switch 58, a moving image shooting mode is set, and shooting is started / stopped by a shooting ON / OFF button 59. When photographing is started, the photographed image is temporarily stored in the image memory 54 via the digital signal processing means 30, and compressed by the image compression means 61 via a predetermined algorithm. The compressed photographed image is recorded on, for example, a magnetic tape (not shown) by the tape recording means 62.

  On the other hand, when a still image is selected by the moving image / still image switching switch 58, a still image shooting mode is set, and a still image can be shot by pressing the shutter button 60. The still image is temporarily stored in the image memory 54 through the digital signal processing means 30 and compressed by the image compression means 61 through a predetermined algorithm. The compressed still image is recorded in a portable recording medium such as an SD card (not shown) in the card recording means 63.

  The storage means 11 can store several types of control signal tables indicating the relationship of the degree of suppression with respect to camera shake frequency. In this embodiment, the storage unit 11 has two types of video shooting mode and still image shooting mode as shown in FIG. The control signal table 64 is stored. In the case of the moving image shooting mode, the control signal table is such that the camera shake correction performance is best when the camera shake frequency is around 5 (Hz).

  On the other hand, the still image shooting mode is basically the same as the moving image shooting mode, but the effect of camera shake correction in the vicinity of 1 to 2 (Hz) is increased. The reason will be explained. When performing framing while following a subject while performing moving image shooting, the photographer performs panning and tilting operations. The frequency at this time is very low and is 1-2 (Hz). Therefore, if the effect of correcting the camera shake in the vicinity is increased, the camera shake correction device 50 operates, causing a malfunction of the system in which framing cannot be performed, resulting in inconvenience. Therefore, the effect of camera shake correction in the vicinity of 1 to 2 (Hz) is reduced during moving image shooting in which panning and tilting operations are frequently performed. On the other hand, at the time of still image shooting, the shutter button 60 is pressed after framing is completed, so panning and tilting operations are rarely performed while shooting. Therefore, even if the effect of camera shake correction near 1 to 2 (Hz) is increased, no malfunction occurs. The microcomputer 25 makes a determination based on the determination signal of the moving image / still image switching switch 58 and automatically selects one from the control signal table 64.

The operation of the imaging apparatus equipped with the camera shake correction apparatus 50 configured as described above will be described.
When the photographer of the video movie 1 turns on the power, the shooting state is entered.

  First, the moving image shooting mode will be described. At the time of moving image shooting, the moving image / still image switching switch 58 detects the moving image shooting mode. Then, the control signal table for the moving image shooting mode is read from the storage unit 11 and transferred to the microcomputer 25. As shown in FIG. 10, the camera shake correction performance at this time is a system having the best performance in the vicinity of 5 (Hz), and a stable image with less camera shake can be obtained.

  Next, the still image shooting mode will be described. At the time of still image shooting, the still image mode is detected by the moving image / still image switching switch 58. Then, a control signal table for still image shooting is read from the storage means 11 and transferred to the microcomputer 25. As shown in FIG. 10, the image stabilization performance at this time is the best at around 5 (Hz), and the image stabilization performance is also improved at 1 to 2 (Hz) compared to when shooting a movie. To do. Therefore, it is possible to shoot a high-quality still image without camera shake.

  As described above, according to the present embodiment, in an imaging apparatus equipped with the camera shake correction device 50, camera shake correction can be performed during still image shooting, in addition to camera shake correction during conventional moving image shooting. Moreover, at the time of still image shooting, since it has excellent camera shake correction performance even at a low frequency near 1-2 (Hz), a stable shot image with less camera shake than before can be obtained.

The format of the control signal table is not limited to that described in the present embodiment.
The moving image is recorded on the magnetic tape by the tape recording means 62. However, simple moving images such as MPEG and Motion JPEG may be recorded on the recording medium by the card recording means 63.
(Embodiment 4)
Hereinafter, a fourth embodiment of the present invention will be described with reference to FIGS. FIG. 11 is a hardware configuration diagram of a camera shake correction device, FIG. 12 is an explanatory diagram for explaining an electronic zoom function of a captured image, and FIG. 13 is a conceptual diagram showing an effect of camera shake correction of a control signal table. In addition, what was demonstrated so far attaches | subjects the same code | symbol and the description is abbreviate | omitted.

  The storage unit 11 can store several types of tables indicating the relationship of the degree of suppression with respect to the camera shake frequency. In the present embodiment, two types of control of the optical zoom shooting mode and the electronic zoom shooting mode as shown in FIG. A signal table 66 is stored.

  In the optical zoom shooting mode, by operating the zoom magnification change lever 65, the lens groups L2 and L4 in the imaging optical system 20 are driven to perform zooming and focusing operations. By increasing the optical magnification, it is possible to photograph a large subject as shown in FIG. In the case of this optical zoom photographing mode, the control signal table is such that the camera shake correction performance is best when the camera shake frequency is around 5 (Hz), and the shake correction lens group L3 is driven according to the optical magnification. The camera shake of the photographer is corrected.

  In addition, the electronic zoom function is used when shooting with the subject up. The electronic zoom processing means 67 performs electronic enlargement processing (referred to as electronic zoom processing) on a part of the image signals read from the image memory 54 and enlarges the image. For example, when the optical zoom magnification is 10 times and the electronic zoom magnification is 2 times, the zoom magnification is 20 times in total. Therefore, even if the optical zoom magnification becomes maximum, if the zoom magnification changing lever 65 is further operated further toward the telephoto side, the electronic zoom is automatically switched. As a result, as shown in FIG. 12B, for example, a portion surrounded by a broken line in FIG. On the other hand, since the shake correction lens unit L3 operates according to the optical zoom magnification, even if the electronic zoom magnification increases, the correction amount does not increase. Therefore, when electronic zoom processing is performed, an image captured at the maximum optical zoom magnification is electronically enlarged according to the electronic zoom magnification, so that a captured image affected by camera shake is enlarged as it is. Thus, the captured image is more noticeable. Here, when the subject is raised using the electronic zoom function, panning and tilting operations for performing framing are not frequently performed thereafter. Therefore, the electronic zoom shooting mode is basically the same as the optical zoom shooting mode, but as in the still image shooting mode described in the third embodiment, image stabilization in the vicinity of 1 to 2 (Hz) is performed. The effect is increased. The microcomputer 25 makes a determination based on the operation amount of the zoom magnification changing lever 65 and automatically selects one from the control signal table 66.

The operation of the imaging apparatus equipped with the camera shake correction apparatus 50 configured as described above will be described.
When the photographer of the video movie 1 turns on the power, the shooting state is entered. First, the optical zoom shooting mode will be described. The control signal table for the optical zoom photographing mode is read from the storage means 11 and transferred to the microcomputer 25. As shown in FIG. 13, the camera shake correction performance at this time is a system having the best performance in the vicinity of 5 (Hz), and a stable image with less camera shake can be obtained.

  Next, the electronic zoom shooting mode will be described. Even if the optical zoom is maximized, if the zoom magnification changing lever 65 is further operated further to the telephoto side, the electronic zoom photographing mode is automatically switched. Then, a control signal table for the electronic zoom photographing mode is read from the storage unit 11 and transferred to the microcomputer 25. As shown in FIG. 13, the image stabilization performance at this time is the best in the vicinity of 5 (Hz), and the image stabilization performance is also improved for 1-2 (Hz) compared to the optical zoom shooting mode. To do. Therefore, it is possible to shoot with less camera shake even during electronic zooming.

  As described above, according to the present embodiment, in an imaging apparatus equipped with the camera shake correction device 50, camera shake correction can be performed during electronic zooming in addition to camera shake correction during conventional optical zooming. In addition, the electronic zoom has excellent camera shake correction performance even at low frequencies in the vicinity of 1 to 2 (Hz), so that a stable photographed image with less camera shake than before can be obtained.

The format of the control signal table is not limited to that described in the present embodiment.
(Embodiment 5)
Hereinafter, a fifth embodiment of the present invention will be described with reference to FIGS. 14 is a hardware configuration diagram of a camera shake correction device, FIG. 15 is a conceptual diagram showing a method for writing a control signal table, FIG. 16 is a conceptual diagram showing a control signal table rewriting menu, and FIG. 17 is a control signal table. It is a flowchart which shows rewriting mode. In addition, what was demonstrated so far attaches | subjects the same code | symbol and the description is abbreviate | omitted.

  The recording medium 5 on which several types of control signal tables are recorded is inserted into the video movie 1 by the recording medium insertion means 14. On this recording medium 5, three types of control signal tables are recorded: a control signal table A, a control signal table B, and a control signal table C shown in FIG. The software reading means 13 reads the contents of the recording medium 5.

The operation of the imaging apparatus equipped with the camera shake correction apparatus 50 configured as described above will be described.
Before the user A, that is, the photographer of the video movie 1 uses it for the first time after purchase, the software corresponding to his / her camera shake frequency is written in the video movie 1 by the control signal table rewriting mode. This will be described with reference to the flowchart shown in FIG. The recording medium 5 in which several types of control signal tables are written is inserted into the insertion means 14 for the video movie 1 (S1701). This control signal table is supplied from the manufacturer of the video movie 1, and the manufacturer has prepared in advance several types of optimal control signal tables according to the frequency of camera shake. A control signal table required by the user is selected from the control signal table rewrite menu 7 (S1702). At this time, the user A knows that his / her hand shake frequency is remarkable around 3 (Hz), and therefore selects the control signal table A with the best hand shake correction performance around 3 (Hz). . The software reading means 13 reads the selected control signal table (S1703). Finally, the read control signal table is written in the storage means 11 (S1704). As described above, the control signal rewriting mode is ended, and shooting is performed according to the normal method of using the video movie 1. Since the control signal table A is read in this way, it is possible to shoot using the video movie 1 having the best performance for the user A. Therefore, the camera shake by the user A is corrected, and a stable image is obtained. Can be obtained.

  Similarly, when the photographers are user B and user C, since they know that their own camera shake frequencies are prominent in the vicinity of 5 (Hz) and 7 (Hz), respectively, 5 (Hz) and 7 ( Hz), a control signal table B and a control signal table C that provide the best camera shake correction performance are selected and written. Therefore, since shooting can be performed using the video movie 1 having the best performance for the user B and the user C, camera shake by the user B and the user C can be corrected, and a stable image can be obtained.

  Further, since the control signal tables A, B, and C read once can be stored in the storage unit 11, as described in the first embodiment, a plurality of users, that is, users A, User B and user C can select from the user selection menu 4 displayed on the liquid crystal monitor 51. Therefore, if set for the first time, it is not necessary to read the control signal table from the recording medium 5 when used from the second time.

  As described above, according to the present embodiment, an imaging apparatus equipped with the image stabilization device 50 can provide a video movie in which the system is adjusted according to the actual user's image stabilization frequency. However, since it can be rewritten, it is possible to obtain a stable image more easily than before by using the camera shake correction device 50. In addition, even when multiple users use a single video movie, multiple users can select and use the optimal control signal table, so the system can be adjusted to match each user's camera shake frequency. can do.

  In the present embodiment, as a method for measuring the user shake frequency in advance, the following method is conceivable in addition to the method described in the first embodiment. In other words, a signal indicating the frequency of camera shake, such as a video signal, is sent to the manufacturer, and the manufacturer analyzes the frequency of the user's camera shake based on the video signal. Then, the control signal table most suitable for the camera shake frequency is sent to the user, and the user writes the control signal table in the video movie 1. Therefore, if this method is used, it is not necessary to go to a store or the like, and after the video movie 1 is actually purchased, data can be exchanged from the home via the Internet or the like. Furthermore, it is possible to easily cope with a version upgrade of the control signal software on the manufacturer side, and the user can use the purchased video movie for a long time.

There are three types of control signal tables A, B, and C, but the number of control signal tables is not limited to three.
The type of the recording medium 5 is not limited, such as an SD card or a multimedia card. Further, the present invention is not limited to the recording medium, and the control signal table downloaded from the manufacturer may be directly written from the personal computer by USB or the like.
(Embodiment 6)
The sixth embodiment of the present invention will be described below with reference to FIGS. 18 is a hardware configuration diagram of a camera shake correction device, FIG. 19 is a conceptual diagram showing a method for creating a control signal table, and FIG. 20 is a flowchart showing a camera shake frequency analysis mode. In addition, what was demonstrated so far attaches | subjects the same code | symbol and the description is abbreviate | omitted.

  The frequency analysis means 16 analyzes the hand shaking frequency of the user based on the output of the angular velocity sensor 31. When analyzing the hand shake frequency of the user A, as shown in FIG. 19, it is analyzed from the hand shake frequency analysis result 8 at which frequency the hand shake frequency of the user A is large. The software creation means 15 creates the control signal table A that is optimal for the hand shake of the user A from the hand shake frequency analysis result 8. Similarly, when analyzing the hand shake of the user B and the user C, it is analyzed from the hand shake frequency result 8 at which frequency the hand shake frequency of the user B and the user C is larger. The software creation means 15 creates control signal tables B and C that are optimal for the shakes of the users B and C from the shake frequency analysis result 8.

The operation of the imaging apparatus equipped with the camera shake correction apparatus 50 configured as described above will be described.
Before the user A, that is, the photographer of the video movie 1, purchases it for the first time after purchase, the camera shake frequency analysis mode is used to analyze the camera shake frequency of the user A, and the software suitable for the camera shake frequency of the video movie 1 is installed. Write to storage means 11. This will be described with reference to the flowchart shown in FIG. The user holds the video movie 1 and takes a state of shooting for a certain time (S2001). The signal 2 indicating the user shake frequency is recorded (S2002). The frequency analysis unit 16 performs frequency analysis of the signal 2 indicating the camera shake frequency (S2003). At this time, the camera shake frequency of the user A becomes prominent in the vicinity of 3 (Hz). The software creation means 15 creates the control signal table A that matches the hand shake frequency of the user A from the hand shake frequency analysis result 8 (S2004). That is, the control signal table A that provides the best camera shake correction performance is created near the hand shake frequency 3 (Hz) of the user A. The created control signal table A is written in the storage means 11 (S2005). As described above, the camera shake frequency analysis mode is ended, and shooting is performed according to the normal method of using the video movie 1. Therefore, the user A's camera shake frequency is analyzed, and the control signal table A optimum for the camera shake frequency is created and read, so that the video movie 1 having the best performance for the user A can be used for shooting. Therefore, it is possible to correct camera shake by the user A and obtain a stable image.

  Similarly, when the photographers are the user B and the user C, the frequency analysis means 16 shows that the respective camera shake frequencies become prominent in the vicinity of 5 (Hz) and 7 (Hz). Therefore, a control signal table that provides the best camera shake correction performance in the vicinity of the hand shake frequencies 5 (Hz) and 7 (Hz) of the user B and the user C is created and written in the storage unit 11. Therefore, since shooting can be performed using the video movie 1 having the best performance for the user B and the user C, camera shake by the user B and the user C can be corrected, and a stable image can be obtained.

  Furthermore, since the control signal tables A, B, and C that have been read once can be stored in the storage unit 11, as described in the first embodiment, a plurality of users, that is, the user A The user B and the user C can select from the user selection menu 4 shown in FIG. 4 displayed on the liquid crystal monitor 51. Therefore, if set for the first time, it is not necessary to use the frequency analysis means 16 when used from the second time.

  As described above, according to the present embodiment, an imaging apparatus equipped with the image stabilization device 50 can provide a video movie in which the system is adjusted according to the actual user's image stabilization frequency. However, since it can be rewritten, it is possible to obtain a stable image more easily than before by using the camera shake correction device 50. Furthermore, since the frequency analysis means 16 is provided, the system can be completely rewritten by the individual user, so that the trouble of sending data to the manufacturer side can be saved. In addition, even when a single video movie is used by multiple users, multiple users can select and use the optimal control signal table, so the system can be adjusted to match each user's camera shake frequency. Can be adjusted.

In this embodiment, the types of control signal tables are three types of users A, B, and C, but are not limited to three types.
The signal indicating the camera shake frequency may be anything as long as the camera shake frequency can be detected, and may be a video signal or the like.

  Furthermore, software installed in a video movie that creates a control signal table by performing frequency analysis can be rewritten with a version upgrade from the manufacturer, thereby creating a more accurate control signal table.

  INDUSTRIAL APPLICABILITY The present invention is useful for an imaging apparatus or the like equipped with a camera shake correction device that enables anyone to obtain a stable image during shooting and performs camera shake correction.

Hardware configuration diagram of a camera shake correction apparatus according to the first embodiment 1 is an exploded perspective view showing an image stabilization optical mechanism in the first embodiment. The conceptual diagram which shows the effect of camera-shake correction of the table for control signals in 1st Embodiment The conceptual diagram which shows the user selection menu in 1st Embodiment The flowchart which shows the user selection mode in 1st Embodiment Schematic diagram showing a method for holding a video movie with the display device closed in the second embodiment Hardware configuration diagram of an image blur correction apparatus according to the second embodiment The conceptual diagram which shows the effect of the camera-shake correction of the table for control signals in 2nd Embodiment Hardware configuration diagram of a camera shake correction apparatus according to the third embodiment The conceptual diagram which shows the effect of camera-shake correction of the table for control signals in 3rd Embodiment Hardware configuration diagram of a camera shake correction apparatus according to the fourth embodiment Explanatory drawing explaining the electronic zoom function of the picked-up image in 4th Embodiment The conceptual diagram which shows the effect of camera-shake correction of the table for control signals in 4th Embodiment Hardware configuration diagram of a camera shake correction apparatus according to the fifth embodiment Conceptual diagram showing a method of writing a control signal table in the fifth embodiment The conceptual diagram which shows the rewriting menu of the table for control signals in 5th Embodiment Flowchart showing a control signal table rewrite mode in the fifth embodiment Hardware configuration diagram of a camera shake correction apparatus according to the sixth embodiment The conceptual diagram which shows the method of producing the table for control signals in 6th Embodiment Flowchart showing a camera shake frequency analysis mode in the sixth embodiment Diagram showing how videographers can hold videographers Conceptual diagram showing the effect of image stabilization on conventional image stabilization frequency

Explanation of symbols

1 Video movie 2 Signal indicating camera shake frequency
4 User selection menu 5 Recording media 7 Control signal table rewrite menu 8 Frequency analysis result 11 Storage means 12 User selection means 13 Software reading means 14 Recording media insertion means 15 Software creation means 16 Frequency analysis means 20 Imaging optical system 21 L3 lens group Drive control means 22 Movement amount detection means 23 Imaging optical system drive control means 24 A / D conversion means 25 Microcomputer 26 Solid-state image sensor 27 Solid-state image sensor control means 28 Analog signal processing means 29 A / D conversion means 30 Digital signal processing means 31 Angular velocity sensor 32 HPF
33 LPF
34 Amplifier 35 A / D conversion means 36 D / A conversion means 39 Shake correction optical mechanism 40 Pitching moving frame 41 Yawing moving frame 42 Fixed frame 43x Coil 43y Coil 45x Magnet 45y Magnet 46x Yoke 46y Yoke 47x Actuator 47y Actuator 48 Light emitting element 49 Light receiving element 50 Camera shake correction device 51 Liquid crystal monitor 52 Image display control means 53 Liquid crystal monitor open / close discrimination switch 54 Image memory 55 Image memory drive control means 56 Viewfinder 57 Control signal table 58 Video / still image switch 59 Shooting ON / OFF button 60 Shutter button 61 Image compression means 62 Tape recording means 63 Card recording means 64 Control signal table 65 Zoom magnification change lever 66 Control signal table Le 67 Electronic zoom processing means L1 lens group L2 lens group L3 lens group L4 lens group

Claims (5)

An imaging apparatus having an imaging optical system,
First detection means for detecting movement of the imaging device due to camera shake and other vibrations;
Second detection means for detecting user settings associated with the imaging device;
Motion correction means for correcting the motion of a captured image caused by the motion of the imaging device;
Control signal generating means for generating a control signal for the motion correcting means based on the output of the motion detecting means;
Storage means capable of storing a plurality of tables indicating response characteristics of the motion correction means with respect to the output of the first detection means;
Table selection means for selecting a table stored in the storage means based on a detection result of the second detection means;
The image pickup apparatus, wherein the control signal generating means changes the control signal according to the selected table. The imaging apparatus further includes display means capable of displaying an image,
The second detection means detects a use state of the display means as the user setting,
The imaging apparatus according to claim 1, wherein the storage unit stores a plurality of tables indicating response characteristics of the motion correction unit according to whether the display unit is used. The imaging device has a moving image shooting mode and a still image shooting mode,
The second detection means detects switching between the moving image shooting mode and the still image mode as the user setting,
2. The imaging apparatus according to claim 1, wherein the storage unit stores a plurality of tables indicating response characteristics of the motion correction unit according to the moving image shooting mode and the still image shooting mode. The imaging device has an optical zoom mode and an electronic zoom mode,
The second detection means detects switching between an optical zoom mode and an electronic zoom mode as the user setting,
The imaging apparatus according to claim 1, wherein the storage unit stores a plurality of tables indicating response characteristics of the motion correction unit according to the optical zoom mode and the electronic zoom mode. An imaging apparatus having an imaging optical system,
First detection means for detecting movement of the imaging device due to camera shake and other vibrations;
Second detection means for detecting user settings associated with the imaging device;
Motion correction means for correcting the motion of a captured image caused by the motion of the imaging device;
Control signal generating means for generating a control signal for the motion correcting means based on the output of the first detecting means;
Storage means capable of storing a plurality of tables indicating response characteristics of the motion correction means with respect to the output of the first detection means;
Reading means for reading a table indicating response characteristics of the motion correction means with respect to the output of the first detection means from the outside and storing them in the storage means;
Table selection means for selecting the table based on the detection result of the second detection means,
The image pickup apparatus, wherein the control signal generating means changes the control signal according to the selected table.

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