JP2010258851A - Image processing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image processing apparatus for smoothly playing back a moving image. <P>SOLUTION: The image processing apparatus 1 plays back and displays an image group, which is captured by a plurality of frames having prescribed frame intervals, sequentially at prescribed playback frame intervals in an order of capturing. The image group includes first and second images which are captured within a first exposure time shorter than at least the frame interval, in preceding and following adjacent first and second frames. The image processing apparatus 1 comprises a first display control means 14 for overlapping the first image and the second image at least partially within the playback frame to produce a playback frame image signal. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an image processing apparatus.

  A technique for generating a frame image for a moving image for smooth reproduction using an image for a still image captured with an exposure time shorter than the exposure time for a moving image is known (see Patent Document 1). In the above technique, the same subject is extracted from two images captured at time t301 and time t305, and the position of the subject on the image at time t303 between time t301 and time t305 is calculated. A predicted image that can be captured at t303 is generated. Then, one frame image is generated by superimposing the two captured images at time t301 and time t305 and the predicted image at time t303.

JP 2006-287921 A

  In the related art, there is a problem in that a subject image is generated at a predicted position different from a subject that actually moves because the predicted images that are not actually captured are superimposed.

(1) An image processing apparatus according to the present invention is applied to an image processing apparatus that sequentially reproduces and displays an image group acquired for each of a plurality of frames having a predetermined frame interval at a predetermined reproduction frame interval in the acquisition order. The image group may include a first image and a second image that are acquired at a first exposure time shorter than at least the frame interval, and acquired in the first and second frames adjacent to each other before and after the first frame. It is characterized by comprising first display control means for generating a playback frame image signal by superimposing the image and the second image on at least a part of the playback frame.
(2) In the image processing apparatus according to claim 1, the first display control means converts the first image and the second image acquired in the first frame and the second frame, respectively, into a first exposure time in a reproduction frame. It is also possible to generate a reproduction frame image signal by superimposing within a range excluding.
(3) In the image processing apparatus according to claim 1, the first display control unit superimposes the first image and the second image acquired in the first frame and the second frame, respectively, in substantially the entire area in the reproduction frame. In addition, a playback frame image signal can be generated.
(4) In the image processing apparatus according to claim 1, the first display control unit superimposes the first image and the second image acquired in the first frame and the second frame, respectively, in a predetermined range in the reproduction frame. In addition, a playback frame image signal can be generated.
(5) In the image processing apparatus according to any one of claims 2 to 4, the first display control unit decreases a gain for the signal of the first image in a section in which the first image and the second image are overlapped. On the other hand, the gain for the signal of the second image can be increased.
(6) In the image processing apparatus according to claim 5, when the stop of reproduction display is instructed, the first display control means selects the signal of the image with the higher gain and displays the image as a still image. It is also possible to generate a reproduced image signal.
(7) In the image processing apparatus according to claim 6, the first display control means selects the second image signal and displays the still image when the gains for the first image signal and the second image signal are the same. It is also possible to generate a reproduced image signal for this purpose.
(8) In the image processing device according to any one of claims 1 to 7, the image group is acquired at a second exposure time substantially equal to a frame interval, and is composed of a third frame and a fourth frame adjacent to each other. The acquired third image and fourth image may be included. In this case, a second display control unit that generates a frame image signal so as to sequentially switch the third image and the fourth image at a frame interval in the order of acquisition, and the first display control unit and the second display according to the switching instruction. A switching control unit that causes one of the control units to generate a frame image signal may be further included.

  According to the image processing apparatus of the present invention, a moving image can be smoothly reproduced.

1 is a block diagram of an electronic camera according to an embodiment of the present invention. It is a figure which illustrates the timing which acquires a high-speed continuous-shot image. It is a figure which illustrates the timing which reproduces and displays a high-speed continuous-shot image. It is a figure which illustrates the structure of a display image creation circuit. FIG. 4 is an enlarged view of a part of the reproduction timing of FIG. 3. It is a figure which illustrates the timing which reproduces and displays in the modification 2. FIG. 11 is a diagram illustrating timing for reproducing and displaying in a third modification.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a block diagram for explaining a main configuration of an electronic camera 1 according to an embodiment of the present invention. The electronic camera 1 is controlled by the main CPU 11.

  The photographing lens 21 forms a subject image on the imaging surface of the imaging element 22. The imaging element 22 is configured by a CCD image sensor or the like, captures a subject image on the imaging surface, and outputs an imaging signal to the imaging circuit 23. R (red), G (green), and B (blue) color filters are respectively provided on the imaging surface of the imaging element 22 so as to correspond to the pixel positions. Since the image sensor 22 captures a subject image through the color filter, the photoelectric conversion signal output from the image sensor 22 has RGB color system color information. A so-called multi-plate configuration such as 3CCD / 4CCD may be used.

  The imaging circuit 23 performs analog processing (such as gain control) on the photoelectric conversion signal output from the imaging element 22, and converts the analog imaging signal into digital data by a built-in A / D conversion circuit.

  The main CPU 11 inputs a signal output from each block, performs a predetermined calculation, and outputs a control signal based on the calculation result to each block. The image processing circuit 12 is configured as an ASIC, for example, and performs image processing on the digital image signal input from the imaging circuit 23. The image processing includes, for example, contour enhancement, color temperature adjustment (white balance adjustment) processing, and format conversion processing for an image signal.

  The image compression circuit 13 performs image compression processing at a predetermined compression ratio on the image signal processed by the image processing circuit 12 by, for example, the JPEG method. The display image creation circuit 14 generates a display signal for displaying the captured image on the liquid crystal monitor 19.

  The liquid crystal monitor 19 includes a liquid crystal panel, and displays an image, an operation menu screen, and the like based on a display signal input from the display image creation circuit 14. The video output circuit 20 generates and outputs a video signal for displaying an image, an operation menu screen, or the like on an external display device based on the display signal input from the display image creation circuit 14.

  The buffer memory 15 temporarily stores data before and after image processing and during image processing, and also stores an image file before recording on the recording medium 30 and stores an image file read from the recording medium 30. Used for.

  The flash memory 16 stores programs executed by the main CPU 11, data necessary for processing performed by the main CPU 11, and the like. The contents of the program and data stored in the flash memory 16 can be added or changed by an instruction from the main CPU 11.

  The card interface (I / F) 17 has a connector (not shown), and a recording medium 30 such as a memory card is connected to the connector. The card interface 17 writes data to the connected recording medium 30 and reads data from the recording medium 30 in accordance with an instruction from the main CPU 11. The recording medium 30 is configured by a memory card incorporating a semiconductor memory, a hard disk drive, or the like.

  The operation member 18 includes various buttons and switches of the electronic camera 1, and outputs an operation signal corresponding to the operation content of each operation member, such as a release button pressing operation and a mode changeover switch switching operation, to the main CPU 11.

<Shooting mode>
The electronic camera 1 obtains a captured image one frame at a time in response to the pressing operation of the release button and records it on the recording medium 30 and a so-called moving image at a predetermined frame rate (for example, 60 frames / second). ) And recording to the recording medium 30 and still images at high shutter speed (for example, 1 / 100th of a second) are shot continuously at the above frame rate (60 frames / second in this example). A high-speed continuous shooting mode in which captured images of a plurality of frames are acquired and recorded on the recording medium 30; Each photographing mode is configured to be switchable according to an operation signal from the operation member 18.

<Playback mode>
The electronic camera 1 reproduces and displays an image recorded in the still image shooting mode on the liquid crystal monitor 19 for each frame and a moving image recorded in the recording mode with the frame rate (60 in this example). In addition to the moving image playback mode to be played back and displayed on the liquid crystal monitor 19 at a frame / second), the still image (referred to as high speed continuous shooting image) recorded in the high speed continuous shooting mode is used to play back on the liquid crystal monitor 19 There are two types of playback modes to be displayed (first playback mode and second playback mode).

  The first playback mode is a playback mode in which the images of the frames constituting the high-speed continuous shooting image recorded in the high-speed continuous shooting mode are played back and displayed on the liquid crystal monitor 19 as still images. The second playback mode is a playback mode in which the high-speed continuous shot image recorded in the high-speed continuous shooting mode is continuously played back and displayed on the liquid crystal monitor 19 as a moving image at a predetermined frame rate (60 frames / second in this example). In the second playback mode, the total time required for acquiring a plurality of images by high-speed continuous shooting is substantially equal to the total playback time for continuously displaying and displaying the plurality of images. Specifically, 600 frames of high-speed continuous shot images acquired at 60 frames / second for 10 seconds are continuously reproduced and displayed as moving images at 60 frames / second for 10 seconds. It should be noted that the total time required for acquisition and the total reproduction time do not necessarily match exactly. Each reproduction mode is configured to be switchable according to an operation signal from the operation member 18.

  Since the present embodiment has a feature in the second reproduction mode in which the high-speed continuous shot image is reproduced as a moving image, the second reproduction mode will be mainly described below.

<High-speed continuous shot image>
The high-speed continuous shot image that is reproduced and displayed by the electronic camera 1 in the second playback mode will be described. FIG. 2 is a diagram illustrating timing (upper stage) at which the electronic camera 1 acquires a high-speed continuous shot image in the high-speed continuous shooting mode. For comparison, the timing (lower stage) at which the electronic camera 1 acquires a moving image in the recording mode is also illustrated. In the upper part of FIG. 2, the electronic camera 1 in the high-speed continuous shooting mode starts continuous shooting at every frame interval T (for example, 1/60 seconds) when the release button is pressed, and the first frame, the second frame Acquire multiple frames of still images. The electronic camera 1 ends the continuous shooting when the release button pressing operation is released. In the high-speed continuous shooting mode, the exposure time of each frame is controlled so that the exposure time t1 (for example, 1/360 seconds) is shorter than the exposure time t2 in the recording mode described later. The exposure time t1 may be shorter than the frame interval T, but is preferably 1/2 or less of T.

  In the lower part of FIG. 2, the electronic camera 1 in the recording mode starts recording shooting at every frame interval T when the release button is pressed, and acquires a moving image composed of the first frame, the second frame,. The electronic camera 1 ends the recording when the release button is pressed again. In the recording mode, the exposure time of each frame is controlled so that the exposure time t2 (substantially equal to the frame interval T) is longer than the exposure time t1 in the high-speed continuous shooting mode.

  Thus, the exposure time t1 of each frame constituting the high-speed continuous shot image is sufficiently shorter than the exposure time t2 in the recording mode (t1 << t2). In this description, the case where the frame interval at the time of acquiring the high-speed continuous shot image and the frame interval in the recording mode match is illustrated, but it is not always necessary to match both frame intervals.

<Movie playback in second playback mode>
The electronic camera 1 switched to the second reproduction mode reproduces and displays a plurality of high-speed continuous shot images acquired at the timing illustrated in the upper part of FIG. FIG. 3 is a diagram illustrating timing at which the electronic camera 1 in the second playback mode reproduces and displays (smoothly reproduces) the high-speed continuous shot image.

  In FIG. 3, the electronic camera 1 starts reproduction display when a reproduction button constituting the operation member 18 is pressed. The electronic camera 1 generates a first frame image signal based on the first frame image data read from the recording medium 30, and the second frame image based on the second frame image data read from the recording medium 30. Generate a signal. Each frame image signal is gained up (fade in) so as to gradually increase the signal level of the reproduced image at time (T-t1), maintains the signal level only for time t1, and thereafter at time (T-t1). The gain is reduced (fade out) so as to gradually lower the signal level of the reproduced image. Then, a fade-out section of the Nth frame image signal and a fade-in section of the (N + 1) th frame image signal are combined so as to overlap by time (T−t1) to generate a display frame image.

  That is, in the N frames of the display frame image, the image based on the Nth frame image signal is displayed alone (non-superimposed display) at the original signal level for the time t1, and the Nth frame image signal and the (N + 1) th frame are displayed. An image obtained by superimposing the frame image signal with the frame image signal after adjusting the signal level is superimposed and displayed for a time (T-t1). In FIG. 3, a black section indicating a frame image for display represents a non-superimposed display section, and a gray section indicating a frame image represents a superimposed display section.

  In order to perform the reproduction display described above, the display image creation circuit 14 has a configuration illustrated in FIG. In FIG. 4, the display image creation circuit 14 includes frame memories 141 to 144, D / A converters 151 to 154, amplifier circuits 161 to 164, a control unit 171, and adders 181 to 183.

  The frame memory 141 stores, for example, image data for the Nth frame. For example, (N + 1) -th frame image data is stored in the frame memory 142. In the frame memory 143, for example, image data of the (N-2) th frame is stored. In the frame memory 144, for example, image data of the (N-1) th frame is stored. Each of the frame memories 141 to 144 holds the stored image data for at least time (2 × T). The value of the frame number N is +4 when the process described below is performed, and the same process is repeated.

<Control for N frames>
FIG. 5 is an enlarged view of a part of the reproduction timing exemplified in FIG. The control unit 171 (FIG. 4) reads out the Nth frame image data stored in the frame memory 141 at time t0. Image data read from the frame memory 141 is converted into an analog image signal by the D / A converter 151 and then input to the amplifier circuit 161. The amplifier circuit 161 amplifies the analog image signal for one frame with a common gain.

  For example, the control unit 171 switches the gain of the amplifier circuit 161 every time t1. When the frame interval T is set to 1/60 seconds and t1 is set to 1/360 seconds, the gain is switched 12 times during the time (2 × T). The control unit 171 sets the gain at the first time (time t0) to 0 among the 12 gain switching operations.

  The control unit 171 gradually increases the gain of the amplifier circuit 161 in the second (time ta) to seventh (time tf) gain switching so as to gradually increase the signal level of the reproduced image based on the N-th frame image data. Do up. The gain of the amplifier circuit 161 is set to 1.0 (corresponding to the maximum gain) by the gain switching at the seventh time (time tf).

  Thereafter, the control unit 171 gradually increases the gain circuit from the eighth time (time tg) to the twelfth time (time tk) so as to gradually lower the signal level of the reproduced image based on the Nth frame image data. 161 gain reduction is performed. The gain of the amplifying circuit 161 is set to 1/6 of the maximum by the gain switching at the 12th time (time tk).

<Control for (N + 1) frames>
Similarly, the control unit 171 (FIG. 4) reads the (N + 1) -th frame image data stored in the frame memory 142 at time tf. Image data read from the frame memory 142 is converted into an analog image signal by the D / A converter 152 and then input to the amplifier circuit 162. The amplifier circuit 162 amplifies the analog image signal for one frame with a common gain.

  The control unit 171 switches the gain of the amplifier circuit 162 every time t1. As in the case of the amplifier circuit 161, the gain is switched 12 times during the time (2 × T). The control unit 171 sets the gain at the first time (time tf) to 0 among the 12 gain switching operations.

  The control unit 171 increases the gain of the amplifier circuit 162 step by step so as to gradually increase the signal level of the reproduced image based on the (N + 1) -th frame image data. The gain of the amplification circuit 162 is set to 1.0 (corresponding to the maximum gain) by the gain switching at the seventh time (time t01).

  Thereafter, the control unit 171 performs gain reduction of the amplifier circuit 162 stepwise in the eighth to twelfth gain switching so as to gradually lower the signal level of the reproduced image based on the (N + 1) th frame image data. . The gain of the amplifying circuit 162 is reduced to 1/6 of the maximum by the twelfth gain switching.

  The adder 181 adds the analog image signals output from the amplifier circuit 161 and the amplifier circuit 162. The added image signal is output as a display signal via the adder 183. Note that the gains of the amplifier circuit 161 and the amplifier circuit 162 are adjusted in advance so as to be equal when both are set to the same gain. The adder may be configured by digital signal processing.

<Control for (N-2) frames>
The control unit 171 performs control similar to that of the amplifier circuits 161 and 162 for the amplifier circuits 163 and 164. The control unit 171 reads the (N-2) th frame image data stored in the frame memory 143, converts the image data into an analog image signal by the D / A converter 153, and inputs the analog image signal to the amplifier circuit 163. The amplifier circuit 163 amplifies the analog image signal for one frame with a common gain.

  The control unit 171 switches the gain of the amplifier circuit 163 every time t1. Also in this case, the gain is switched 12 times during the time (2 × T). The control unit 171 sets the gain at the first time to 0 among the 12 times of gain switching. Then, the gain of the amplifying circuit 163 is increased stepwise in the second to seventh gain switching so as to gradually increase the signal level of the reproduced image based on the (N-2) -th frame image data. The gain of the amplifier circuit 163 is set to 1.0 (corresponding to the maximum gain) by the seventh gain switching.

  Thereafter, the control unit 171 gradually reduces the gain of the amplifier circuit 163 in the eighth to twelfth gain switching so as to gradually lower the signal level of the reproduced image based on the (N−1) th frame image data. I do. The gain of the amplifier circuit 163 is set to 1/6 of the maximum gain by the 12th gain switching.

<Control for (N-1) frames>
The control unit 171 reads the (N−1) -th frame image data stored in the frame memory 144, converts the image data into an analog image signal by the D / A converter 154, and inputs the analog image signal to the amplification circuit 164. The amplifier circuit 164 amplifies the analog image signal for one frame with a common gain.

  The control unit 171 switches the gain of the amplifier circuit 164 every time t1. As in the case of the amplifier circuit 161, the gain is switched 12 times during the time (2 × T). The control unit 171 sets the gain at the first time to 0 among the 12 times of gain switching.

  The control unit 171 increases the gain of the amplifier circuit 164 step by step so as to gradually increase the signal level of the reproduced image based on the (N−1) th frame image data. The gain of the amplification circuit 164 is set to 1.0 (corresponding to the maximum gain) by the gain switching at the seventh time (time t0).

  Thereafter, the control unit 171 performs steps in gain switching from the 8th time (time ta) to the 12th time (time te) so as to gradually lower the signal level of the reproduced image based on the (N-1) th frame image data. Therefore, the gain of the amplifier circuit 164 is reduced. The gain of the amplifier circuit 164 is set to 1/6 of the maximum gain by the 12th gain switching.

  The adder 182 adds the analog image signals output from the amplifier circuit 163 and the amplifier circuit 164. The added image signal is output as a display signal via the adder 183. Note that the gains of the amplifier circuit 163 and the amplifier circuit 164 and the gains of the amplifier circuit 161 and the amplifier circuit 162 are adjusted in advance so as to be equal when they are set to the same gain.

  Through the control described above, the N frames of the display frame image are non-overlapping images of the frame at time t1 and overlapping images of time (T-t1), and the fade-out section of the frame image. And an image obtained by superimposing fade-in sections of the next frame image. The gain is controlled so that the signal level of the superimposed frame image becomes the average value of the two images that are the original frame images.

  The electronic camera 1 stops the reproduction display when the stop button constituting the operation member 18 is pressed. Specifically, the image signal having a higher gain is selected from the two frame image signals superimposed for the currently displayed frame image at the time when the stop operation is performed, and the image signal is amplified. The gain for amplifying the image signal whose gain is set low is set to 0. As a result, only the image based on the frame image signal having a gain of 1.0 is displayed in a non-overlapping manner, and the moving image reproduction display is stopped.

  If the gains of the two frame image signals superimposed for the currently displayed frame image at the time of the stop operation are the same, of the two frame image signals superimposed for the currently displayed frame image, Then, the image signal of the subsequent frame is selected, the gain for amplifying the image signal is set to 1.0, and the gain for amplifying the image signal of the previous frame is set to 0.

According to this embodiment, the following effects can be obtained.
(1) A section t1 in which only an image based on a frame image signal based on the image data of the Nth frame is displayed in a non-overlapping manner for the Nth frame when a high-speed continuous shot image is played back as a moving image, and a frame based on the Nth frame of image data An image signal and a section (T-t1) in which an image obtained by superimposing and synthesizing a frame image signal based on the image data of the next frame is displayed. By displaying so as to interpolate the non-exposure section (T-t1) at the time of high-speed continuous shooting, it is possible to smoothly reproduce a moving image while suppressing discontinuity (also referred to as a jerky feeling or a parallax feeling). Since frame image signals based on actually acquired image data are superimposed and synthesized, a subject image is not generated at a position different from a moving subject, unlike the conventional technique. Furthermore, since the subject extraction process and the prediction process are unnecessary, the processing load is light.

(2) In the overlapping display section (T-t1), since the sum of the gains for both frame image signals is set to 1.0, the frame image corresponding to the Nth frame in the non-overlapping display section t1 This is equivalent to the gain (1.0) for the signal. Thereby, the luminance fluctuation (flicker) of the reproduced image is suppressed, and reproduction can be performed so that the observer does not feel uncomfortable.

(3) In the overlapping display section (T-t1), the gain for the previous frame image signal is gradually decreased and faded out, and the gain for the subsequent frame image signal is gradually increased and faded in. Thereby, the interpolation display suitable for smooth moving image reproduction can be performed.

(4) When stopping the reproduction of the moving image, the frame image signal having a higher gain of the two frame image signals superimposed for the frame image being displayed at the time when the stop operation is performed The still image playback display is performed to display only the images by non-overlapping. Thus, the moving image reproduction display is stopped so that the observer does not feel a sense of incongruity, and then it is possible to shift to the still image reproduction display.

(Modification 1)
In the above description, an example has been described in which the gain of each amplifier circuit is switched 12 times during time (2 × T). The number of gain switching is not limited to 12 and may be increased. By increasing the number of gain switching times, it is possible to suppress the gain switching step per time and to finely control the gain control waveform.

(Modification 2)
The gain control waveform may be different from that in FIG. FIG. 6 is a diagram illustrating timing at which the electronic camera 1 according to the second modification reproduces and displays (smoothly reproduces) a high-speed continuous shot image.

  In FIG. 6, the electronic camera 1 starts the reproduction display when the reproduction button constituting the operation member 18 is pressed. The electronic camera 1 generates a first frame image signal based on the first frame image data read from the recording medium 30, and the second frame image based on the second frame image data read from the recording medium 30. Generate a signal. Each frame image signal is gained up (fade in) so as to gradually increase the signal level of the reproduced image, for example, at time (T / 2), and gradually increases the signal level of the reproduced image at subsequent time (T / 2). Gain is reduced to lower (fade out). Then, a fade-out section of the Nth frame image signal and a fade-in section of the (N + 1) th frame image signal are combined so as to overlap by time (T / 2) to generate a display frame image.

  That is, in the N frames of the display frame image, the first half is superimposed and displayed after adjusting the signal level of the (N-1) th frame image signal and the Nth frame image signal, and the second half is displayed. An image obtained by superimposing the Nth frame image signal and the (N + 1) th frame image signal after adjusting the signal level is superimposed and displayed. In FIG. 6, the entire band of the band indicating the display frame image represents a superimposed display section.

  The control unit 171 of the display image creation circuit 14 illustrated in FIG. 4 causes the amplification circuits 161 to 164 to perform gain switching according to the gain control waveform illustrated in FIG. Generate.

(Modification 3)
The gain control waveform is not limited to a linear function waveform. FIG. 7 is a diagram illustrating the timing at which the electronic camera 1 of Modification 3 reproduces and displays (smoothly reproduces) a high-speed continuous shot image.

  In FIG. 7, the electronic camera 1 starts reproduction display when a reproduction button constituting the operation member 18 is pressed. The electronic camera 1 generates a first frame image signal based on the first frame image data read from the recording medium 30, and generates a second frame image based on the second frame image data read from the recording medium 30. Generate a signal. Each frame image signal is gained up so as to increase the signal level of the reproduced image in a quadratic function, for example, at time (T / 2), and the signal level is maintained for the time (T / 2). / 2), the gain is reduced so as to lower the signal level of the reproduced image in a quadratic function. Then, a gain-down section of the Nth frame image signal and a gain-up section of the (N + 1) th frame image signal are combined so as to overlap by time (T / 2) to generate a display frame image. .

  That is, in N frames of a display frame image, only the image based on the Nth frame image signal is displayed in a non-overlapping manner in the first half, and the Nth frame image signal and the (N + 1) th frame image signal are signal levels in the second half. The superimposed image is displayed after adjustment. In the band indicating the frame image for display in FIG. 7, the black section represents the non-superimposed display section, and the gray section represents the superimposed display section.

  The control unit 171 of the display image creation circuit 14 illustrated in FIG. 4 causes the amplification circuits 161 to 164 to perform gain switching according to the gain control waveform illustrated in FIG. Generate.

(Modification 4)
In the above description, the case has been described in which the brightness of the images of each frame constituting the high-speed continuous shot image is uniform. When the brightness of the image is different between the frames, the gain of the amplification circuit that amplifies the frame image signal corresponding to the frame among the amplification circuits 161 to 164 may be individually adjusted. Thereby, it can prevent that the brightness | luminance of a reproduction | regeneration image fluctuates and gives an uncomfortable feeling to an observer.

(Modification 5)
Although an example in which the electronic camera 1 reproduces a moving image using high-speed continuous shot images has been described, the image reproducing device may be configured by causing a computer device to execute a moving image reproduction program. When a moving image reproduction program is used by being loaded into a personal computer, the program is loaded into a data storage device of the personal computer and then used as an image reproduction device by executing the program.

  The loading of the program to the personal computer may be performed by setting it on a recording medium personal computer such as a CD-ROM storing the program, or may be loaded on the personal computer by a method via a communication line such as a network. The moving image reproduction program can be supplied as various types of computer program products such as provision via a recording medium or a communication line.

  The above description is merely an example, and is not limited to the configuration of the above embodiment.

1 ... Electronic camera 11 ... Main CPU
14 ... Display image creation circuit 15 ... Buffer memory 16 ... Flash memory 19 ... Liquid crystal monitor 20 ... Video output circuit

Claims (8)

In an image processing apparatus that sequentially reproduces and displays an image group acquired for each of a plurality of frames having a predetermined frame interval at a predetermined reproduction frame interval in the acquisition order.
The image group includes a first image and a second image acquired at least in a first exposure time shorter than the frame interval, and acquired respectively in a first frame and a second frame adjacent to each other before and after,
An image processing apparatus comprising: a first display control unit that generates a reproduction frame image signal by superimposing the first image and the second image on at least a part of the reproduction frame. The image processing apparatus according to claim 1.
The first display control means superimposes the first image and the second image acquired in the first frame and the second frame, respectively, in a range excluding the first exposure time in the reproduction frame. An image processing apparatus for generating the reproduction frame image signal. The image processing apparatus according to claim 1.
The first display control means superimposes the first image and the second image acquired in the first frame and the second frame, respectively, over almost the entire area in the reproduction frame, and outputs the reproduction frame image signal. An image processing apparatus that generates the image processing apparatus. The image processing apparatus according to claim 1.
The first display control means superimposes the first image and the second image acquired in the first frame and the second frame, respectively, within a predetermined range in the reproduction frame, and outputs the reproduction frame image signal. An image processing apparatus that generates the image processing apparatus. In the image processing apparatus according to any one of claims 2 to 4,
The first display control means decreases the gain for the signal of the first image and increases the gain for the signal of the second image in a section in which the first image and the second image are overlapped. An image processing apparatus. The image processing apparatus according to claim 5.
The first display control means, when instructed to stop reproduction display, selects a signal of the image with the higher gain and generates a reproduction image signal for displaying the image as a still image. Image processing device. The image processing apparatus according to claim 6.
The first display control means selects the second image signal when the gains for the first image signal and the second image signal are the same, and generates a reproduction image signal for displaying a still image. A featured image processing apparatus. In the image processing device according to any one of claims 1 to 7,
The image group includes a third image and a fourth image acquired at a second exposure time substantially equal to the frame interval, and acquired at the third and fourth frames adjacent to each other before and after,
Second display control means for generating a frame image signal so as to sequentially switch the third image and the fourth image at the frame interval in the order of acquisition;
An image processing apparatus comprising: a switching control unit that causes one of the first display control unit and the second display control unit to generate a frame image signal in response to a switching instruction.

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