JP5891645B2 - Imaging apparatus and program - Google Patents

Description

  The present invention relates to an imaging apparatus and a program.

  Conventionally, a method of capturing an image for stereoscopic viewing with a single-lens camera is known. In this method, one image (first image) of the right-eye image and the left-eye image is captured for the first time, and then the camera is slid horizontally to right-eye image and left-eye image. The other image (second image) is taken for the second time.

  By the way, the impression of the stereoscopic image varies greatly depending on the distance (baseline length) from the lens position at the time of capturing the first image to the lens position at the time of capturing the second image. For example, if the baseline length is small, the stereoscopic effect is weak, but if the baseline length is large, the stereoscopic effect is strong. Therefore, when capturing a stereoscopic image, the baseline length must be set appropriately.

  In the first aspect of the present invention, there is provided an imaging apparatus that captures a right-eye image and a left-eye image for stereoscopic display, wherein the right-eye image is based on a shooting distance and a focal distance to a main subject. Determining a baseline length that is a distance in the left-right direction between the imaging position of the left-eye image and the imaging position of the left-eye image, and shifting the imaging position in the left-right direction by the baseline length determined by the determining unit An imaging unit that captures the image for the right eye and the image for the left eye, and the determination unit sets the baseline length to a larger value as the imaging distance increases, and sets the baseline length as the focal length increases. Provided are an imaging device that has a small value and sets the baseline length to be equal to or larger than a predetermined minimum setting distance regardless of the shooting distance and the focal length, and a program that is executed in such an imaging device.

  It should be noted that the above summary of the invention does not enumerate all the necessary features of the present invention. In addition, a sub-combination of these feature groups can also be an invention.

An example of an appearance of the imaging apparatus 10 according to the present embodiment as viewed from the front surface side, an imaging position of the first image, and an imaging position of the second image is shown. An example of an image displayed on the display unit 30 in each of the appearance viewed from the back side of the imaging device 10 according to the present embodiment and the imaging position of the first image and the imaging position of the second image is shown. 1 shows a functional configuration of an imaging apparatus 10 according to the present embodiment. 3 shows a processing flow of a stereoscopic shooting mode of the imaging apparatus 10 according to the present embodiment. The 1st example of the table which described the numerical value of the base line length with respect to the imaging distance and focal distance of a main subject is shown. The 2nd example of the table which described the numerical value of the base line length with respect to the imaging distance and focal distance of a main subject is shown. An example of the parallax angle of the subject located on the back side and the parallax angle of the subject located on the near side is shown. An example of the correction process by the correction unit 36 according to the present embodiment is shown. An example of the image for right eyes and the image for left eyes produced | generated by an image shift process is shown. An example of the direction mark 60 displayed on the display unit 30 of the imaging apparatus 10 according to the present embodiment is shown. An example of the appearance of the imaging device 10 in the vertical shooting state and the imaging positions of the first image and the second image are shown. The external appearance of the imaging device 10 of the modification which concerns on this embodiment is shown.

  Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. In addition, not all the combinations of features described in the embodiments are essential for the solving means of the invention.

  FIG. 1 shows an example of an appearance of an imaging device 10 according to the present embodiment as viewed from the front side, and an imaging position of a first image and an imaging position of a second image. The imaging device 10 according to the present embodiment captures a right eye image and a left eye image for stereoscopic display.

  The imaging device 10 according to the present embodiment has one lens unit 12. The imaging device 10 captures the first still image (first image) of the right-eye image and the left-eye image for the first time, and then moves the lens unit 12 in the left-right direction, for example, manually (slide). The other still image (second image) of the right-eye image and the left-eye image is captured a second time.

  Here, the distance in the left-right direction between the imaging position of the first image and the imaging position of the second image is referred to as a baseline length. The imaging apparatus 10 according to the present embodiment determines the baseline length after the first image is captured and before the slide, and specifies the imaging position of the second image.

  FIG. 2 shows an example of an appearance viewed from the back side of the imaging device 10 according to the present embodiment and an image displayed on the display unit 30 at each of the first image capturing position and the second image capturing position. .

  The imaging device 10 includes a display unit 30 on the back side. The display unit 30 displays a through image representing a real-time image of the shooting range in normal shooting. The user captures a still image by setting the angle of view and various camera parameters while confirming the through image.

  Here, in the stereoscopic shooting mode, the imaging device 10 first captures a first image according to the operation of the user pressing the shutter button. Subsequently, after imaging the first image, the imaging device 10 predicts and generates a predicted image of the second image from the first image, and displays the generated predicted image superimposed on the through image. Thereby, the imaging device 10 notifies the user of the imaging position of the first image, and can slide the imaging device 10 to an appropriate position.

  Then, the imaging device 10 automatically captures the second image in response to the fact that the through image and the predicted image match as a result of the user sliding the main body of the imaging device 10. In this way, the imaging device 10 can capture the second image at an appropriate position.

  FIG. 3 shows a functional configuration of the imaging apparatus 10 according to the present embodiment. The imaging device 10 includes an imaging unit 20, a table storage unit 22, a determination unit 24, a temporary storage unit 26, a predicted image generation unit 28, a display unit 30, a coincidence detection unit 32, and a shutter instruction unit 34. , A correction unit 36, a shift unit 38, and an output unit 40.

  The imaging unit 20 captures a subject and generates a still image. Further, in the stereoscopic imaging mode, the imaging unit 20 first captures one of the right-eye image and the left-eye image (first image), subsequently determines the baseline length, and then continues to the right The other image (second image) of the eye image and the left eye image is captured. Thereby, the imaging unit 20 can capture the right-eye image and the left-eye image by shifting the imaging position in the left-right direction by the baseline length determined by the determination unit 24.

  The table storage unit 22 stores a table in which values of base line lengths that are determined in advance for each correspondence between the shooting distances and the focal lengths are stored. The contents of the table will be described with reference to FIGS.

  The determination unit 24 acquires from the imaging unit 20 the shooting distance and the focal distance to the main subject when the first image is captured. The determination unit 24 determines the baseline length based on the shooting distance and the focal distance to the main subject. More specifically, the determination unit 24 refers to the table stored in the table storage unit 22 and determines a baseline length corresponding to the shooting distance and the focal length to the main subject.

  The temporary storage unit 26 temporarily stores the first image captured by the imaging unit 20. In other words, the temporary storage unit 26 stores the first image from when the first image is captured until the second image is captured.

  The predicted image generation unit 28 shifts the first image in the left-right direction by the shift amount corresponding to the baseline length determined by the determination unit 24 to generate a predicted image of the second image. The predicted image generation unit 28 may generate only a part of the first image such as the partial image of the main subject, instead of generating the predicted image of the second image for the entire angle of view.

  The display unit 30 synthesizes and displays the through image and the predicted image between the time when the first image is captured and the time when the second image is captured. Then, the display unit 30 displays a combined image obtained by combining the through image and the predicted image on the display surface.

  The coincidence detection unit 32 detects whether the through image coincides with the predicted image after the first image is captured. More specifically, the coincidence detection unit 32 detects whether the through image and the predicted image coincide with each other with a predetermined degree of coincidence. For example, the coincidence detection unit 32 compares the through image and the predicted image for each pixel unit, and if the through image pixel and the predicted image pixel coincide with each other at a predetermined ratio, the coincidence is detected. Judge that

  The shutter instruction unit 34 gives an imaging instruction to the imaging unit 20 in response to the user's operation of pressing the shutter button. Accordingly, the shutter instruction unit 34 can cause the imaging unit 20 to capture the first image in response to the user pressing the shutter button.

  In addition, after the first image is captured, the shutter instruction unit 34 gives an imaging instruction to the imaging unit 20 in accordance with the fact that the through image matches the predicted image. Accordingly, the shutter instruction unit 34 can cause the imaging unit 20 to capture the second image in response to the imaging unit 20 matching the through image with the predicted image.

  After the second image is captured, the correction unit 36 selects the right-eye image that is one of the first image and the second image, and the left-eye image that is the other of the first image and the second image. to correct. For example, the correction unit 36 corrects a vertical shift and a rotational shift between the right-eye image and the left-eye image that are generated by a manual slide operation.

  The shift unit 38 shifts the right-eye image and the left-eye image corrected by the correction unit 36 in the left-right direction by a predetermined number of pixels, and separates the right-eye image and the left-eye image in the left-right direction. Let The shift unit 38 shifts the pixels of the right eye image and the left eye image in the left-right direction by the same number of pixels.

  The output unit 40 outputs the right-eye image and the left-eye image shifted by the shift unit 38 as a stereoscopic display image file in a predetermined format. The output unit 40 stores the filed image data in a memory card or the like.

  FIG. 4 shows a processing flow in the stereoscopic shooting mode of the imaging apparatus 10 according to the present embodiment. The imaging apparatus 10 executes the processes of Steps S11 to S25 illustrated in FIG. 4 in the stereoscopic shooting mode.

  First, the shutter instruction unit 34 determines whether or not the user has pressed the shutter button (step S11). When the shutter button is not pressed (No in step S11), the shutter instruction unit 34 displays the through image while sequentially updating it, and waits for processing until the shutter button is pressed (S12).

  When the shutter button is pressed by the user (Yes in step S11), the imaging unit 20 captures one of the predetermined images (first image) of the right-eye image and the left-eye image (first image) ( Step S13). Subsequently, the temporary storage unit 26 temporarily stores the first image captured by the imaging unit 20 (S14).

  Subsequently, the determination unit 24 acquires the shooting distance and focal length of the main subject from the imaging unit 20 (step S15). For example, the determination unit 24 acquires the distance from the imaging device 10 to the focused subject as the shooting distance.

  Subsequently, the determination unit 24 determines the base line length with reference to the table stored in the table storage unit 22 based on the photographing distance to the main subject and the focal length (step S16). The contents of the table will be described with reference to FIGS.

  Subsequently, the predicted image generation unit 28 shifts the first image in the left-right direction by the number of pixels corresponding to the determined baseline length, and generates a predicted image of the second image (step S17). That is, the predicted image generation unit 28 generates a predicted image of an image captured from a position slid by the baseline length in the horizontal direction from the imaging position of the first image by shifting each pixel of the first image in the horizontal direction. .

  Note that the predicted image generation unit 28 shifts the first image in a predetermined direction. For example, when the first image is an image for the right eye, the predicted image generation unit 28 generates the predicted image by shifting the first image to the right side. In addition, as an example, when the first image is a left-eye image, the predicted image generation unit 28 generates the predicted image by shifting the first image to the left side. In addition, the predicted image generation unit 28 may use an image of a part of a subject (for example, a main subject) in the screen as a predicted image instead of the predicted image of the entire screen to be displayed.

  Subsequently, the display unit 30 generates and displays a combined image obtained by combining the through image and the predicted image (step S18). In this case, the display unit 30 gives transparency to the predicted image and overwrites it on the through image for display. And even if the imaging position by the imaging part 20 moves, the display part 30 continues displaying a prediction image in the position fixed with respect to the display surface. Thereby, the display part 30 can make a user recognize whether the imaging position by the imaging part 20 is approaching the position (namely, imaging position of a 2nd image) which can image a prediction image.

  Subsequently, the coincidence detection unit 32 detects whether the through image coincides with the predicted image (step S19). More specifically, the coincidence detection unit 32 detects whether the through image and the predicted image coincide with each other with a predetermined degree of coincidence. For example, the coincidence detection unit 32 compares the through image and the predicted image for each pixel unit, and if the through image pixel and the predicted image pixel coincide with each other at a predetermined ratio, the coincidence is detected. Judge that

  If it is not determined that the through image and the predicted image match (No in step S19), then the shutter instruction unit 34 determines whether the shutter button is forcibly pressed by the user (step S20). ). When the shutter button is not pressed (No in step S20), the shutter instruction unit 34 displays a composite image obtained by combining the through image and the predicted image while sequentially updating the through image (step S21) (step S18). ), And waits for processing until the through image and the predicted image match.

  When it is determined that the through image matches the predicted image (Yes in step S19), the imaging unit 20 determines the other predetermined image (second image) of the right eye image and the left eye image. ) Is imaged (step S22). That is, the imaging unit 20 shifts the first image in the left-right direction by the shift amount corresponding to the baseline length, and the predicted image of the second image and the through image representing the real-time image of the imaging range of the imaging unit 20 are obtained. A second image is captured in response to the match. Thereby, the imaging device 10 can automatically capture the second image only by the user sliding the imaging device 10.

  Even if it is determined that the through image and the predicted image do not match (No in step S19), if the shutter button is forcibly pressed by the user (Yes in step S20), the imaging unit 20 captures the second image (step S22). Thereby, the imaging device 10 can forcibly capture the second image with its own intention without waiting for the second image to be automatically captured.

  Subsequently, the correcting unit 36 corrects the right-eye image that is one of the first image and the second image, and the left-eye image that is the other of the first image and the second image (step S23). . For example, the correcting unit 36 corrects the vertical shift and the rotational shift of the right-eye image and the left-eye image.

  Subsequently, the shift unit 38 shifts the corrected right-eye image and left-eye image as a whole in the left-right direction by a predetermined number of pixels, and the right-eye image and the left-eye image are shifted in the left-right direction. Separate (step S24). For example, the shift unit 38 shifts the position of each pixel of the right-eye image to the right by ½ of a predetermined number of pixels. In addition, as an example, the shift unit 38 shifts the position of each pixel of the left-eye image to the left by a half of the predetermined number of pixels.

  Thereby, the shift unit 38 can provide a stereoscopic image with a sense of depth. Note that the shift unit 38 may change the number of pixels to be shifted left and right for each image according to the shooting distance, the focal length, the baseline length, and the like.

  Subsequently, the output unit 40 outputs the right-eye image and the left-eye image shifted by the shift unit 38 as a stereoscopic display image file in a predetermined format (step S25). As an example, the output unit 40 cuts out image data in the display range from each of the right-eye image and the left-eye image, or performs predetermined compression processing encoding processing or the like to form a file.

  In this case, the output unit 40 may cut out the image data with a corresponding size when the aspect ratio of the monitor that displays the stereoscopic image is acquired in advance. For example, when it is acquired in advance that the monitor to be displayed has a ratio of 4: 3, the output unit 40 cuts out and generates image data with an aspect ratio of 4: 3. For example, if the monitor to be displayed has previously acquired that the ratio is 16: 9, the output unit 40 cuts out and generates image data having an aspect ratio of 16: 9. Then, the output unit 40 stores the image data filed in this way in a memory card or the like.

  As described above, according to the imaging device 10, it is possible to capture a subject image formed by one lens unit 12 at different timings and generate a right eye image and a left eye image. Moreover, according to the imaging device 10, since the baseline length is set according to the shooting distance and the focal length, it is possible to capture a stereoscopic image with an appropriate stereoscopic effect.

  5 and 6 show an example of a table in which numerical values of the base line length with respect to the shooting distance and the focal length of the main subject are described. 5 and 6, each numerical value in the table represents a base line length. The unit of the numerical values in FIG. 5 is centimeters. The unit of the numerical value on the left side of FIG. 6 is centimeter, and the numerical value on the right side represents the number of pixels corresponding to the baseline length on the display screen having a predetermined size.

  As an example, the determination unit 24 refers to a table as shown in FIG. 5 or a table as shown in FIG. 6 to determine the baseline length based on the photographing distance (L) and the focal distance (f).

  In these tables, the base line length that is larger as the shooting distance is larger is described. Accordingly, if the focal length is the same, the determination unit 24 sets the baseline length to a larger value as the shooting distance increases. Thus, the determination unit 24 increases the baseline length as the subject is farther, and gives a greater stereoscopic effect to the far subject.

  Also, in these tables, the base line length that is smaller as the focal length is larger is described. Therefore, if the shooting distance is the same, the determination unit 24 sets the baseline length to a smaller value as the focal length increases. Thereby, when enlarging and photographing, the determination unit 24 can reduce the baseline length so as not to give excessive parallax.

  Further, in these tables, a base line length that is equal to or longer than the minimum set distance is described regardless of the shooting distance and the focal distance. Therefore, the determination unit 24 sets the baseline length to be equal to or greater than the minimum set distance regardless of the shooting distance and the focal distance. Thereby, the determination unit 24 can avoid that the main body of the imaging device 10 is slightly displaced due to camera shake and the second image is unintentionally captured and a stereoscopic image with poor accuracy is generated. .

  Note that the minimum set distance is preferably a distance larger than the amount of movement caused by camera shake. When applied to a compact digital camera, the minimum set distance is 0.5 cm as an example.

  In addition, the determination unit 24 may set the baseline length as the minimum set distance regardless of the focal length when the shooting distance is equal to or less than a predetermined first reference distance. The first reference distance is a shooting distance in which the influence of a slight deviation of the main body due to camera shake greatly affects a shot image, for example, 0.1 m. Thereby, the determination unit 24 can avoid that the main body of the imaging device 10 is slightly displaced due to camera shake and the second image is unintentionally captured and a stereoscopic image with poor accuracy is generated. .

  Furthermore, in these tables, the base line length that is not more than the maximum set distance is described regardless of the shooting distance and the focal distance. Therefore, the determination unit 24 sets the baseline length to be equal to or less than the maximum set distance regardless of the shooting distance and the focal distance. Thereby, the determination part 24 can avoid that the subject of the shift amount more than the assumed distance will be imaged. When applied to a compact digital camera, the maximum set distance is 3 cm as an example.

  Further, the determination unit 24 may set the baseline length as the maximum set distance regardless of the focal length when the shooting distance is equal to or greater than a predetermined second reference distance. The second reference distance is larger than the first reference distance. For example, the second reference distance is a shooting distance at which a subject having a shift amount greater than or equal to an assumed distance may be captured, for example, 2 m. Thereby, the determination part 24 can avoid that the subject of the shift amount more than the assumed distance will be imaged.

  Furthermore, in these tables, a baseline length that is equal to or greater than a predetermined minimum number of pixels on the image sensor or a predetermined size display screen is described regardless of the shooting distance and the focal length. Yes. Therefore, the determination unit 24 sets the base line length to be equal to or larger than the predetermined minimum number of pixels on the image sensor or on a display screen having a predetermined size regardless of the shooting distance and the focal distance.

  Thereby, the determination part 24 can recognize the difference between the image for right eyes, and the image for left eyes, and can produce | generate the image which can be made to feel at least a three-dimensional effect. When applied to a compact digital camera including an image sensor equivalent to a full size of 35 mm, as an example, the minimum number of pixels is 10 pixels on a display screen having a horizontal size of 640 pixels.

  Instead, in these tables, a base line length corresponding to a length equal to or more than a predetermined ratio with respect to the length in the left-right direction on the image sensor is described regardless of the shooting distance and the focal length. May be. In this case, the determination unit 24 sets the base line length to a value corresponding to a length equal to or greater than a predetermined ratio with respect to the length in the left-right direction on the image sensor regardless of the shooting distance and the focal length.

  Thereby, the determination part 24 can recognize the difference between the image for right eyes, and the image for left eyes, and can produce | generate the image which can be made to feel at least a three-dimensional effect. When applied to a compact digital camera equipped with an image sensor equivalent to a full size of 35 mm, the predetermined ratio is 3% as an example.

  As described above, the determination unit 24 refers to a preset table and determines an appropriate baseline length based on the shooting distance and the focal distance. Then, the determination unit 24 limits the range of the baseline length so that an image is not automatically captured due to a shift due to camera shake or an image is captured with a baseline length that is longer than expected. Thereby, according to the imaging device 10 which concerns on this embodiment, the image for right eyes and the image for left eyes can be imaged with appropriate base line length.

  The table storage unit 22 may store a plurality of types of tables associated with the shooting modes of the imaging device 10. As an example, the table storage unit 22 may store a table corresponding to a mode for specifying a main shooting target, such as a landscape shooting mode, a close-up mode, and a telephoto mode. Then, the determination unit 24 may determine the baseline length with reference to the table corresponding to the imaging mode among the plurality of tables stored in the table storage unit 22. Thereby, the determination unit 24 can perform stereoscopic shooting with a more appropriate baseline length according to the main subject.

  FIG. 7 shows an example of the parallax angle of the subject located on the back side and the parallax angle of the subject located on the near side. In capturing a stereoscopic image including at least two subjects, the determination unit 24 sets the difference between the parallax angles of the two subjects when the right-eye image and the left-eye image are displayed within a predetermined range. The base line length may be determined.

For example, assume that a stereoscopic image including two subjects with different shooting distances is shot. Here, an angle formed by a straight line a ₁ connecting the imaging position of the left-eye image and the subject A and a straight line a ₂ connecting the imaging position of the right-eye image and the subject A is a convergence angle α. Also, an angle formed by a straight line b ₁ connecting the imaging position of the left eye image and the subject B and a straight line b ₂ connecting the imaging position of the right eye image and the subject B is defined as a convergence angle β. In this case, the parallax angle between the subject A and the subject B is β−α.

  The determination unit 24 sets the parallax angle (β−α) between the subject A on the back side and the subject B on the near side to be within a predetermined angle range (difference in parallax angle is within ± 1 °). Set the baseline length. For example, the determination unit 24 calculates the difference in parallax angle by acquiring the shooting distance of each subject from the imaging unit 20.

  When the base line length determined with reference to the table is outside the predetermined range, the determining unit 24 reduces the base line length so that it is within this range. The imaging device 10 can capture an image with a difference in parallax angle suitable for stereoscopic viewing by adjusting the baseline length in this way.

  FIG. 8 shows an example of correction processing by the correction unit 36 according to the present embodiment. When the second image is picked up by manually sliding in the left-right direction after taking the first image, the second image is shifted in the up-down direction with respect to the first image without being able to slide accurately in the left-right direction. There is. Further, when the first image and the second image are captured, the image may be tilted in the plane due to camera shake or the like.

  The correction unit 36 compares the right-eye image and the left-eye image and corrects the right-eye image and the left-eye image to be shifted in the vertical direction when the imaging position is shifted in the vertical direction. In addition, when the right-eye image and the left-eye image are captured in the in-plane direction, the correction unit 36 corrects the right-eye image and the left-eye image in a direction that rotates in the plane. Furthermore, the correction unit 36 is not limited to such correction, and may perform correction by other image processing.

  Here, there may be a difference between the right-eye image and the left-eye image that cannot be corrected by correction processing. In such a case, the correction unit 36 warns the user that an image suitable for stereoscopic viewing cannot be generated. Thereby, the correction | amendment part 36 can make a user image | photograph again.

  Further, even when such a shift that cannot be corrected occurs, the correction unit 36 may perform processing for storing only one of the right-eye image and the left-eye image. Thereby, the correction | amendment part 36 can record a two-dimensional image at least. In this case, as an example, the correction unit 36 may store an image captured first (that is, the first image), or may store an image determined to have higher quality.

  FIG. 9 shows an example of an image for the right eye and an image for the left eye generated by the image shift process. In addition, when there is a difference between the right-eye image and the left-eye image that cannot be corrected by the correction process, the correction unit 36 selects one of the right-eye image and the left-eye image from the other. You may perform the process which produces | generates.

  For example, as illustrated in FIG. 9, the correction unit 36 may shift the left-eye image from the left-eye image in the right direction by a predetermined shift amount to generate the right-eye image. . Further, the correction unit 36 may generate the left-eye image by shifting the right-eye image in the left direction by a predetermined shift amount from the right-eye image. In this case, for example, the correction unit 36 may generate the other based on the previously captured image (i.e., the first image), or the other based on the image determined to be of higher quality. It may be generated.

  Accordingly, the correction unit 36 can generate an image file that can be at least stereoscopically viewed even when shooting of either the right-eye image or the left-eye image fails.

  FIG. 10 shows an example of the direction mark 60 displayed on the display unit 30 of the imaging apparatus 10 according to the present embodiment. The display unit 30 may display a direction mark 60 that indicates a direction in which the imaging device should be moved from when the first image is captured until the second image is captured.

  Thereby, the imaging device 10 can make a user understand whether the imaging device 10 should just slide to the right direction, or should slide to the left direction. In particular, the imaging apparatus 10 can inform the user in which direction the subject should be moved even if the main subject is not included in the through image due to excessive movement.

  In addition, the display unit 30 displays the predicted image after image conversion using the first color filter, and displays the through image after image conversion using the second color filter that is complementary to the first color. Also good. Thereby, the display unit 30 can show the subject of the actual color to the user in response to the through image matching the predicted image.

  FIG. 11 shows an example of the appearance of the imaging device 10 in the vertical shooting state and the imaging positions of the first image and the second image. The imaging device 10 may further include a direction sensor 70. The direction sensor 70 detects whether the imaging device 10 is in a horizontal shooting state or a vertical shooting state. Furthermore, the direction sensor 70 detects whether the right side is positioned downward or the left side is positioned downward in the vertical shooting state.

  Then, the imaging unit 20 switches and outputs the captured image data in the left-right direction depending on whether in the horizontal shooting state, the vertical shooting state with the right side down, or the vertical shooting state with the left side down. Thereby, the imaging device 10 can capture a stereoscopic image in any state.

  Furthermore, the determination unit 24 switches the baseline length depending on whether the camera is in the horizontal shooting state or the vertical shooting state. More specifically, the determination unit 24 shortens the baseline length in the vertical shooting state than in the horizontal shooting state. In a normal case, the display monitor is horizontally long, and thus an image captured in the vertical shooting state is reduced and displayed. Accordingly, the determination unit 24 shortens the baseline length in the vertical shooting state by a proportion corresponding to the reduction ratio, rather than the baseline length in the horizontal shooting state.

  Further, the predicted image generation unit 28 switches the shift direction of the first image for generating the predicted image according to the vertical shooting state where the right side is the lower side or the vertical shooting state where the left side is the lower side. Accordingly, the predicted image generation unit 28 selects the first image as either the right-eye image or the left-eye image regardless of whether the right-side side is the vertical shooting state on the lower side or the left-side side is the lower vertical shooting state. It is possible to capture images while being fixed to.

  FIG. 12 shows an appearance of an imaging apparatus 10 according to a modification according to the present embodiment. The imaging device 10 according to this modification includes two right and left lens units 12 (12-R, 12-L). The imaging device 10 according to this modification can simultaneously capture a right-eye image and a left-eye image.

  Furthermore, in the imaging apparatus 10 according to this modification, one lens unit 12 (for example, the lens unit 12-L) can move in the left-right direction. One movable lens unit 12 adjusts the distance between the two lens units 12 determined by the determining unit 24.

  Then, after adjusting the baseline length, the imaging apparatus 10 according to the present modification images the right eye image and the left eye image simultaneously. Thereby, the imaging device 10 according to the present modification can capture a stereoscopic image with an appropriate baseline length according to the shooting distance and the focal length.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

  The order of execution of each process such as operations, procedures, steps, and stages in the apparatus, system, program, and method shown in the claims, the description, and the drawings is particularly “before” or “prior to”. It should be noted that the output can be realized in any order unless the output of the previous process is used in the subsequent process. Regarding the operation flow in the claims, the description, and the drawings, even if it is described using “first”, “next”, etc. for convenience, it means that it is essential to carry out in this order. It is not a thing.

DESCRIPTION OF SYMBOLS 10 imaging device, 12 lens part, 20 imaging part, 22 table memory | storage part, 24 determination part, 26 temporary storage part, 28 prediction image generation part, 30 display part, 32 coincidence detection part, 34 shutter instruction | indication part, 36 correction | amendment part, 38 shift unit, 40 output unit, 60 direction mark, 70 direction sensor

Claims (22)

An imaging device that captures a right-eye image and a left-eye image for stereoscopic display,
A determination unit that determines a base line length that is a distance in the left-right direction between the imaging position of the right-eye image and the imaging position of the left-eye image, based on a shooting distance and a focal distance to the main subject;
An imaging unit that captures the right-eye image and the left-eye image by shifting the imaging position in the left-right direction by the baseline length determined by the determination unit;
With
The determination unit
The larger the shooting distance, the larger the baseline length, the larger the focal length, the smaller the baseline length,
When the shooting distance is equal to or less than the first reference distance, the baseline length is set to a predetermined minimum set distance regardless of the focal length.
Imaging device.   An imaging device that captures a right-eye image and a left-eye image for stereoscopic display,
  A determination unit that determines a base line length that is a distance in the left-right direction between the imaging position of the right-eye image and the imaging position of the left-eye image, based on a shooting distance and a focal distance to the main subject;
  An imaging unit that captures the right-eye image and the left-eye image by shifting the imaging position in the left-right direction by the baseline length determined by the determination unit;
  With
  The determination unit is
  The larger the shooting distance, the larger the baseline length, the larger the focal length, the smaller the baseline length,
  Regardless of the shooting distance and the focal length, the baseline length is set to a predetermined minimum set distance or more,
In the case where the shooting distance is equal to or greater than a second reference distance, the base line length is set to a predetermined maximum set distance regardless of the focal length.
  Imaging device.   An imaging device that captures a right-eye image and a left-eye image for stereoscopic display,
  A determination unit that determines a base line length that is a distance in the left-right direction between the imaging position of the right-eye image and the imaging position of the left-eye image, based on a shooting distance and a focal distance to the main subject;
  An imaging unit that captures the right-eye image and the left-eye image by shifting the imaging position in the left-right direction by the baseline length determined by the determination unit;
  With
  The determination unit is
Determining the baseline length with reference to a table in which a value of a predetermined baseline length is described for each correspondence between each of the shooting distances and each of the focal lengths;
The baseline length is determined with reference to a table corresponding to a set imaging mode among a plurality of tables associated with each imaging mode of the imaging device.
  Imaging device.   An imaging device that captures a right-eye image and a left-eye image for stereoscopic display,
  A determination unit that determines a base line length that is a distance in the left-right direction between the imaging position of the right-eye image and the imaging position of the left-eye image, based on a shooting distance and a focal distance to the main subject;
  A first image that is one of the right-eye image and the left-eye image is captured, and the imaging device corresponds to the baseline length determined by the determination unit from the imaging position of the first image In response to detecting the movement in the left-right direction by a distance, a second image that is the other of the right-eye image and the left-eye image is captured, and the first image corresponds to the baseline length An imaging unit that captures the second image in response to a match between the predicted image of the second image generated by shifting in the left-right direction by the amount of shift and the through image representing the real-time image of the imaging range; ,
  A display unit that synthesizes and displays the through image and the predicted image during a period from when the first image is captured to when the second image is captured;
  With
  The determination unit is
  The larger the shooting distance, the larger the baseline length, the larger the focal length, the smaller the baseline length,
  Regardless of the shooting distance and the focal length, the baseline length is set to a predetermined minimum set distance or more,
  The display unit displays the predicted image after image conversion using a first color filter, and displays the through image after image conversion using a second color filter that is complementary to the first color. ,
  Imaging device.   An imaging device that captures a right-eye image and a left-eye image for stereoscopic display,
  A determination unit that determines a base line length that is a distance in the left-right direction between the imaging position of the right-eye image and the imaging position of the left-eye image, based on a shooting distance and a focal distance to the main subject;
  An imaging unit that captures the right-eye image and the left-eye image by shifting the imaging position in the left-right direction by the baseline length determined by the determination unit;
  With
  The determination unit is
  The larger the shooting distance, the larger the baseline length, the larger the focal length, the smaller the baseline length,
  Regardless of the shooting distance and the focal length, the baseline length is set to a predetermined minimum set distance or more,
  In capturing a stereoscopic image including at least two subjects, the base line is set so that a difference in parallax angle between the two subjects when the right-eye image and the left-eye image are displayed is within a predetermined range. Determine the length,
  Imaging device. 6. The imaging according to claim 2 , wherein the determination unit sets the base line length as the minimum set distance regardless of the focal length when the shooting distance is equal to or less than a first reference distance. 7. apparatus. The imaging device according to any one of claims 1 to 6, wherein the determination unit sets the baseline length to a predetermined maximum set distance or less regardless of the shooting distance and the focal distance. The determination unit, when the shooting distance is not less than the second reference distance, in any one of claims 1 and 3 to 5 and the maximum set distance which the focal length defined the base length in advance regardless The imaging device described. The determination unit does not depend on the object distance and the focal length, either a base length of claims 1 to predetermined or more number of pixels on the display screen of size defined imaging device on or pre-8 The imaging apparatus according to item 1. The determination unit sets the base line length to a value corresponding to a length greater than or equal to a predetermined ratio with respect to the length in the left-right direction on the image sensor regardless of the shooting distance and the focal length. The imaging device according to any one of 8 . The imaging device according to any one of claims 1 to 10 , further comprising a shift unit that separates the right-eye image and the left-eye image in the left-right direction by a predetermined number of pixels. The said determination part determines the said base line length with reference to the table in which the value of the base line length predetermined for every correspondence with each of the said imaging distance and each of the said focal distance was described . The imaging apparatus according to any one of 4 and 5 . The imaging device according to claim 12 , wherein the determination unit determines the baseline length with reference to a table corresponding to a set imaging mode among a plurality of tables associated with each imaging mode of the imaging device. . The imaging unit
Capturing a first image that is one of the right-eye image and the left-eye image;
The other of the right-eye image and the left-eye image in response to detecting from the imaging position of the first image that the imaging device has moved in the left-right direction by a distance corresponding to the baseline length. the imaging apparatus according to any one of claims 1 to 3 and 5 for capturing a second image is. The imaging unit is a predicted image of a second image generated by shifting the first image in the horizontal direction by a shift amount corresponding to the baseline length, and a through image representing a real-time image of the imaging range of the imaging unit. DOO imaging apparatus according to claim 1 4 for imaging the second image in response to the occurrence of a match. In Until imaging the second image from the image the first image pickup apparatus according to claim 1 5, further comprising a display unit for displaying by synthesizing said predicted image and the through image. The imaging unit according to claim 4 or 16 , wherein the display unit displays a direction mark indicating a direction in which the imaging apparatus is to be moved during a period from when the first image is captured until the second image is captured. apparatus. The display unit displays the predicted image after image conversion using a first color filter, and displays the through image after image conversion using a second color filter that is complementary to the first color. The imaging device according to any one of claims 4, 16, and 17 . In the imaging of a stereoscopic image including at least two subjects, the determination unit determines a difference in parallax angle between the two subjects when the right-eye image and the left-eye image are displayed within a predetermined range. The imaging apparatus according to any one of claims 1 to 4 , wherein the base line length is determined so as to. The determination section, the base line length, which is determined based on the photographing distance and the focal distance to the main subject, according to claim 5 or 19 further adjusted to within a pre-determined range of the parallax angle Imaging device. The determination unit is configured so that a difference between a parallax angle of a subject displayed on the front side of the display surface and a parallax angle of a subject displayed on the back side of the display surface is within a predetermined range. The imaging device according to any one of claims 5, 19 and 20, wherein a base line length is determined. A program that is executed by an imaging apparatus that images a subject and functions as the imaging apparatus according to any one of claims 1 to 21 .

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