JP2006162991A - Stereoscopic image photographing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stereoscopic image photographing apparatus capable of simply correcting a magnification error or an optical axis deviation due to individual difference between two variable power lenses and capable of obtaining a suitable stereoscopic image. <P>SOLUTION: A stereoscopic camera 2 is provided with: first and second potentiometers 25, 35 for detecting the positions of the first and second variable power lenses 21, 31; a correction data storage part 52 for storing a magnification difference D1 between the first and second variable power lenses 21, 31 on each prescribed position; an electronic variable power circuit 53 for electronically changing the magnification of second image data based on the magnification difference D1; and a CPU 40 for reading out the magnification difference D1 corresponding to the detected positions of the potentiometers 25, 35 from the correction data storage part 52 and setting the read magnification difference D1 in the electronic variable power circuit 53 to make the photographing ranges of the first and second image data coincide with each other. The stereoscopic camera 2 is also provided with a coordinate changing circuit for storing an optical axis coordinate difference between the first and second variable power lenses 21, 31 in the correction data storage part 52 and changing the coordinates of the second image data based on the optical axis coordinate difference. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a stereoscopic image capturing apparatus including two imaging units.

  In recent years, digital cameras have become widespread. The digital camera includes an imaging unit including a focus lens, an image sensor, and the like, and image data acquired by the imaging unit is digitized and recorded on an information recording medium such as a memory card. Among such digital cameras, a two-lens stereoscopic camera configured to capture a subject with two left and right imaging units corresponding to both eyes and obtain a stereoscopic image from the two captured left and right image data. In addition, there is known one in which a variable power lens is incorporated in each imaging unit (see Patent Documents 1 and 2).

Patent Document 1 proposes a device that corrects and controls the operation state of the variable power lens driving mechanism for each operation direction in order to eliminate the magnification error of the left and right imaging units. In order to eliminate the deviation of the optical axis, an apparatus for correcting and controlling the angle at which the zoom lens is attached has been proposed.
JP-A-9-133852 JP-A-5-130646

  However, even if the same zoom lens is provided in the two left and right imaging units in the conventional stereoscopic camera, there are not a few individual differences between the two zoom lenses, so that magnification error and optical axis misalignment still occur. In other words, there is a problem in that a shooting range and optical axis coordinates of two image data obtained by shooting are shifted, and if these are directly combined with a stereoscopic image, an appropriate stereoscopic image cannot be obtained.

  The present invention has been made to solve the above-described problem, and a stereoscopic image that can easily correct a magnification error and an optical axis shift due to individual differences between two variable power lenses and obtain an appropriate stereoscopic image. It aims at providing an imaging device.

  In order to achieve the above object, a stereoscopic image capturing apparatus of the present invention includes a first imaging unit that has a first variable magnification lens that is driven along an optical axis, and acquires first image data, along the optical axis. And a second imaging unit that has a second variable magnification lens that is driven in conjunction with the first variable magnification lens to acquire second image data. Position detection means for detecting the position of the double lens, storage means for storing the magnification difference between the first and second variable power lenses for each predetermined position, and the second image data electronically based on the magnification difference Electronic scaling means for scaling, and control means for reading out a magnification difference corresponding to the position detected by the position detecting means from the storage means and setting the difference in the electronic scaling means, the first and second Characterized by matching the shooting range of image data A.

  In addition, the stereoscopic image capturing apparatus of the present invention includes a first imaging unit that has a first variable magnification lens driven along the optical axis and acquires first image data, and the first variable magnification along the optical axis. A stereoscopic image capturing apparatus including a second imaging lens that has a second variable magnification lens driven in conjunction with the lens and acquires second image data, and detects a position of the first or second variable magnification lens Position detecting means, storage means for storing the optical axis coordinate difference between the first and second zoom lenses for each predetermined position, and coordinates for changing the coordinates of the second image data based on the optical axis coordinate difference Changing means, and control means for reading out the optical axis coordinate difference corresponding to the position detected by the position detecting means from the storage means and setting the difference in the coordinate changing means, and the light of the first and second image data The feature is that the axial coordinates are matched.

  In addition, the stereoscopic image capturing apparatus of the present invention includes a first imaging unit that has a first variable magnification lens driven along the optical axis and acquires first image data, and the first variable magnification along the optical axis. A stereoscopic image capturing apparatus including a second imaging lens that has a second variable magnification lens driven in conjunction with the lens and acquires second image data, and detects a position of the first or second variable magnification lens Position detecting means, storage means for storing the optical axis coordinate difference and magnification difference of the first and second variable magnification lenses for each predetermined position, and coordinates of the second image data based on the optical axis coordinate difference. Coordinate changing means for changing, electronic scaling means for electronically scaling the second image data based on the magnification difference, magnification difference and optical axis coordinate difference corresponding to the position detected by the position detecting means Is read from the storage means, and the optical axis coordinate difference is read out from the coordinate changing means. To, and control means for setting the said magnification difference to the electronic zooming means, characterized in that to match the first and the axial coordinate and the shooting range of the second image data.

  It is preferable that the second variable magnification lens has a wider angle than the first variable magnification lens.

  According to the stereoscopic image capturing apparatus of the first aspect of the present invention, the magnification error due to the individual difference between the first and second variable power lenses is easily corrected, and an appropriate stereoscopic image can be obtained. Further, according to the stereoscopic image photographing apparatus according to claim 2 of the present invention, the optical axis shift due to the individual difference between the first and second variable power lenses is easily corrected, and an appropriate stereoscopic image can be obtained. Furthermore, according to the three-dimensional image photographing apparatus of the present invention, the magnification error and the optical axis shift due to the individual difference between the first and second variable power lenses can be easily corrected, and a more appropriate three-dimensional image can be obtained. It is done.

  1st Embodiment of this invention is described based on FIGS. In FIG. 1, a first lens barrel 4 a that holds the first imaging unit 3 a and a second lens barrel 4 b that holds the second imaging unit 3 b are incorporated in the front surface of the stereoscopic camera 2, and a strobe device 5 or the like. Is exposed. The first and second lens barrels 4a and 4b are arranged in parallel in the horizontal direction at a constant interval. In the photographing mode, the first and second lens barrels 4a and 4b are extended forward from the camera body as indicated by a solid line in the drawing, and are turned off or in an image reproduction mode. Sometimes it collapses into the camera body as shown by the dotted line in the figure. A shutter button 6 used for a shutter release operation is provided on the upper surface of the stereoscopic camera 2.

  In FIG. 2, an operation unit 10 including a zoom button 7, a menu button 8, a cursor button 9, and the like and an LCD (Liquid Crystal Display) 11 are provided on the rear surface of the stereoscopic camera 2. By appropriately operating the operation unit 10, the power is turned on / off, various modes (shooting mode, playback mode, etc.), zooming, and the like are performed. The LCD 11 is a parallax barrier type (or lenticular lens type) 3D monitor, and functions as an electronic viewfinder during image shooting and as an image playback monitor during image playback.

  FIG. 3 shows an electrical configuration of the stereoscopic camera 2. The first imaging unit 3a includes a first fixed lens 20, a first variable magnification lens 21, a first focus lens 22, and a first image sensor 23 arranged along the lens optical axis L1. The first fixed lens 20 is fixed in the first lens barrel 4a. The first variable magnification lens 21 is driven by a lens motor 24, and its position is detected by a first potentiometer 25. The first focus lens 22 is driven by a lens motor 26. The operation of the lens motors 24 and 26 is controlled by the CPU 40.

  The lens motor 24 moves the first variable magnification lens 21 to the tele side (feeding side) / wide side (retracting side) along the lens optical axis L1 in accordance with the operation of the zoom button 7 of the operation unit 10 to focus. Change the distance (shooting magnification). When the first variable magnification lens 21 is moved to the tele side, the focal length becomes long and the photographing range becomes narrow. When the first variable magnification lens 21 is moved to the wide side, the focal point becomes short and the photographing range becomes wide. The lens motor 26 moves the first focus lens 22 along the lens optical axis L1 to perform focus adjustment. The position of the first focus lens 22 is automatically adjusted with the movement of the first variable magnification lens 21 so as not to be out of focus.

  The first potentiometer 25 is a detector that detects the tele-wide position of the first variable magnification lens 21 and detects the position of the first variable magnification lens 21 as a voltage. The first potentiometer 25 has a voltage output characteristic that changes linearly with respect to a change in the position of the first variable magnification lens 21, and the detection voltage is input to the CPU 40.

  The first image sensor 23 receives subject light imaged by the first fixed lens 20, the first variable magnification lens 21, and the first focus lens 22, and accumulates photocharge corresponding to the amount of received light in the light receiving element. . The first image sensor 23 is controlled in its photocharge accumulation / transfer operation by a timing signal (clock pulse) input from a timing generator (not shown), and acquires an image signal for one screen at a predetermined period in the photographing mode. Then, the signals are sequentially input to the correlated double sampling circuit (CDS) 27. As the first image sensor 23, a CCD type or MOS type solid-state imaging device is used.

  A correlated double sampling circuit (CDS) 27 receives an image signal for one screen input from the first image sensor 23, and outputs R, G, B image data corresponding to the amount of accumulated charges of each light receiving element accurately. Input to the amplifier (AMP) 28. The AMP 28 amplifies the input image data and inputs it to the A / D converter 29. The A / D converter 29 converts the input image data from analog to digital. The imaging signal of the first image sensor 23 becomes first image data (right-eye image data) via the CDS 27, the AMP 28, and the A / D converter 29.

  The second imaging unit 3b has the same configuration as the first imaging unit 3a, and the first fixed lens 30, the second variable power lens 31 driven by the lens motor 34, and the second focus lens driven by the lens motor 36. 32 and a second image sensor 33 driven by a timing generator (not shown). The operation of the lens motors 34 and 36 is controlled by the CPU 40. The position of the second variable lens 31 is detected by a second potentiometer 35 having the same configuration as that of the first potentiometer 25, and the detection voltage is input to the CPU 40. In addition, the same thing as each member of the 1st imaging part 3a is used for each member of the 2nd imaging part 3b. The first imaging unit 3a and the second imaging unit 3b are synchronized and perform the same operation in conjunction with each other.

  The CDS 37, AMP 38, and A / D converter 39 have the same configuration as the CDS 27, AMP 28, and A / D converter 29 described above. The imaging signal of the second image sensor 33 becomes second image data (left-eye image data) via the CDS 37, the AMP 38, and the A / D converter 39.

  The first and second image data output from the A / D converters 29 and 39 are input to the image signal processing circuits 41 and 42, respectively. The image signal processing circuits 41 and 42 perform various image processing such as gradation conversion, white balance correction, and γ correction processing on each image data. The first image data output from the image signal processing circuit 41 is input to the frame memory 43. The second image data output from the image signal processing circuit 42 is input to the frame memory 43 via the electronic scaling circuit 44. The frame memory 43 is a working memory that temporarily stores the first and second image data.

  The electronic scaling circuit 44 performs a so-called electronic zoom process in which the second image data is electronically scaled (enlarged / reduced) in the horizontal and vertical directions with respect to the center (optical axis position) of the imaging range. . The scaling factor of the second image data by the electronic scaling circuit 44 is determined by the photographing range correction data stored in the correction data storage unit 52 of an EEPROM (Electrically Erasable Programmable Read Only Memory) 50 described later.

  The stereoscopic image processing circuit 45 combines the first and second image data stored in the frame memory 43 with stereoscopic image data for the LCD 11 to perform stereoscopic display. The LCD driver 56 causes the LCD 11 to display the stereoscopic image data synthesized by the stereoscopic image processing circuit 45 as a through image when the LCD 11 is used as an electronic viewfinder in the shooting mode.

  The compression / decompression processing circuit 47 performs compression processing on the first and second image data stored in the frame memory 43 using a compression format such as the JPEG method. The media controller 48 records each image data compressed by the compression / decompression processing circuit 47 on a recording medium 49 such as a memory card.

  When the first and second image data recorded on the recording medium 49 in this way are reproduced and displayed on the LCD 11, each image data recorded on the recording medium 49 is read by the media controller 48. Each image data subjected to the decompression processing by the compression / decompression processing circuit 47 is converted into stereoscopic image data by the stereoscopic image processing circuit 45, and then reproduced and displayed on the LCD 11 through the LCD driver 46.

  Although the detailed structure of the LCD 11 is not shown, the LCD 11 includes a parallax barrier display layer on the surface thereof. The LCD 11 generates a parallax barrier having a pattern in which light transmitting portions and light shielding portions are alternately arranged at a predetermined pitch on a parallax barrier display layer, and a strip showing left and right images on the lower image display surface. By displaying the image fragments alternately arranged, it is possible to make the viewer feel the stereoscopic effect of the image.

  The CPU 40 comprehensively controls the overall operation of the stereoscopic camera 2. In addition to the strobe device 5, shutter button 6, and operation unit 10 described above, an EEPROM 50 is connected to the CPU 40. The EEPROM 50 is a nonvolatile memory capable of electrically rewriting data, and includes a program storage unit 51 and a correction data storage unit 52.

  The program storage unit 51 stores a control program for the CPU 40 to execute various processes. The correction data storage unit 52 stores shooting range correction data for correcting a difference in shooting range due to individual differences between the first and second zoom lenses 21 and 31. The photographing range correction data is obtained by associating the stop positions of the first and second variable power lenses 21 and 31 with the magnification difference D1.

  FIG. 4 shows an example of shooting range correction data. The magnification difference D1 is determined based on individual differences between the first and second variable power lenses 21 and 31, and is determined for each of a plurality of stop positions Z1 to Z10. The magnification difference D1 shown in the figure is larger than 1 (D1> 1). This means that the second variable magnification lens 31 has a wider angle (short focus) than the first variable magnification lens 21.

As shown in FIG. 5, when the second image data is scaled (enlarged) by a predetermined magnification difference D1 obtained from the shooting range correction data in the vertical and horizontal directions with reference to the center C of the shooting range, the first and second The shooting ranges of the image data match (X ₁ = D 1 · X ₂ , Y ₁ = D 1 · Y ₂ ). A rectangular area α shown in the second image data corresponds to the shooting range of the first image data.

  The shutter button 6 has a two-stage push switch structure. When the shutter button 6 is lightly pressed (half-pressed) during the shooting mode, shooting preparation processing such as AF operation by an AF (automatic focusing) control circuit (not shown) is performed. In this state, when the shutter button 6 is further pressed (fully pressed), shooting processing is performed, and the first and second image data for one screen are transferred from the frame memory 43 to the recording medium 49.

  The operation of the first embodiment of the present invention will be described with reference to FIG. FIG. 6 shows processing at the time of zooming operation in the photographing mode. When the stereoscopic camera 2 is in the shooting mode, if the zooming operation is performed by the zoom button 7 (Yes in step S10), the first and second zooming lenses 21 and 31 are driven by the lens motors 24 and 34, respectively ( Step S11), and moves toward the stop position set by the scaling operation. The positions of the first and second zoom lenses 21 and 31 are detected one by one by the first and second potentiometers 25 and 35, respectively (step S12), and the CPU 40 is based on the detection voltages of the first and second potentiometers 25 and 35. Then, the positions of the first and second variable power lenses 21 and 31 are determined (step S13).

  When it is determined that the first and second zoom lenses 21 and 31 have reached the predetermined stop position (Yes in step S13), the CPU 40 captures the magnification difference D1 corresponding to the stop position in the correction data storage unit 52. Extracted from the range correction data (read out), the magnification difference D1 is set in the electronic magnification circuit 44 as the magnification of the second image data (step S14). For example, when the stop position is “Z8”, a magnification difference D1 of “1.08” is set in the electronic zoom circuit 44.

  Thereafter, when shooting is performed by operating the shutter button 6, the second image data is scaled (enlarged) based on the set magnification difference D1, and the shooting ranges of the first and second image data match. To do. Since the shooting ranges of the first and second image data stored in the frame memory 43 match in this way, appropriate stereoscopic image data can be obtained by the stereoscopic image processing circuit 45.

  In the first embodiment, the case where the second variable power lens 31 has a wider angle than the first variable power lens 21 is exemplified. However, the first variable power lens 21 has a wider angle than the second variable power lens 31. The present invention can also be applied. In this case, the magnification difference D1 is smaller than 1 (D1 <1), and the second image data is reduced by the electronic scaling circuit 44.

  In the first embodiment, the electronic zoom circuit 44 is provided after the image signal processing circuit 42 for outputting the second image data. Instead, the image signal for outputting the first image data is provided. Needless to say, an electronic zoom circuit 44 may be provided after the processing circuit 41.

  Next, a second embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 7, in the second embodiment, a coordinate changing circuit that changes the optical axis coordinates of the second image data by an optical axis coordinate difference D2, which will be described later, instead of the electronic zoom circuit 44 of the first embodiment. 53 is provided. The correction data storage unit 52 stores optical axis correction data for correcting the optical axis coordinates of the second image data, instead of the shooting range correction data of the first embodiment. Other configurations are the same as those in the first embodiment.

FIG. 8 shows an example of optical axis correction data. The optical axis coordinate difference D2 is determined based on individual differences between the first and second variable power lenses 21 and 31, and is determined for each of the plurality of stop positions Z1 to Z10. FIG. 9 shows an example of the first and second image data. The coordinates P1 (x ₁ , y ₁ ) and the coordinates P2 (x ₂ , y ₂ ) indicate the optical axis coordinates of each image data. The optical axis coordinate difference D2 of FIG. 8 corresponds to a coordinate difference (x ₂ −x ₁ , y ₂ −y ₁ ) obtained by subtracting the optical axis coordinate P1 of the first image data from the optical axis coordinate P2 of the second image data. .

  FIG. 10 shows processing at the time of zooming operation in the shooting mode. Steps S20 to S23 are the same as steps S10 to S13 in FIG. 6 of the first embodiment, and a description thereof will be omitted. After the zoom operation, if it is determined in step S23 that the first and second zoom lenses 21 and 31 have reached a predetermined stop position, the CPU 40 corrects the optical axis coordinate difference D2 corresponding to the stop position. Extracted from the optical axis correction data in the data storage unit 52, the optical axis coordinate difference D2 is set in the coordinate changing circuit 53 (step S24).

  Thereafter, when shooting is performed by operating the shutter button 6, a rectangular area β (see FIG. 9) centered on the optical axis coordinate P2 is cut out (selected) from the second image data, and the coordinates of the rectangular area β are selected. Is displaced by the optical axis coordinate difference D2. Thereby, the optical axis coordinates of the first and second image data match. Thus, since the optical axis coordinates of the first and second image data stored in the frame memory 43 coincide with each other, appropriate stereoscopic image data can be obtained by the stereoscopic image processing circuit 45.

  In the second embodiment, the coordinate changing circuit 53 is provided after the image signal processing circuit 42 for outputting the second image data. Instead, the image signal processing for outputting the first image data is performed. It goes without saying that the coordinate changing circuit 53 may be provided at the subsequent stage of the circuit 41.

  Next, a third embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 11, in the third embodiment, the electronic zoom circuit 44 of the first embodiment and the coordinate change circuit 53 of the second embodiment follow the image signal processing circuit 42 that outputs the second image data. Is provided. The correction data storage unit 52 stores the shooting range correction data of the first embodiment and the optical axis correction data of the second embodiment. Other configurations are the same as those in the first and second embodiments.

  FIG. 12 shows processing at the time of zooming operation in the shooting mode. Steps S30 to S33 are the same as steps S10 to S13 in FIG. 6 of the first embodiment, and a description thereof will be omitted. After the zooming operation, if it is determined in step S33 that the first and second zoom lenses 21 and 31 have reached a predetermined stop position, the CPU 40 determines the magnification difference D1 and the optical axis coordinates corresponding to the stop position. The difference D2 is extracted from the photographing range correction data and the optical axis correction data in the correction data storage unit 52, the magnification difference D1 is set in the electronic zoom circuit 44, and the optical axis coordinate difference D2 is set in the coordinate change circuit 53. Set (step S34).

  Thereafter, when shooting is performed by operating the shutter button 6, the electronic scaling circuit 44 scales the second image data with the magnification difference D1, and after the shooting ranges of the first and second image data match. In the coordinate change circuit 53, a rectangular area β (see FIG. 9) centered on the optical axis coordinate P2 is cut out (selected) from the second image data, and the coordinates of the rectangular area β are displaced by the optical axis coordinate difference D2. Is done. Thus, since the shooting ranges and optical axis coordinates of the first and second image data stored in the frame memory 43 coincide with each other, the stereoscopic image processing circuit 45 can obtain more appropriate stereoscopic image data.

  In the third embodiment, the coordinate change circuit 53 and the electronic scaling circuit 44 are provided after the image signal processing circuit 42 that outputs the second image data. Instead, the first image data is provided. Needless to say, the coordinate change circuit 53 and the electronic zoom circuit 44 may be provided in the subsequent stage of the image signal processing circuit 41 that outputs the signal.

  In the first to third embodiments, the electronic zoom circuit 44 and / or the coordinate change circuit 53 are provided at the subsequent stage of the image signal processing circuits 41 and 42. However, the present invention is not limited to this. The electronic zoom circuit 44 and / or the coordinate change circuit 53 may be provided at the subsequent stage of the A / D converters 29 and 39.

  In the first to third embodiments, the positions of both the first and second zoom lenses 21 and 31 are detected by the first and second potentiometers 25 and 35. Since the two variable magnification lenses 21 and 31 are driven in conjunction with each other, only one of the positions of the first and second variable magnification lenses 21 and 31 may be detected.

  In the first to third embodiments, the digital still camera that captures a still image is exemplified as the stereoscopic image capturing device of the present invention. However, the present invention is not limited to this, and the present invention is applicable to a digital video camera that captures a moving image. The present invention can also be applied.

It is an external view of the front side of a stereoscopic camera. It is an external view of the back side of a stereoscopic camera. It is a block diagram which shows the electrical structure of a stereo camera. It is a figure which shows an example of imaging | photography range correction data. It is a figure which shows an example of 1st and 2nd image data. It is a flowchart which shows the process at the time of zooming operation. It is a block diagram which shows the electric constitution of 2nd Embodiment of this invention. It is a figure which shows an example of the optical axis correction data of 2nd Embodiment of this invention. It is a figure which shows an example of the 1st and 2nd image data of 2nd Embodiment of this invention. It is a flowchart which shows the process at the time of scaling operation of 2nd Embodiment of this invention. It is a block diagram which shows the electric constitution of 3rd Embodiment of this invention. It is a flowchart which shows the process at the time of zooming operation of 3rd Embodiment of this invention.

Explanation of symbols

2 Stereo Camera 3a First Imaging Unit 3b Second Imaging Unit 7 Zoom Button 21 First Variable Lens 23 First Image Sensor 24, 26 Lens Motor 25 First Potentiometer (Position Detection Unit)
31 Second variable lens 33 Second image sensor 34, 36 Lens motor 35 Second potentiometer (position detecting means)
40 CPU (control means)
41, 42 Image signal processing circuit 44 Electronic scaling circuit (electronic scaling means)
45 stereoscopic image processing circuit 50 EEPROM (storage means)
51 Program storage unit 52 Correction data storage unit 53 Coordinate changing circuit (coordinate changing means)

Claims (4)

A first imaging unit having a first variable magnification lens driven along the optical axis and acquiring first image data, and a second variable driven in conjunction with the first variable magnification lens along the optical axis In a stereoscopic image capturing apparatus including a second imaging unit having a double lens and acquiring second image data,
Position detecting means for detecting the position of the first or second variable power lens;
Storage means for storing a magnification difference between the first and second variable power lenses for each predetermined position;
Electronic scaling means for electronically scaling the second image data based on the magnification difference;
Control means for reading a magnification difference corresponding to the position detected by the position detection means from the storage means and setting the difference in the electronic scaling means;
A stereoscopic image photographing apparatus, wherein the photographing ranges of the first and second image data are matched. A first imaging unit having a first variable magnification lens driven along the optical axis and acquiring first image data, and a second variable driven in conjunction with the first variable magnification lens along the optical axis In a stereoscopic image capturing apparatus including a second imaging unit having a double lens and acquiring second image data,
Position detecting means for detecting the position of the first or second variable power lens;
Storage means for storing optical axis coordinate differences of the first and second variable magnification lenses for each predetermined position;
Coordinate changing means for changing the coordinates of the second image data based on the optical axis coordinate difference;
Control means for reading an optical axis coordinate difference corresponding to the position detected by the position detection means from the storage means and setting the coordinate change means;
A three-dimensional image capturing apparatus, wherein optical axis coordinates of the first and second image data are made to coincide. A first imaging unit having a first variable magnification lens driven along the optical axis and acquiring first image data, and a second variable driven in conjunction with the first variable magnification lens along the optical axis In a stereoscopic image capturing apparatus including a second imaging unit having a double lens and acquiring second image data,
Position detecting means for detecting the position of the first or second variable power lens;
Storage means for storing optical axis coordinate differences and magnification differences of the first and second variable magnification lenses for each predetermined position;
Coordinate changing means for changing the coordinates of the second image data based on the optical axis coordinate difference;
Electronic scaling means for electronically scaling the second image data based on the magnification difference;
The magnification difference and the optical axis coordinate difference corresponding to the position detected by the position detecting unit are read from the storage unit, and the optical axis coordinate difference is set in the coordinate changing unit, and the magnification difference is set in the electronic scaling unit. Control means for
A stereoscopic image photographing apparatus, wherein the optical axis coordinates and photographing ranges of the first and second image data are matched. The stereoscopic image capturing apparatus according to claim 1, wherein the second variable magnification lens has a wider angle than the first variable magnification lens.

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