JPH08317424A - Stereoscopic photographing device - Google Patents

Abstract

PURPOSE: To provide a stereoscopic photographing device by which the deviation of the image of a photographing optical system generated in a zoom or AF operation due to working accuracy, etc., can be suppressed and there can be little sense of fatigue put on a photographer. CONSTITUTION: This device is the stereoscopic photographing device equipped with a first lens barrel 1R provided with a CCD 16R to obtain photographing information for a right eye, a second lens barrel 1L provided with a CCD 16L to obtain the photographing information for a left eye, a camera detection circuit 43 which detects the focal distance of those first and second lens barrels 1R, 1L, a ROM 47 consisting of an EEPROM, etc., in which the shift quantity of the optical axis centers of the first lens barrel 1R and the second lens barrel 1L at the focal distance, respectively, and a CPU 46 which controls an image segmenting area in at least either of the CCD 16R or the CCD 16L at the focal distance on the basis of the output of the ROM 47.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic photographing apparatus, and more particularly to a stereoscopic photographing apparatus for obtaining photographing information for the right eye and photographing information for the left eye by a pair of photographing optical systems.

[0002]

2. Description of the Related Art Conventionally, various stereoscopic image pickup apparatuses have been known which obtain a stereoscopic image by utilizing a parallax between a right eye and a left eye.

As a concrete example of such a stereoscopic photographing device, as shown in FIG. 21, there is a pair of photographing optical systems.
A first lens barrel 91R for capturing an image for the right eye and a second lens barrel 91L for capturing an image for the left eye are arranged on the mechanical chassis 93 at regular intervals.
It is widely known that the optical axes OR and OL of each optical system are directed to the subject 92 side to obtain image information for the right eye and image information for the left eye.

Further, Japanese Patent Application Laid-Open No. 7-15749 discloses a first video camera section and a second video camera section, and a diaphragm for a lens group provided in each of the first and second video camera sections. , At least one control means for controlling a mechanism for setting each imaging condition such as focus and zoom, and a focus calculation circuit for detecting a focus state of at least one of the first and second video camera sections, In the compound-eye image pickup apparatus including: the control means outputs the first output from one output of the focus calculation circuit.
, A compound-eye imaging device that drives the focus mechanism of the video camera unit and the second video camera unit.

Thus, the left and right lens mirrors are simultaneously driven by the same amount based on the information obtained from one of the left and right lens barrels. The deviation of the focus and the deviation of the focal length of the cylinder are suppressed.

[0006]

However, in the above-described conventional stereoscopic photographing apparatus, the optical axis centers of the left and right lens barrels may be deviated from each other depending on the working precision and the like. Especially for a lens barrel equipped with a zoom lens, the center of the optical axis may shift at each focal length during zooming. It is very difficult to deal with.

Further, in the above-mentioned Japanese Patent Laid-Open No. 7-15749, it is possible to synchronize the focal length adjustment by the zoom and the focus adjustment by the AF for the left and right lens barrels, but this occurs at the time of assembly. Deviation,
The screens of the left and right lens barrels cannot be corrected vertically or horizontally. Further, depending on the working accuracy of the lens barrel, image shaking may occur when the driving of zoom or AF is started, during driving, or when the driving direction is reversed.

As described above, observing the left and right images that move in a displaced manner causes a great feeling of fatigue for the observer, and further, when the image is displaced vertically or outwardly. In many cases, the fusion will not occur.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a stereoscopic photographing apparatus capable of suppressing a shift of an image generated in a photographing optical system and giving a photographer less feeling of fatigue. I am trying.

[0010]

In order to achieve the above object, the stereoscopic photographing apparatus according to the first invention is a first photographing optical system having a first image pickup device for obtaining photographing information for the right eye. System, a second photographing optical system having a second image sensor for obtaining photographing information for the left eye, and a focal length for detecting focal lengths of the first photographing optical system and the second photographing optical system. Detection means, the first photographing optical system and the second photographing optical system at each focal length
Of the optical axis center of each of the photographing optical systems, and at least one of the first image pickup device and the second image pickup device at each focal length based on the output from the storage device. And a control means for controlling the image cutout area.

The stereoscopic photographing apparatus according to the second invention is
A first photographing optical system having a first image pickup element for obtaining photographing information for the right eye, and a second photographing optical system having a second image pickup element for obtaining photographing information for the left eye, Storage means for storing in advance the shaking amounts of the optical member supporting means of the first and second photographing optical systems during driving, and the first means at each focal length based on the output from the storage means.
The image pickup device and the control unit for controlling the image cutout area in at least one of the second image pickup device.

Further, according to the third aspect of the invention, the stereoscopic image pickup apparatus has a first image pickup optical system having a first image pickup element for obtaining image pickup information for the right eye, and image pickup information for the left eye. A second image pickup optical system having a second image pickup element; and a detection unit that detects image shake based on image pickup information obtained from a predetermined one of the first image pickup element and the second image pickup element. , When this detecting means detects the shake of the image, the amount of canceling the detected shake amount in one of the predetermined photographing optical systems is the amount of canceling the shake amount in the other photographing optical system multiplied by a predetermined coefficient. Only the first image sensor and the second
And a control unit for controlling the image cutout area of the image pickup device.

A stereoscopic photographing apparatus according to a fourth aspect of the present invention comprises a first photographing optical system having a first image pickup device for obtaining photographing information for the right eye and a photographing image for the left eye. A second photographing optical system having a second image pickup device, a subject recognizing unit that substantially recognizes a main subject in the first photographing optical system and the second photographing optical system, and a subject recognizing unit that substantially recognizes the main subject. The image cutout area of at least one of the first image pickup device and the second image pickup device is controlled so that the positions of the main subject in the image cutout area of the first image pickup device and the second image pickup device match. And a control means for controlling the operation.

In addition, the stereoscopic photographing apparatus according to the fifth aspect of the invention has a first photographing optical system having a first image pickup element for obtaining photographing information for the right eye and a photographing information for the left eye. Second image pickup optical system having a second image pickup element, a focal length detecting means for detecting focal lengths of the first image pickup optical system and the second image pickup optical system, and the first image pickup optical system at each focal length. A storage unit that stores in advance the deviation amounts of the respective angles of view of the photographing optical system and the second photographing optical system, and the first image pickup device and the second image pickup device at each focal length based on the output from the storage unit. And a control means for controlling the image cutout area in at least one of the above.

[0015]

In the stereoscopic photographing apparatus according to the first aspect of the present invention, the first photographing optical system obtains photographing information for the right eye by the first image pickup device and the second photographing optical system makes the left by the second image pickup device. After obtaining the photographing information for the eye, the focal length detecting means detects the focal lengths of the first photographing optical system and the second photographing optical system, and the first photographing optical system and the second photographing optical system at each focal length. Based on the output from the storage unit that stores in advance the displacement amount of each optical axis center of the photographing optical system, the control unit causes the image in at least one of the first image sensor and the second image sensor at each focal length. Control the cutting area.

The stereoscopic photographing apparatus according to the second invention is
The first photographing optical system obtains the photographing information for the right eye from the first image pickup element, the second photographing optical system obtains the photographing information for the left eye from the second image pickup element, and the above when driving The control means controls the first image pickup device and the second image pickup element at each focal length on the basis of the output from the storage means in which the shake amounts of the optical member supporting means of the first and second photographing optical systems are stored in advance.
The image cutout area in at least one of the image pickup devices is controlled.

Further, in the stereoscopic photographing apparatus according to the third invention, the first photographing optical system obtains photographing information for the right eye from the first image pickup element, and the second photographing optical system sets the second image pickup element. The image pickup information for the left eye is obtained by the detecting means, the detecting means detects the shake of the image based on the image pickup information obtained from a predetermined one of the first image pickup element or the second image pickup element, and the control means When one of the predetermined photographing optical systems detects the shake of the image by the detecting means, it cancels the detected shake amount in the other photographing optical system, and in the other photographing optical system, it cancels the shake amount by a predetermined coefficient. The image cutout areas of the first image sensor and the second image sensor are controlled.

In the stereoscopic photographing apparatus according to the fourth aspect of the invention, the first photographing optical system obtains the photographing information for the right eye from the first image pickup element and the second photographing optical system sets the second image pickup element. The photographing information for the left eye is obtained by the subject recognition means, the subject recognition means substantially recognizes the main subject in the first photographing optical system and the second photographing optical system, and the control means substantially recognizes the main subject by the subject recognition means. The image cutout area of at least one of the first image pickup device and the second image pickup device is controlled so that the positions of the subject in the image cutout area of the first image pickup device and the second image pickup device match. .

In addition, in the stereoscopic photographing apparatus according to the fifth invention, the first photographing optical system obtains photographing information for the right eye by the first image pickup device, and the second photographing optical system takes the second photographing image. The element obtains the photographing information for the left eye, the focal length detecting means detects the focal lengths of the first photographing optical system and the second photographing optical system, and the focal length detecting means detects the focal lengths of the first photographing optical system and the first photographing optical system at each focal length. Based on the output from the storage unit that stores in advance the shift amount of each angle of view of the second image-capturing optical system, the control unit controls at least one of the first image sensor and the second image sensor at each focal length. Control the image cutout area in.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 9 show a first embodiment of the present invention, and FIG. 1 is a plan sectional view showing an optical system of a stereoscopic photographing apparatus according to the first embodiment.

This optical system includes a first lens barrel 1R, which is a first photographing optical system for capturing a right-eye image, and a second photographing optical system, which is a second photographing optical system for capturing a left-eye image. And a lens barrel 1L.

The first lens barrel 1R is formed by connecting a first lens frame 18R and a second lens frame 19R in series from the front side along the optical axis OR, and on the rear side of the second lens frame 19R. A CCD 16R, which is an image pickup element, is arranged via the optical filter 15R.

The first lens frame 18R fixes and holds the first lens group 11R on the front side, the diaphragm 17R and the third lens group 13R on the rear side, and the second lens group which is a zoom lens inside. It has 12R.

The second group lens 12R is held by a second group lens holding frame 21R which is an optical member supporting means, and a plurality of guide shafts 23 supported by the first lens frame 18R.
It is held by R so that it can move back and forth in the optical axis direction.

The second lens frame 19R has a fourth group lens 14R, which is a focus lens, inside, and the fourth group lens 14R is held by a fourth group lens holding frame 22R which is an optical member supporting means. Then, the plurality of guide shafts 24R supported by the second lens frame 19R are held so as to be movable back and forth in the optical axis direction.

One end side of a nut member 25R is inserted through one of the guide shafts 24R, and is pressed in the optical axis direction by a leaf spring or the like, whereby the fourth group lens holding frame 22R is pressed.
It is designed to move integrally with the optical axis.

The nut member 25R is screwed to the feed screw 26R on the other end side, and the feed screw 26R is connected to the motor shaft of the focus motor 27R so as to rotate integrally.

Thus, during focusing operation or zooming focus correction, the feed screw 26R is rotationally driven by the focus motor 27R to move the nut member 25R forward and backward, thereby moving the fourth lens group holding frame 22R in the optical axis direction. It is designed to be positioned.

The second group lens holding frame 21R is
As shown in FIG. 2, a nut member 28R is screwed onto the feed screw 29R, and positioning is performed in the optical axis direction via the nut member 28R.

The nut member 28R has an extending portion extending in the outer diameter direction, and the position of the extending portion is detected by the zoom encoder 33 to hold the second lens group 12R which is a zoom lens. The position of the second group lens holding frame 21R is detected.

The feed screw 29R meshes with a zoom motor 31R via a gear train 30R.

Thus, during the zooming operation, the zoom motor 31R rotationally drives the feed screw 29R through the gear train 30R to move the second lens holding frame 21R forward and backward in the optical axis direction.

Returning to FIG. 1, the left second lens barrel 1L.
Is also configured in substantially the same manner as the first lens barrel 1R on the right side, and includes a first lens frame 18L and a second lens frame 19L that are connected from the front side along the optical axis OL. Mirror frame 19L
C which is an image sensor on the rear side of
CD16L is provided.

The first lens frame 18L fixes and holds the first lens group 11L on the front side, the diaphragm 17L and the third lens group 13L on the rear side, and the second lens group which is a zoom lens inside. It has 12L.

The second lens group 12L is held by a second lens group holding frame 21L, which is an optical member supporting means, and a plurality of guide shafts 23 supported by the first lens frame 18L.
It is held by L so that it can move back and forth in the optical axis direction.

The second lens frame 19L has a fourth group lens 14L which is a focus lens therein, and the fourth group lens 14L is held by a fourth group lens holding frame 22L which is an optical member supporting means. Then, the plurality of guide shafts 24L supported by the second lens frame 19L are held so as to be movable back and forth in the optical axis direction.

One end side of the nut member 25L is inserted through one of the guide shafts 24L, and the fourth group lens holding frame 22L is pressed by pressing the nut member 25L in the optical axis direction by a leaf spring or the like.
It is designed to move integrally with the optical axis.

The nut member 25L is screwed into the feed screw 26L on the other end side, and the feed screw 26L is connected to the motor shaft of the focus motor 27L so as to rotate integrally.

Thus, during focusing operation or during zooming focus correction, the feed screw 26L is rotationally driven by the focus motor 27L to move the nut member 25L forward and backward, thereby holding the fourth lens group 14L. The holding frame 22L is positioned in the optical axis direction.

The second group lens holding frame 21L is also
Although not shown, the mechanism similar to that shown in FIG. 2 is used to advance and retract in the optical axis direction. And by providing the same zoom encoder 33,
Second lens holding second lens group 12L, which is a zoom lens
The position of the group lens holding frame 21L is detected.

As shown in FIG. 3, a pair of optical systems composed of the first lens barrel 1R on the right side and the second lens barrel 1L on the left side as described above are rotatable about points 2R and 2L, respectively. The mechanical chassis 3 is assembled so that

At this time, the first lens barrel 1R uses the motor 4 as a driving source through the gear 6 and the gear unit 5R, and the second lens barrel 1L uses the motor 4 as a driving source in the gear unit 5L. Through point 2 above
The directions of the respective optical axes OR and OL can be changed by rotating them around R and 2L.

FIG. 4 is a block diagram showing the structure of the stereoscopic photographing apparatus.

This stereoscopic photographing device is configured as described above, and uses the camera block 4 for photographing a right-eye image and a left-eye image for obtaining a stereoscopic image by utilizing binocular parallax.
1 and the right eye and left eye image information captured by the camera block 41 is used to reproduce a stereoscopic image using binocular parallax, and can also be used as a finder at the time of capturing. And a reproduction block 51.

The camera block 41 takes in the image pickup output signals of the CCDs 16R and 16L of the first and second lens barrels 1R and 1L, and the left and right image information is processed by a CPU which will be described later.
The image pickup circuit 44 for the left and right lenses, which is output to the image pickup circuit 46, and the image pattern recognition circuit 45, which is a subject recognition means for recognizing the pattern of the subject image based on the image information of the image pickup circuit 44 for the left and right lenses and outputting the output to the CPU 46 And the CPU 46, which is a control unit that controls the entire stereoscopic photographing apparatus and also controls video processing, and the first and second CPUs.
A camera drive circuit 42 for driving and controlling the focus, zoom, diaphragm, lens convergence angle, etc. of the lens barrels 1R, 1L, and the first and second drive circuits driven by the camera drive circuit 42.
A camera detection circuit 43, which is a focal length detection means for detecting the focus state, focal length, aperture opening diameter, vergence angle, baseline length, etc. of the lens barrels 1R and 1L, and the photographed image information processed through the CPU 46, for example, An image recording circuit 49 for recording on a recording medium such as a magnetic tape 50, and an instruction for setting photographing conditions and for starting and stopping photographing, reproduction, etc.
An external input detection circuit 48 to be supplied to U46, and a ROM 47 which is a storage means such as an EEPROM in which variation data of the first lens barrel 1R and the second lens barrel 1L regarding focusing are stored. ing.

Further, the reproduction block 51 is the CP
An image processing circuit 52 which is controlled by U46 and takes in the output of the image pickup circuit 44 of the left and right lenses and processes the output, and an image reproducing circuit which takes in the output of the image processing circuit 52 and outputs it as a video reproduction signal. 53 and a stereoscopic image monitor 55 of a lenticular lens type or a polarization type, which inputs a video image reproduction signal of the image reproduction circuit 53 to display a stereoscopic image by utilizing the parallax of the left and right eyes, or for left and right images. Head-mounted display (hereinafter, abbreviated as HMD) consisting of two sets of liquid crystal displays and a reproduction optical system for observing this display image as a virtual image.
56 and a line-of-sight detection circuit 54 that detects the line-of-sight direction of the operator in the stereoscopic monitor 55 or the HMD 56.

Next, as a general photographing condition, consider a case where a stereoscopic image is photographed in the condition as shown in FIG. 3, for example.

Here, when the first lens barrel 1R and the second lens barrel 1L are set to the wide side, the images 61R and 61L on the CCDs 16R and 17L at this time are as follows:
For example, as shown in FIG.

That is, it is assumed that the foreheads of the subject images 8R and 8L, for example, coincide with the central positions 62R and 62L on the images 61R and 61L, respectively.

When zooming in the tele direction from this state, ideally the image should be as shown in FIG. 6, but in reality, due to the working precision of the photographic optical system, etc.
The optical axis centers of the first lens barrel 1R and the second lens barrel 1L often deviate according to the focal length during zooming.

An example of such a shifted image is shown in FIG.

That is, on the image 61R, the position of the forehead of the subject image 8R with respect to the center position 62R is displaced by ΔdHR in the horizontal direction and ΔdVR in the vertical direction,
On the image 61L, the forehead position of the subject image 8L with respect to its center position 62L is ΔdHL in the horizontal direction and ΔDHL in the vertical direction.
It is assumed that it is offset by dVL.

In such a case, for example, the above FMD56
The line of sight 63R of the right eye and the line of sight 63L of the left eye for observing the image of the subject 8 in the upper images 56R and 56L are deviated as illustrated.

That is, the line of sight 63R of the right eye and the line of sight 6 of the left eye
3L shifts in the vertical direction and spreads further outward in the left-right direction than when looking at infinity, and the photographer is very tired to observe. further,
If the image shift is more significant, the fusion may not occur.

Therefore, with the first lens barrel 1R and the second lens barrel 1L assembled and attached to the mechanical chassis 3, the central positions 62 of the CCDs 16R and 16L at the wide end are set.
Based on R and 62L, this center position 62 at the wide end
How much the object images 8R and 8L that were in R and 62L deviate at each focal length when zooming is performed, that is, the deviation amounts ΔdHR, ΔdVR, ΔdHL, and Δ, for example.
dVL is measured in advance. Then, the deviation amount is recorded in the ROM 47 as a memory unit.

The correction information written in the ROM 47 may be information for correcting the first lens barrel 1R and the second lens barrel 2R independently, or the first lens barrel 1R and the second lens barrel. It may be information that corrects so as to match the shift of the other lens barrel with one of the barrels 2R as a reference. This is because the deviation of the normal optical axis center is not so noticeable in general use, and even if the deviation is overall, it is sufficient that the left and right sides are aligned.

Next, the operation of this embodiment will be described with reference to FIG. During zoom driving, the zoom motor 31
The camera detection circuit 43 detects the focal length based on the output of the zoom encoder 33 that operates in conjunction with R and the like (step S
1) Then, the CPU 46, which has obtained the detection result, retrieves the image shift amount at the focal length from the ROM 47 (step S2).

Then, the CPU 46 calculates the change amount of the image cutout area by the amount corresponding to the shift amount (step S3), and based on the calculated change amount, the CCD
The image cutout areas of 16R and 16L are changed (step S4).

That is, in the case of the displacement as shown in FIG. 7, the image circle 64 of each of the first lens barrel 1R and the second lens barrel 2R is shown in FIG.
In the images 61R and 61L on the CCDs 16R and 16L contained in the R and 64L, based on the deviation amounts ΔdHR, ΔdVR, ΔdHL and ΔdVL called from the ROM 47, the cutout areas 66R and 66L can be corrected.
Is determined as shown in the drawing and cutting is performed.

At this time, on the wide side as shown in FIG. 5, since the deviation is small, the cutout areas 65R, 65L are cut out on the tele side cutout areas 66R, 6R.
While having the same area as 6L, it is located in the substantially central portion on the images 61R and 61L.

In the above description, the shift when zooming is performed is corrected, but for example, the fourth group lens holding frame 22R, which holds the fourth group lenses 14R and 14L, which are the focus lenses when performing AF, is used. It is also possible to eliminate the deviation of the image during AF driving by recording the deviation amount of the optical axis for each position of 22L in advance in the ROM 47.

According to the first embodiment as described above, the image shift caused by the shift of the optical axis due to the zoom or AF operation can be corrected, so that the photographer can observe a stable and good image. You can do it, and you will feel less tired.

10 and 11 show the second embodiment of the present invention. FIG. 10 is a diagram showing the relationship between the amount of image shake and time, and FIG. 11 is the stereoscopic photographing apparatus of the second embodiment. It is a flow chart which shows an operation of. In this second embodiment,
The description of the same parts as those in the above-described first embodiment will be omitted, and only different points will be mainly described.

At the time of starting driving or reversing the zoom, there is looseness between the sleeve portions of the second group lens holding frames 21R and 21L holding the second group lenses 12R and 12L, which are zoom lenses, and the guide shafts 23R and 23L, and zooming. Depending on the layout of the mechanism that drives the second group lens holding frame 21R and the like from the motor 31R via the gear train 30R and the feed screw 29R, instantaneous decentering of the second group lenses 12R and 12L may occur. Due to this eccentricity, the CCD 16R, 16
Image shake will occur on L.

Similarly, when the AF drive is started or reversed,
The play between the sleeve portions of the fourth group lens holding frames 22R and 22L that holds the fourth group lenses 14R and 14L, which are focus lenses, and the guide shafts 24R and 24L, and the feed screws 26R and 26L and the nuts from the focus motors 27R and 27L. Due to the layout of the mechanism that drives the fourth group lens holding frames 22R and 22L via the members 25R and 25L, a sudden eccentricity is generated in the fourth group lenses 14R and 14L, and image fluctuations occur on the CCDs 16R and 16L. May occur.

The amount and direction of the eccentricity of the photographing optical system can be theoretically estimated from the layout and the amount of backlash, or can be confirmed by actual measurement at the time of assembly.

Therefore, in what kind of state, in what direction and in what direction the eccentricity occurs, as time-series data, that is, as shown in FIG. 10, for example, as shown in FIG. From the above, how the image shake occurs is stored in advance in the ROM 47 as data along with time.

Next, the operation of this embodiment will be described with reference to FIG. When the operation is started and a zoom switch (not shown) is turned on (step S11), the CPU
The driving direction at the time of previous zooming is called from the storage means in 46 (step S12).

Then, the direction of the current zoom is detected from the output of the zoom switch, and it is determined whether the direction of the previous zoom is the forward direction or the reverse direction (step S13).

Next, from the ROM 47, the above step S
The time-series data of the direction and amount of the image shake corresponding to the forward direction or the reverse direction detected in 13 is called (step S14), and the CCDs 16R and 16L are based on the data.
Then, the change amount of the image area to be cut out at each time is calculated (step S15).

Based on this calculation result, at each time, C
The image cutout areas of the CDs 16R and 16L are changed (step S16).

Further, when performing the AF operation,
The image cutout areas of the CCDs 16R and 16L are changed at each time in the direction of canceling the eccentricity according to each situation.

In the above description, it is determined whether the current zoom direction is the forward feed direction or the reverse direction with respect to the previous zoom direction, and the amount of image shake corresponding to that is read from the ROM 47. Although it was driven, the direction and amount of shaking may also change depending on whether it is going from the tele side to the wide side or from the wide side to the tele side, so judge these and based on the judgment result. Alternatively, the image cutout area may be changed.

In addition, depending on the layout of the first and second lens barrels 1R and 1L, there are cases in which the respective swings differ, and in such a case, the first and second lens barrels 1R and 1L. ROM47 data for each of
Write in.

According to the second embodiment as described above, since it is possible to correct the time-series image shift caused by the eccentricity caused by the zoom operation or the AF operation, the photographer can obtain a stable and good image. Can be observed and the feeling of fatigue is reduced.

12 to 14 show a third embodiment of the present invention. In this third embodiment, the description of the same parts as those in the above-mentioned first and second embodiments will be omitted. Mainly, only different points will be described.

In this embodiment, a camera-shake detecting circuit is incorporated in the image pickup circuit 44 of the left and right lenses as a detecting means, and image pickup data from only one of the first and second lens barrels 1R and 1L, for example, the right side. General camera shake is detected based on the imaging data from the first lens barrel 1R, and image shake due to eccentricity of the second lens group holding frame 21R and the fourth lens group holding frame 22R of the first lens barrel 1R is also detected. Detect at the same time.

The shaking of the image due to the camera shake and the shaking of the image due to the eccentricity of the frame are distinguished by the direction, amplitude, frequency, etc. of the shaking.

In order to correct the shake detected by the image pickup circuit 44 of the left and right lenses on the basis of the image pickup data from the first lens barrel 1R, the CPU 46 as the control means is the CCD.
The image cutout areas of both 16R and CCD 16L are changed.

At this time, image shake caused by camera shake is
Since it is considered that they appear almost equally in the first and second lens barrels 1R and 1L, the shake amount detected based on the imaging data from the first lens barrel 1R is directly used as the image cutout of the second lens barrel 1L. It also applies to changing the area.

On the other hand, the shake due to the eccentricity of the frame may be obtained by using the detected amount as it is as the correction amount for the first lens barrel 1R, but it depends on the layout of the frame for the second lens barrel 1L.

That is, when the layout of the second lens barrel 1L is the same as that of the first lens barrel 1R, the shake amount detected based on the image data from the first lens barrel 1R is used as it is as the correction amount. However, for example, FIG. 12 and FIG.
As shown in FIG. 3, when the left and right zoom lens holding frames or the focus lens holding frames are integrally formed, it is necessary to change the correction amount of the frame shake due to eccentricity depending on the layout.

Such an example will be described with reference to FIGS. FIG. 12 is a perspective view showing the drive mechanism of the second group lens which is a zoom lens, and FIG. 13 is a front view showing the drive mechanism of the second group lens.

The second lens group 12R, which is a zoom lens,
12L are held by the same second group lens holding frame 21, and the optical axes OR of these second group lenses 12R and 12L are
CCDs 16R and 16L are provided behind the OL.

U is attached to one end of the second lens group holding frame 21.
A notch 21a having a character shape is provided to engage with the guide shaft 23L, and a hole 21b is provided at the other end to engage with the guide shaft 23R. Thus, the second group lens holding frame 2
1 is held by two guide shafts 23R and 23L so as to be slidable in the optical axis direction.

A female screw hole 21c is threaded at a further end portion of the second group lens holding frame 21 on the hole 21b side, and is screwed into a feed screw 29 rotatably held at both ends of the frame member 32. I am fit.

The feed screw 29 is attached to the motor shaft of the zoom motor 31 so as to rotate integrally.

As described above, since the second group lens holding frame 21 is driven on one side in the optical axis direction,
Its shape is also asymmetrical to the left and right.

In the layouts shown in FIGS. 12 and 13, the second group lens holding frame 21 and the guide shaft 23R,
When there is play in 23L, when the force by the feed screw 29 is applied, the left and right second lens groups 12R and 12L are displaced differently in size.

That is, when a force in the optical axis direction is applied by the feed screw 29, as shown in FIG. 13 (A), the second group lens 12L is compared with the displacement in the optical axis direction that occurs on the second group lens 12R side. The displacement in the optical axis direction generated on the side becomes large.

When a force in the rotation direction is applied by the feed screw 29, a force in the rotation direction ω is generated as shown in FIG. 13 (B).
As a result of the addition of .DELTA.

These deviations δR and δL are determined by the distance G between the feed screw 29 and the guide shaft 23R and the two guide shafts 23.
It depends on the distance F between the R and 23L, etc., and also on the size δ of the play generated in the guide shaft 23L and the U-shaped notch 21a, etc., and theoretically based on these amounts. It is possible to guess.

Then, in the layout of the optical system as shown in FIGS. 12 and 13, for example, δL> δR, δ≈δ
The relationship is L, δR <δ / 2, and so on.

In the above layout, when the decentering amount δR of the second group lens 12R is x, the decentering amount δL of the second group lens 12L with respect to this is theoretically a value obtained by multiplying a predetermined constant k. It becomes a certain kx. Therefore, the correction amount of the frame shake due to the eccentricity needs to be k times the second lens barrel 1L side with respect to the first lens barrel 1R.

Next, the operation of this embodiment will be described with reference to FIG. When the operation is started, the image shake detection circuit provided in the image pickup circuit 44 of the left and right lenses detects the image shake based on the image pickup data of only one of the first and second lens barrels 1R and 1L ( Step S21).

Then, by analyzing the shake direction, amplitude, frequency, etc. (step S22), it is determined whether the image shake is due to camera shake, or the first and second lens barrels 1R, 1
The second lens group holding frame 21R, 21L or the second lens group in L
Group lens holding frame 21 or fourth group lens holding frame 22
Is it caused by the eccentricity of R and 22L?
Alternatively, it is detected whether or not the camera shake and the eccentricity are superposed (step S23).

Then, based on the detection result, the CCD 1
The amount of changing the image cutout areas of 6R and 16L is calculated (step S24). At this time, for example, in FIG.
If the layout is as shown in FIG. 13, CC
The change amount of the image cutout area of D16L is CCD16R
The calculation is performed by multiplying the change amount of the image cutout area of k times.

From the calculation result thus obtained, the CCD
The image cutout areas of 16R and 16L are changed (step S25).

As described above, in the stereoscopic photographing apparatus according to the present embodiment, the camera shake detection circuit detects the image based on only the photographing information obtained from the one lens barrel, so that the camera shake can be removed and the eccentricity is generated. The frame shaking can be removed simultaneously on the left and right.

According to the third embodiment as described above, by skillfully utilizing the camera shake correction function which is an essential function in recent video movies, and which is also the same in stereoscopic images, both the left and right sides can be formed with an inexpensive structure. Since the camera shake and the frame shake of the lens barrel can be removed at the same time, the photographer can observe a stable and good image and feel less tired.

Next, a modification of the third embodiment will be described.

In this modification, an angular velocity sensor is provided on at least one of the first lens barrel 1R and the second lens barrel 1L to detect camera shake. This angular velocity sensor
Only the shaking caused by touch is detected, and the image shaking caused by frame shaking is not detected.

Thus, by subtracting the shake component detected by the angular velocity sensor from the image shake detected by the image sensor, only the image shake component due to the frame shake can be reliably extracted.

According to such a modification of the third embodiment,
In addition to the effect similar to that of the third embodiment,
Even if camera shake near the frequency of frame shake occurs, correction can be performed more accurately.

15 to 17 show the fourth embodiment of the present invention. In the fourth embodiment, description of the same parts as those of the first to third embodiments will be omitted, and only different points will be mainly described.

Also in this embodiment, a camera shake detection circuit is incorporated in the image pickup circuit 44 of the left and right lenses as a detection means, and for example, a general camera shake is made based on the image pickup data from only the right first lens barrel 1R. To detect. This is because it is considered that image shake due to camera shake appears in the left and right lenses almost equally.

In this way, the shake detected based on the image pickup data of the first lens barrel 1R is directly used for the second lens barrel 1
Also applied to L, the camera shake of the first and second lens barrels 1R and 1L is corrected at the same time.

Even after such correction of camera shake,
When the focal length is changed by zooming, as described above,
Image shake may still occur due to the deviation of the center of the optical axis depending on each focal length or the eccentricity of the lens barrel, especially the left and right eccentricities.

In order to deal with such a case,
An image pattern recognition circuit 45 (see FIG. 4) is provided as a subject recognition unit that recognizes each main subject based on the imaged data from both the second lens barrels 1R and 1L.

The image pattern recognition circuit 45 recognizes the main subject common to the first and second lens barrels 1R and 1L, and the recognized main subject is the left and right images 61R and 61R.
The positions in the 61L are respectively detected and compared, and the image cutout areas of the CCDs 16R and 16L are changed so that the vertical displacement of these main subjects is always zero.

FIG. 1 shows how to change this cutout area.
5, it will be specifically described with reference to FIG.

For example, as shown in FIG. 15, CCD16R
On the image 61R by the
If the subject image 8L is at the position SL from the bottom on the image 61L by the CCD 16L, the deviation ΔS of these vertical positions is SL-SR.

At this time, as shown in FIG. 16, the normal cutout areas 71R and 71L are changed so that the main subjects approach each other by ΔS / 2. That is,
The cutout area 71R of the CCD 16R is changed downward by ΔS / 2 to be a cutout area 72R, and the cutout area 71L of the CCD 16L is changed upward by ΔS / 2 to be a cutout area 72L.

In the above description, the left and right cutout areas are ΔS /
Although it is changed by two, it is possible to correct the other by ΔS with reference to either one.

Next, the operation of this embodiment will be described with reference to FIG. When the operation is started, the image pattern recognition circuit 45, which is a subject recognition means, recognizes the common main subject in the first and second lens barrels 1R and 1L (step S31), and determines the reference position of the main subject. It is determined (step S32).

Then, by comparing the reference positions, the displacements of the CCDs 16R and 16L are compared to calculate the difference (step S33), and the respective CCDs 16R and 1L are calculated.
By changing the cutout area by half of the difference in 6L, the reference positions of the left and right main subjects are matched (step S34).

From the viewpoint that the image may not be fused if it shifts in the vertical direction, the shift in the same direction is corrected by emphasizing the shift in the vertical direction in the above description. It is needless to say that the deviation may be corrected.

According to the fourth embodiment as described above, by providing the camera shake detection circuit for one of the lens barrels, the camera shake of both lens barrels can be corrected, and even after the camera shake correction is performed. Since the shake of the optical system and the optical axis shift at the time of the remaining zoom or AF can be corrected well, the photographer can observe a stable and good image and feel less tired. .

Further, since the cutout area is changed by ½ of the shift amount of the reference positions of the left and right main subjects, the correction is performed as compared with the case where only the other is changed based on one. The allowable range is doubled.

Next, a modified example of the fourth embodiment will be described.

In the fourth embodiment, the camera shake is detected by CC.
Although this is performed using D16R and 16L, in this modification, an angular velocity sensor is provided at an intermediate position between the first lens barrel 1R and the second lens barrel 1L to detect camera shake. Thereby, the camera shake of the first lens barrel 1R and the second lens barrel 1L can be detected on average.

Further, since an intermediate position between the first lens barrel 1R and the second lens barrel 1L is a region where members and the like are not often arranged, the dead space is effectively used for the arrangement. As a result, the stereoscopic imaging device does not become large.

It should be noted that the camera shake correction is first performed on one lens barrel, and the image obtained from the corrected lens barrel is compared with the image on the other lens barrel to correct these differences. It may be done.

According to such a modification of the fourth embodiment,
In addition to the effect similar to that of the above-mentioned fourth embodiment,
It is possible to correct camera shake of the lens barrel without increasing the size of the stereoscopic imaging device.

Next, a fifth embodiment of the present invention will be described. In the fifth embodiment, description of the same parts as those of the first to fourth embodiments will be omitted, and only different points will be mainly described.

In the fifth embodiment, a camera shake detecting circuit is incorporated in the image pickup circuit 44 of the left and right lenses as a detecting means, and based on the image pickup data obtained from both the first lens barrel 1R and the second lens barrel 1L. Then, the image shake due to the hand shake and the frame shake is detected on each of the left and right sides, and the necessary correction is performed by calculating and changing the image cutout areas of the CCDs 16R and 16L based on the detection results.

Further, as shown in the first embodiment, in advance,
The amount of deviation of the optical axis for each focal length during focusing, or the fourth lens group holding frame 2 during AF operation
The amount of deviation of the optical axis for each of the 2R and 22L positions is recorded in the ROM
It records beforehand in 47.

Then, at the time of photographing, the focal lengths and the positions of the fourth lens group holding frames 22R and 22L are detected by the first and second lens barrels 1R and 1L, respectively, and the shift amount corresponding to these states is detected. The image cutout areas of the CCDs 16R and 16L are changed so as to make the correction.

According to the fifth embodiment as described above, it is possible to accurately correct the image shake caused by the hand shake and the frame shake in each of the left and right lens barrels, and also correct the deviation of the optical axis during zooming. Therefore, the photographer can always observe a stable and good image, and feel less tired.

18 to 20 show a sixth embodiment of the present invention. In the sixth embodiment, description of the same parts as those in the first to fifth embodiments will be omitted, and only different points will be mainly described.

The first lens barrel 1R and the second lens barrel 1R of this embodiment
The second lens barrel 21R, 21L
Zoom encoders 33 for detecting the respective positions of the
Are provided, and the camera detection circuit 43 detects the respective focal lengths based on the outputs of these zoom encoders 33.

That is, when a zoom switch (not shown) is pressed, the CPU is referred to while referring to the output of the camera detection circuit 43 which has obtained the detection result of the zoom encoder 33.
Reference numeral 46 denotes the second group lens frame 2 via the camera drive circuit 42.
The zoom motor 31R and the like are driven so that the positions of 1R and 21L are the same.

However, due to an assembly error or the like, even if the positions of the first lens barrel 1R and the second lens barrel 1L based on the output of the zoom encoder 33 are the same, the actual focal lengths are deviated, As shown in FIG. 18, the angles of view may differ from each other.

That is, the first lens barrel 1R and the second lens barrel 1L are arranged so that their optical axes OR and OL face the object 8, and the zoom encoder 33 outputs the same zoom signal. Even if the above is performed, for example, the angle of view of the second lens barrel 1L is substantially equal to 2θL corresponding to the design value, but the angle of view of the first lens barrel 1R is more than 2θL.
It may become wider as R.

In this case, the size of the subject image 8R on the right side image 61R and the size of the subject image 8L on the left side image 61L differ as shown in FIG. 19 (A).

In order to deal with such a difference in angle of view,
In the stereoscopic photographing apparatus of the present embodiment, the actual angle of view at each encoder reading value of the first and second lens barrels 1R and 1L is measured, and the deviation amount from the encoder reading value corresponding to the design value is described above. It writes in ROM47 beforehand.

Next, the operation of this embodiment will be described with reference to FIG. When zoom driving is performed by pressing a zoom switch or the like, first, a focal length corresponding to a design value based on the outputs of the left and right zoom encoders 33 is detected (step S41), and the detected focal length is determined. The shift amount of the angle of view between the left and right lens barrels 1R and 1L is set to
It is called from M47 (step S42).

Then, the image cutout areas of the CCDs 16R and 16L are calculated based on the shift amount called from the ROM 47 (step S43), and based on the calculation result, the designed angle of view is actually obtained. Each CCD 1
The image cutout areas of 6R and 16L are reduced or enlarged (step S44).

For example, in the case of the state as shown in FIG. 18, as shown in FIG. 19A, from the image 61R having a wider angle of view than the design value of the first lens barrel 1R to the second
An image 61L with an angle of view that substantially matches the design value of the lens barrel 1L
The image cutout area 75 corresponding to is calculated and changed.

As a result, as shown in FIG.
The angles of view of the images 56R and 56L displayed on the FMD 56 are the same, and the object images 8R 'and 8L on the images 56R and 56L are the same.
L'is the same size.

Note that the measurement of the angle of view deviation and the change of the image cutout area are performed with reference to either one of the first and second lens barrels 1R and 1L, instead of changing so as to match the design value. It is also possible to use a means for adjusting the deviation of the other.

According to the sixth embodiment as described above, the deviation of the focal lengths of the left and right lens barrels, that is, the deviation of the left and right angle of view, which is considerably large as a factor of fatigue when observing a stereoscopic image, is mechanically reduced. It is possible to make corrections without making any adjustments, and the photographer can observe a good image,
Less fatigue.

[Additional Notes] According to the above-described embodiment of the present invention as described in detail above, the following constitution can be obtained.

(1) A first photographing optical system having a first image pickup device for obtaining photographing information for the right eye, and a second photographing device having a second image pickup device for obtaining photographing information for the left eye. Image pickup optical system, a storage unit that stores in advance a predetermined deviation amount of the first image pickup optical system and the second image pickup optical system with respect to a predetermined reference, and the first image pickup based on an output from the storage unit. A stereoscopic image pickup apparatus comprising: a control unit that controls an image cutout area in at least one of the element and the second image pickup element.

(2) A first photographing optical system having a first image pickup element for obtaining photographing information for the right eye, and a second photographing element having a second image pickup element for obtaining photographing information for the left eye. Of the photographing optical system, detecting means for detecting image shake based on the photographing information obtained from both the first photographing optical system and the second photographing optical system, and based on the detection result of the detecting means,
A stereoscopic imaging apparatus comprising: a control unit that controls image cutout areas of the first image pickup device and the second image pickup device.

According to the invention described in appendix 1, it is possible to suppress the image shift that occurs in the taking optical system, and to reduce the feeling of fatigue given to the photographer.

According to the invention described in appendix 2, it is possible to detect the shake of the images of both the first and second photographing optical systems and suppress the deviation of the images generated in each of them. Therefore, there is little feeling of fatigue given to the photographer.

[0148]

As described above, according to the stereoscopic photographing apparatus of the first aspect of the invention, it is possible to suppress the image shift at each focal length which occurs in the photographing optical system due to the shift of the optical axis center. Therefore, there is little feeling of fatigue given to the photographer.

Further, according to the stereoscopic photographing apparatus of the second invention, it is possible to suppress the image shift at each focal length generated in the photographing optical system due to the shaking of the optical member supporting means, and the photographer There is little feeling of fatigue.

Further, according to the stereoscopic photographing apparatus of the third invention, the shake of the image is detected based on the photographing information obtained from one of the image pickup devices, and the first photographing optical system and the second photographing optical system are used. It is possible to suppress the shaking of the image generated in the photographing optical system, and the feeling of fatigue given to the photographer is small.

According to the stereoscopic photographing apparatus of the fourth invention, the main subjects in the first photographing optical system and the second photographing optical system are substantially recognized, and the positions of these main subjects in the image cutout area are determined. Since they are matched with each other, it is possible to suppress the deviation of the image generated in the photographing optical system, and the fatigue of the photographer is reduced.

In addition, according to the stereoscopic photographing device of the fifth aspect of the present invention, it is possible to suppress the shift of the image at each focal length which occurs in the photographing optical system due to the shift of the angle of view.
There is little feeling of fatigue given to the photographer.

[Brief description of drawings]

FIG. 1 is a plan sectional view showing an optical system of a stereoscopic photographing apparatus according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a zoom mechanism of the stereoscopic photographing apparatus of the first embodiment.

FIG. 3 is a plan view showing a state in which the first lens barrel and the second lens barrel of the first embodiment are assembled to a mechanical chassis so as to be rotatable.

FIG. 4 is a block diagram showing the configuration of the stereoscopic photographing apparatus of the first embodiment.

FIG. 5 is a diagram showing an example of an image when the stereoscopic photographing apparatus according to the first embodiment is wide.

FIG. 6 is a diagram showing a desirable example of an image at the time of telephoto in the stereoscopic photographing apparatus of the first embodiment.

FIG. 7 is a diagram showing an example of a case where a telescopic image is displaced in the stereoscopic photographing apparatus of the first embodiment.

FIG. 8 is a diagram showing an image cutout area for correcting a shift in the state of FIG. 7;

FIG. 9 is a flowchart showing the operation of the stereoscopic photographing apparatus according to the first embodiment.

FIG. 10 is a diagrammatic view showing a relationship between a momentary image shake amount occurring at the time of driving start or inversion in zooming or AF and time in the stereoscopic photographing apparatus according to the second embodiment of the present invention.

FIG. 11 is a flowchart showing the operation of the stereoscopic photographing device according to the second embodiment.

FIG. 12 is a perspective view showing a driving mechanism of a second lens group, which is a zoom lens, in the stereoscopic photographing apparatus according to the third embodiment of the present invention.

13A and 13B are a plan view and a front view showing a driving mechanism of a second lens group which is a zoom lens in the three-dimensional image pickup apparatus of the third embodiment.

FIG. 14 is a flowchart showing the operation of the stereoscopic photographing device according to the third embodiment.

FIG. 15 is a diagram showing an example when an image is misaligned in the stereoscopic imaging apparatus according to the fourth embodiment of the present invention.

16 is a diagram showing an image cutout area for correcting a deviation in the state of FIG.

FIG. 17 is a flowchart showing the operation of the stereoscopic photographing device according to the fourth embodiment.

FIG. 18 is a plan view showing an example in which an angle of view is deviated when photographing a subject in the stereoscopic photographing device according to the sixth embodiment of the present invention.

FIG. 19 is an image cutout area for correcting an image in which a shift in the angle of view occurs in the state of FIG. 18;
FIG. 6 is a diagram showing a corrected FMD image.

FIG. 20 is a flowchart showing the operation of the stereoscopic photographing device according to the sixth embodiment.

FIG. 21 is a plan view showing a state in which a conventional first lens barrel and a second lens barrel are assembled to a mechanical chassis.

[Explanation of symbols]

1R ... 1st lens-barrel (1st imaging optical system) 1L ... 2nd lens-barrel (2nd imaging optical system) 16R ... CCD (1st imaging element) 16L ... CCD (2nd imaging element) 21R, 21L ... Second group lens holding frame (optical member support means) 22R, 22L ... Fourth group lens holding frame (optical member support means) 43 ... Camera detection circuit (focal length detection means) 44 ... Left and right lens imaging circuit (Detection means) 45 ... Image pattern recognition circuit (subject recognition means) 46 ... CPU (control means) 47 ... ROM (storage means)

Claims (5)

[Claims] 1. A first photographing optical system having a first image pickup element for obtaining photographing information for the right eye, and a second photographing optical system having a second image pickup element for obtaining photographing information for the left eye. A photographing optical system, a focal length detecting means for detecting focal lengths of the first photographing optical system and the second photographing optical system, and a first photographing optical system and a second photographing optical system at each focal length. A storage unit that stores in advance the displacement amount of each optical axis center and an image cutout area in at least one of the first image pickup device and the second image pickup device at each focal length based on the output from the storage unit is set. A stereoscopic imaging apparatus comprising: a control unit for controlling. 2. A first photographing optical system having a first image pickup device for obtaining photographing information for the right eye, and a second photographing optical system having a second image pickup device for obtaining photographing information for the left eye. A photographing optical system, a storage unit that stores in advance the amount of shaking of the optical member supporting unit of the first photographing optical system and the second photographing optical system during driving, and at each focal length based on the output from the storage unit. A stereoscopic photographing apparatus comprising: a control unit that controls an image cutout area in at least one of the first image pickup device and the second image pickup device. 3. A first photographing optical system having a first image pickup device for obtaining photographing information for the right eye, and a second photographing optical system having a second image pickup device for obtaining photographing information for the left eye. An image pickup optical system, a detection unit that detects image shake based on image pickup information obtained from a predetermined one of the first image pickup device and the second image pickup device, and the detection unit detects image shake. In this case, the amount of shaking that is detected by one of the predetermined shooting optical systems is canceled by
The other photographic optical system is provided with a control means for controlling the image cut-out areas of the first image pickup device and the second image pickup device by an amount obtained by multiplying the amount for canceling the shake amount by a predetermined coefficient. Characteristic stereoscopic imaging device. 4. A first imaging optical system having a first imaging element for obtaining imaging information for the right eye, and a second imaging element having a second imaging element for obtaining imaging information for the left eye. A photographing optical system, a subject recognizing unit that substantially recognizes a main subject in the first photographing optical system and the second photographing optical system, and a main subject that is substantially recognized by the subject recognizing unit,
Control for controlling the image cutout area in at least one of the first image pickup element and the second image pickup element so that the positions of the first image pickup element and the second image pickup element in the image cutout area coincide with each other. A stereoscopic imaging apparatus comprising: a means. 5. A first photographing optical system having a first image pickup element for obtaining photographing information for the right eye, and a second photographing optical system having a second image pickup element for obtaining photographing information for the left eye. A photographing optical system, a focal length detecting means for detecting focal lengths of the first photographing optical system and the second photographing optical system, and a first photographing optical system and a second photographing optical system at each focal length. Controlling an image cutout area in at least one of the first image pickup device and the second image pickup device at each focal length based on an output from the storage device that stores the amount of deviation of each angle of view in advance. A stereoscopic photographing apparatus, comprising: