JP2013172217A - Stereoscopic video imaging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stereoscopic video imaging apparatus capable of automatically acquiring a correction value.SOLUTION: The stereoscopic video imaging apparatus comprises two imaging apparatuses each including a lens device including a drive optical system which can be driven and drive control means controlling the drive of the drive optical system on the basis of a drive command and a camera device imaging a subject image formed by the lens device. At least one of the two imaging apparatuses includes acquisition means acquiring the difference between the drive command being a position command corresponding to a predetermined reference position of the drive optical system and a correction drive command outputted to the drive control means, to drive the drive optical system to a position where an evaluation value obtained from a captured image coincides with a reference value corresponding to the predetermined reference position. At least the one imaging apparatus includes storage means storing the difference between the drive command acquired by the acquisition means and the correction drive command as a correction value.

Description

  The present invention relates to a stereoscopic video imaging apparatus that has two objective optical systems and captures stereo images with parallax, and in particular, a stereoscopic video having a function of correcting a difference in optical conditions between the two objective optical systems. The present invention relates to an imaging apparatus.

2. Description of the Related Art Conventionally, stereoscopic video imaging devices that capture stereoscopic video using left and right parallax are known. In this stereoscopic video imaging device, two lens devices having the same specifications are usually used.
However, even in the case of lens devices having the same specifications, individual differences and optical characteristic differences occur due to the influence of manufacturing errors and the like. Therefore, even when electrical conditions such as a command value to the optical member are matched, the position of the optical member corresponding to the command value to the optical member such as a zoom lens, a focus lens, and an iris (hereinafter, “ The optical conditions ”may be different.
If the optical conditions are different, the shooting magnification of the images shot by the respective imaging devices is different (in the case of a zoom lens), the amount of shooting light is different (in the case of an iris), or the focus is shifted (focus lens). In this case, a difference occurs between the images, which makes it difficult for the viewer to see.

  In order to solve this problem, Patent Document 1 proposes correcting electrical conditions such as parameters for controlling the zoom lens in order to match the optical conditions in the zoom lens. As a method of correcting the electrical condition, a correction value for driving the zoom lens is held in advance so that the optical condition between the two zoom lenses matches, and control is performed based on the correction value. It is.

Japanese Patent Laid-Open No. 9-187039

In the method of Patent Document 1, since the value of the correction value that is held is a fixed value (lookup table or the like), the photographing environment changes such as when the combination of lens devices to be used is changed or when the posture difference is changed. Cannot respond to.
Normally, it is necessary to apply a suitable correction value each time the shooting environment changes, such as when the combination of lens devices to be used changes or when the posture difference changes. Generally, in order to obtain the correction value, the image taken by the imaging device including a plurality of lens devices is visually searched for the position of the optical member for matching the conditions of each image. It took a long time to obtain correction values.
SUMMARY OF THE INVENTION An object of the present invention is to provide a stereoscopic video imaging apparatus that can automatically acquire a correction value of a drive command that commands driving of a drive optical system.

  In order to achieve the above object, a stereoscopic video imaging apparatus according to the present invention includes a drive optical system that can be driven, a lens device that includes a drive control unit that controls the drive of the drive optical system based on a drive command, and the lens. A stereoscopic video imaging device including two imaging devices each having a camera device that captures a subject image formed by the device, wherein the drive optical system in at least one of the two imaging devices In order to drive the drive optical system to a position where a drive command that is a position command corresponding to the predetermined reference position and an evaluation value obtained from the captured image coincides with a reference value corresponding to the predetermined reference position Acquisition means for acquiring a difference from a correction drive command issued to the drive control means, wherein the at least one imaging device is configured to receive the drive command acquired by the acquisition means and the complement. A storage means for storing a difference between a drive command as a correction value, characterized in that.

  According to the present invention, it is possible to provide a stereoscopic video imaging apparatus that can automatically acquire a correction value of a drive command that commands driving of a drive optical system.

FIG. 3 is a block diagram illustrating a configuration of a stereoscopic video imaging apparatus according to Embodiments 1 to 4. 6 is a table for storing reference control values in the first embodiment. The chart in Example 1 and 2. FIG. 5 is a flowchart for explaining correction value automatic acquisition processing according to the first embodiment. FIG. 6 is a diagram for explaining a method for comparing image sizes in the first embodiment. FIG. 6 is a diagram for explaining a method for comparing image sizes in the first embodiment. 5 is a flowchart for explaining a method for determining a zoom drive amount of a lens device to be corrected in the first embodiment. 10 is a table that stores reference control values, reference pixel numbers, and the like according to the second embodiment. 9 is a flowchart for explaining correction value automatic acquisition processing according to the second embodiment. 9 is a flowchart for explaining correction value automatic acquisition processing according to the second embodiment. 9 is a flowchart for explaining a method for determining a zoom drive amount of a correction target lens apparatus according to the second exemplary embodiment. 10 is a table for storing reference control values in the third embodiment. 9 is a flowchart for explaining correction value automatic acquisition processing according to the third embodiment. 10 is a flowchart for explaining a method for determining an iris driving amount of a correction target lens apparatus according to the third exemplary embodiment. 10 is a table that stores reference control values and reference luminance values according to the fourth embodiment. 10 is a flowchart for explaining correction value automatic acquisition processing according to the fourth embodiment. 10 is a flowchart for explaining correction value automatic acquisition processing according to the fourth embodiment. 10 is a flowchart for explaining a method for determining an iris drive amount of a lens apparatus to be corrected in the fourth embodiment. FIG. 10 is a block diagram illustrating a configuration of a stereoscopic video imaging apparatus according to a fifth embodiment. 10 is a table for storing a reference control value and a reference object distance in the fifth embodiment. 10 is a flowchart for explaining correction value automatic acquisition processing according to the fifth embodiment. 10 is a flowchart for explaining correction value automatic acquisition processing according to the fifth embodiment. 10 is a chart in Example 5.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In the embodiments described below, the electrical condition is described as a drive command (control value) for designating the position of the optical member with respect to an absolute predetermined reference position.

  Examples 1 and 2 are zoom operations, Examples 3 and 4 are iris operations, and Example 5 is a focus operation. The operation between each optical system is corrected by correcting the difference in optical conditions between the two objective optical systems. A stereoscopic video imaging apparatus that can be acquired as a correction value for tuning and a correction value acquisition method thereof will be described.

  Hereinafter, with reference to FIGS. 1 to 7, a stereoscopic video imaging apparatus according to a first embodiment of the present invention will be described.

  FIG. 1 is a block diagram illustrating a configuration at the time of correction value acquisition of the stereoscopic video imaging apparatus according to the embodiment of the present invention. In this figure, the stereoscopic image capturing apparatus includes a pair of lens apparatuses 100 and 200, a pair of camera apparatuses 150 and 250 that respectively capture subject images formed by the lens apparatus, a correction value acquisition processing unit 300, and a chart. 500. The correction value acquisition processing unit 300 can be configured by a PC, for example.

  The lens apparatus 100 includes a zoom mechanism including a zoom lens group 105 which is a drive optical system that can be driven, a zoom motor 106, a zoom driver 107, and a zoom position detection unit 108. The zoom lens group 105 is moved in the optical axis direction by a zoom motor 106 driven by a zoom driver 107. The position of the zoom lens group 105 is detected by the zoom position detector 108.

  The lens apparatus 100 includes a CPU 120. The CPU 120 includes a control unit 121, a drive control unit 122 as drive control means, and a correction value storage unit 123 as correction value storage means, which will be described later. The control unit 121 outputs a command value (drive command) for driving the zoom lens group 105 to a drive control unit 122 described later based on a command value given from the outside of the lens apparatus 100 via the communication unit 130. To do. The drive control unit 122 moves the zoom lens group 105 to a target position in the optical axis direction via the zoom driver 107 and the zoom motor 106.

The correction value storage unit 123 stores correction information including the correction value acquired by the correction value acquisition processing unit 300. The correction value will be described later.
The communication unit 130 outputs a drive command input from an operation member (not shown) and a command value obtained from the correction value acquisition processing unit 300 to the control unit 121.

  The camera device 150 includes an image sensor 151 and an image processing unit 152. The image sensor 151 receives a light beam that has passed through an optical system including the zoom lens group 105, photoelectrically converts it, and outputs the result. The image processing unit 152 converts the photoelectrically converted signal into an image signal and outputs the image signal to the correction value acquisition processing unit 300.

  Since the lens device 200 and the camera device 250 have the same configuration as the lens device 100 and the camera device 150, description thereof will be omitted. The lens device 100 and the camera device 150 constitute a first imaging system, and the lens device 200 and the camera device 250 constitute a second imaging system.

  In this embodiment, the lens device 100 will be described below as a lens device to which correction is applied, and the lens device 200 will be described as a lens device that uses the optical conditions for the lens device 100 as a reference.

  The correction value acquisition processing unit 300 in FIG. 1 includes an image input unit 301, a CPU 302, and a communication unit 303. The image input unit 301 outputs image signals obtained from the image processing units 152 and 252 to the CPU 302. The CPU 302 outputs a control value (drive command) stored in a reference value storage unit (not shown) in the correction value acquisition processing unit 300 to the control units 121 and 221 via the communication units 303, 130, and 230. To do.

The reference value storage unit stores, for example, the table of FIG. 2 as control values. The table in FIG. 2 stores reference control values (drive commands) CZi (i: 1 to 5) for commanding driving to a zoom position (drive position) for obtaining a correction value. This reference control value is a drive command that commands a position relative to an absolute reference position. At this time, as described above, the CPU 302 designates the reference control value CZi to the control units 121 and 221 via the communication units 130 and 230 in accordance with the index order of the table, and designates the position of the zoom lens drive destination. Output as a command. The control units 121 and 221 drive the zoom lens groups 105 and 205 to positions corresponding to the reference control value CZi, respectively.
Further, the control units 121 and 221 store the correction values acquired by the correction value acquisition processing unit 300 in the correction value storage units 123 and 223, respectively, as correction values for the reference control value CZi.

  In addition, the CPU 302 calculates the image size of the specific subject image in the image obtained from the image input unit 301 after the control units 121 and 221 drive the zoom lens groups 105 and 205 to a position corresponding to the control value CZi. The two calculated image sizes are compared. When the image size of the specific subject image (or a value corresponding to the image size of the specific subject image (a value that changes corresponding to the change in the image size of the specific subject image)) matches, the angle of view of the lens devices 100 and 200 It is detected that the values (or values corresponding to the angle of view (values that change corresponding to changes in the angle of view)) match. When the image sizes of the specific subject images do not match, the drive amount of the zoom lens group 105 is calculated from the image size comparison result, and a drive command value corresponding to the drive amount is output to the control unit 121. At this time, in order to drive only the zoom lens group of the lens apparatus to which the correction is applied, the drive command value is output only to the lens apparatus 100.

  For example, a chart 500 shown in FIG. 3 is used as a subject to be imaged by the stereoscopic video imaging device in order to obtain a specific subject image when the correction value is automatically acquired. The CPU 302 calculates the number of pixels in the white portion using the white portion of the chart shown in FIG. 3 as the image size of the specific subject. Also, the numbers (1) to (5) in FIG. 3 are used at the time of evaluation in a state where the control values are moved to the zoom positions corresponding to the index numbers 1 to 5 in the table of FIG. For example, when the control value CZ1 of the index 1 in the table of FIG. 2 is output, the CPU 302 calculates the number of pixels of the white part (1) from the captured image of the chart of FIG. Further, when the control value CZ5 of the index 5 in the table of FIG. 2 is output, the CPU 302 calculates the number of pixels of the white portion (5) from the captured image of the chart of FIG. The chart used for comparison between the imaging systems can be applied to any subject that falls within the captured image, but the higher the accuracy of the subject image over a wider area in the image screen, the higher the comparison can be made.

  In this embodiment, the chart 500 is described as an example, but the present invention is not limited to this pattern. If the chart is a pattern having a symmetrical shape with respect to the midpoint of the two optical axes in the direction connecting the optical axes in a plane perpendicular to the optical axes of the two lens devices 100 and 200 when installed. Good.

  Next, a series of correction value automatic acquisition processing of the stereoscopic video imaging apparatus in the present embodiment will be described with reference to the flowchart of FIG.

First, the chart 500 is installed so that the object distances from the lens apparatuses 100 and 200 are equal.
The correction value acquisition processing unit 300 controls these processes according to a computer program stored in a memory (not shown).

In step S100, the index is initialized to 1, and the process proceeds to step S110.
In step S110, the CPU 302 uses the control value CntZS for the correction target lens device 100 as the reference value CZ1 corresponding to the index 1 in the table of FIG. To the control units 121 and 221 via the communication unit 303 and the communication units 130 and 230. The drive controllers 122 and 222 move the zoom lens groups 105 and 205 to target positions in the optical axis direction via the zoom drivers 107 and 207 and the zoom motors 106 and 206, respectively.

  In step S120, the CPU 302 calculates the number of pixels of the specific subject image from the image signals obtained from the image processing units 152 and 252 after the zoom lens groups 105 and 205 are driven to the position corresponding to the control value CZ1 in step S110. calculate. Here, a method of calculating the number of pixels of the specific subject image will be described with reference to FIG.

  FIGS. 5A and 5B are images obtained from the image processing units 152 and 252 when the stereoscopic video imaging apparatus according to the present embodiment captures the chart of FIG. In step S110, since the zoom lens groups 105 and 205 are driven to the position corresponding to the control value CZ1, the CPU 302 calculates the number of pixels in the white portion of (1) in FIGS. As a white portion detection method, an edge detection method may be used to detect an edge that changes from white to black when viewed from the center of the chart.

  The lens device 100 of one imaging system is set as a correction target, and the lens device 200 of the other imaging system is used as a reference. FIG. 5A shows an image (hereinafter referred to as a Slave image) obtained from the image processing unit 152 of the camera device 150 connected to the lens device 100, and the number of slave image pixels Vps at this time is N_a1. Suppose there is. FIG. 5B shows an image (hereinafter referred to as a “Master image”) obtained from the image processing unit 252 of the camera apparatus 250 connected to the reference lens apparatus 200, and the number of master image pixels Vpm at this time. Is N_b1. In this embodiment, the case where the pixel numbers N_a1 and N_b1 are different values and N_a1 <N_b1 is illustrated.

Returning to the flowchart of FIG. In step S130, the number of master image pixels Vpm and the number of slave image pixels Vps are compared, and when the number of master image pixels Vpm and the number of slave image pixels Vps do not match, as in the examples of FIGS. Proceed to step S170.
In step S <b> 170, the CPU 302 determines a drive command value for driving the zoom lens group 105 of the correction target lens device 100 based on the values of the master image pixel number Vpm and the slave image pixel number Vps. The correction target lens zoom drive amount determination in step S170 will be described with reference to the flowchart of FIG.

  In step S171 in FIG. 7, when the number of slave image pixels Vps is smaller than the number of master image pixels Vpm, the process proceeds to step S172, and the CPU 302 determines a drive amount for driving the zoom lens group 105 in the tele direction. This drive amount may be an amount corresponding to the difference between the number of master image pixels Vpm and the number of slave image pixels Vps, or may be an amount for driving to a zoom position separated by a predetermined interval.

On the other hand, when the number of slave image pixels Vps is larger than the number of master image pixels Vpm in step S171, the process proceeds to step S173, and the CPU 302 determines a drive amount for driving the zoom lens group 105 in the wide direction. Similar to step S172, the amount may be an amount corresponding to the difference between the number of master image pixels Vpm and the number of slave image pixels Vps, or may be an amount for driving to a zoom position separated by a predetermined interval.
When the zoom drive amount is determined in step S172 or step S173, the process proceeds to step S180 in FIG.

In step S180, the CPU 302 obtains a drive command value (a control value for designating the position of the zoom lens group 105 with respect to the absolute reference position) CntZS corresponding to the zoom drive amount determined in step S170, as the communication unit 303 and the communication unit. The data is output to the control unit 121 via 130. Then, the process returns to step S120.
In step S130, the CPU 302 repeats steps S170, S180, and S120 until the master image pixel number Vpm matches the slave image pixel number Vps.

FIG. 5C shows an image obtained from the image processing unit 152 when the number of slave image pixels Vps matches the number of master image pixels Vpm (Vps = Vpm = N_b1) in step S130.
In step S130, when the number of master image pixels Vpm calculated in step S120 matches the number of slave image pixels Vps, the process proceeds to step S140.

  In step S140, the CPU 302 (acquiring means) controls the control value (drive command) CntZM (= CZ1) for the reference lens apparatus 200 in step S110 and the control value (correction drive command) for the lens apparatus 100 to be corrected in step S170. ) A difference from CntZS (CntZM−CntZS) is acquired as a correction value, and is output to the control unit 121 via the communication units 303 and 130. The control unit 121 stores the correction value and the control value CZ1 in the correction value storage unit 123. Here, the drive command that is a position command corresponding to a predetermined reference position of the drive optical system that is the drive target and the evaluation value obtained from the captured image are driven to a position that matches the reference value corresponding to the predetermined reference position. A difference from a correction drive command issued to the drive control means for driving the optical system (when driven) is used as a correction value.

In step S150, the CPU 302 advances the reference value index stored in the reference value storage unit by one, and proceeds to step S160.
In step S160, it is determined whether or not the index is greater than a predetermined number (in the present embodiment, the predetermined number is 5). If the predetermined number is not exceeded, the process returns to step S110, the same processing as described above is performed, and the correction value in the control value corresponding to the index is acquired.

  6 (a) and 6 (b), in step S150, the above processing is repeated to advance the index to 5, and then return to step S110. Immediately thereafter, the image processing units 152 and 252 in step S120 are performed. It is the image obtained from. In this embodiment, CZ1 is the wide-side control value, CZ5 is the tele-side control value, and FIG. 6 shows the state (5) of the chart shown in FIG. Represents. Since the control value CZ5 of the index 5 is output, the CPU 302 calculates the number of pixels in the white part of (5) in FIGS. 6 (a) and 6 (b).

FIG. 6A shows a Slave image, and the number of pixels Vps of the Slave image at this time is N_a5. FIG. 6B shows a master image, and it is assumed that the master image pixel number Vpm at this time is N_b5. In this embodiment, the number of pixels N_a5 and N_b5 are different values, and N_a5 <N_b5 is exemplified.
As in the case of the control value CZ1, the CPU 302 repeats Step S170, Step S180, and Step S120 until the Master image pixel number Vpm matches the Slave image pixel number Vps in Step S130.

FIG. 6C illustrates an image obtained from the image processing unit 152 when the number of slave image pixels Vps matches the number of master image pixels Vpm in step S130.
In step S130, when the number of slave image pixels Vps matches the number of master image pixels Vpm, the process proceeds to step S140.

In step S140, communication is performed using the difference (CntZM−CntZS) between the control value CntZM (= CZ5) for the reference lens apparatus 200 in step S110 and the control value CntZS for the correction target lens apparatus 100 in step S170. The data is output to the control unit 121 via the units 303 and 130. The control unit 121 stores the correction value and the control value CZ5 in the correction value storage unit 123.
If the predetermined number is exceeded in step S160, it is determined that correction values have been acquired for all reference control values, and the correction value acquisition process is terminated.

  As described above, according to the present embodiment, it is possible to provide a stereoscopic image pickup apparatus that can automatically acquire a correction value for synchronizing the zoom operation between two lens apparatuses. Can do. Therefore, when the shooting environment changes, such as when the combination of lens devices used changes or when the posture difference changes, an appropriate correction value is applied each time to synchronize the zoom movements of the two lens devices. Is possible.

In this embodiment, it is described that the coincidence of the angle of view between the lens device 100 to be corrected and the reference lens device 200 is detected based on the coincidence of the number of pixels of the specific subject image calculated from the image obtained by photographing the chart of FIG. However, the following method may be used.
For example, the correlation calculation of the luminance values (or values corresponding to the luminance (values that change corresponding to the luminance change)) of the two images obtained by photographing the chart of FIG. 3 obtained from the image processing units 152 and 252 is performed. Thus, it is detected that the angle of view (or the value corresponding to the angle of view (the value that changes corresponding to the change of the angle of view)) of the lens device 100 to be corrected and the reference lens device 200 matches. Also good. That is, it may be detected that the angles of view match by paying attention to the degree of coincidence between the two images.

In this embodiment, the lens device to be corrected is described as the lens device 100, and the lens device that is used as a reference is the lens device 200. However, the lens device that is the correction target is the lens device 200, and the lens device that is used as the reference is the lens device 100. However, the same effect can be obtained.
The reference control values stored in the table of FIG. 2 may be arbitrarily changed by the user. In the present embodiment, the reference value storage unit is not an essential configuration, and other configurations may be used as long as the same control value can be set for the correction target lens device and the reference lens device.

  In the description of the present embodiment, when a certain value for the lens device to be corrected (in the above example, the number of pixels of the specific image of the chart) matches the value for the reference lens device, it is determined that the correction is completed. However, the present invention is not limited to this. When the difference between the value on the correction target lens side and the value on the reference lens side falls within a predetermined range, it may be determined that the correction is completed.

  Hereinafter, a stereoscopic video imaging apparatus according to a second embodiment of the present invention will be described with reference to FIGS. 1, 3, and 8 to 11 again. Here, description of what has already been described in the first embodiment is omitted.

  In the first embodiment, the lens device 100 of one imaging system is a lens device to which correction is applied, and the lens device 200 of the other imaging system is used as a reference for optical conditions when acquiring a correction value. It was. In this embodiment, the lens devices to which correction is applied are the lens devices 100 and 200, and the optical condition reference for acquiring the correction value is stored in a memory (not shown) of the correction value acquisition processing unit 300. A method for acquiring a correction value as a reference value is described. Also in this embodiment, the chart shown in FIG.

Here, specific differences from the first embodiment will be described.
In this embodiment, a reference value storage unit (not shown) stores, for example, the table of FIG. The table in FIG. 2 described in the first embodiment stores reference control values CZi (i: 1 to 5) that are zoom positions (drive positions) for acquiring correction values. The table in FIG. 8 further stores the reference pixel number N_si corresponding to the index and distance information (distance D) from the lens apparatus when the chart in FIG. 3 is installed.

This is because when the zoom lens groups 105 and 205 are located at the target position corresponding to the control value CZi, the white portion of the chart of FIG. 3 located at the distance D (the number corresponding to the index of the table). It represents the standard that the number of pixels should be N_si.
In the first embodiment, the number of slave image pixels Vps and the number of master image pixels Vpm are compared and adjusted so that the number of slave image pixels Vps matches the number of master image pixels Vpm. The difference is that the reference number N_si is used as a reference.

  Next, a series of correction value automatic acquisition processing of the imaging apparatus according to the present embodiment will be described with reference to the flowcharts of FIGS. 9 to 11.

First, the chart 500 is installed such that the distance from the lens device 100 is D.
The correction value acquisition processing unit 300 controls these processes according to a computer program stored in a memory (not shown).

First, in step S1200 of FIG. 9, the CPU 302 performs a correction value acquisition process in the lens device 100, proceeds to step S2200, and performs a correction value acquisition process in the lens device 200.
Here, the correction value acquisition processing in the lens apparatus 100 in step S1200 will be described with reference to the flowchart of FIG.
In step S200, the index value is initialized to 1, and the process proceeds to step S210.

  In step S210, the CPU 302 sets CZ1, which is a control value (drive command) corresponding to index 1 in the table of FIG. 8 stored in the reference value storage unit, as the control value CntZS for the lens device 100 to be corrected. And output to the control unit 121 via the communication unit 303. The drive control unit 122 moves the zoom lens group 105 to a target position in the optical axis direction via the zoom driver 107 and the zoom motor 106.

  In step S220, the CPU 302 calculates the number of pixels of the specific subject image from the image signal obtained from the image processing unit 152 after the zoom lens group 105 is driven to the position corresponding to the control value CZ1 in step S210. The method for calculating the number of pixels of the specific subject image is the same as in the first embodiment. The chart of FIG. 3 is imaged, and the number of pixels in the white portion with the number corresponding to the index in the table of FIG. 8 is calculated. This number of pixels is the number of pixels of the image obtained from the image processing unit 152 of the camera device 150 connected to the lens device 100 to be corrected. In this embodiment, as in the first embodiment, the Slave image pixel This is called several Vps.

Returning to the flowchart of FIG. In step S230, the number of slave image pixels Vps is compared with the number of pixels N_s1 corresponding to index 1 in the table of FIG. 8, and when the number of slave image pixels Vps and N_s1 do not match, the process proceeds to step S270.
In step S270, a drive command value for driving the zoom lens group 105 is determined based on the values of the number of slave image pixels Vps and N_s1.

The correction target lens zoom drive amount determination in step S270 will be described with reference to the flowchart of FIG.
When the number of slave image pixels Vps is smaller than N_s1 in step S271 in FIG. 11, the process proceeds to step S272, and the CPU 302 determines a drive amount for driving the zoom lens group 105 in the tele direction. This drive amount may be an amount corresponding to the difference between the number of slave image pixels Vps and N_s1, or may be an amount for driving to a zoom position separated by a predetermined interval.

On the other hand, when the number of slave image pixels Vps is larger than N_s1 in step S271, the process proceeds to step S273, and the CPU 302 determines a driving amount for driving the zoom lens group 105 in the wide direction. Similar to step S272, an amount corresponding to the difference between the number of slave image pixels Vps and N_s1, or an amount for driving to a zoom position separated by a predetermined interval may be used.
If the zoom drive amount is determined in step S272 or step S273, the process proceeds to step S280.

In step S280, the CPU 302 sends a drive command value (control value for designating the position of the zoom lens group 105 with respect to the absolute reference position) CntZS corresponding to the zoom drive amount determined in step S270 via the communication unit 303. , Output to the control unit 121, and return to step S220.
In step S230, the CPU 302 repeats step S270, step S280, and step S220 until the number of slave image pixels Vps matches N_s1.

In step S230, when the number of slave image pixels Vps calculated in step S220 matches N_s1, the process proceeds to step S240.
In step S240, the CPU 302 (acquiring means) uses the difference (CZ1−CntZS) between the control value (drive command) CZ1 and the control value (correction drive command) CntZS for the correction target lens apparatus 100 in step S270 as a correction value. The information is acquired and output to the control unit 121 via the communication units 303 and 130. The control unit 121 stores the correction value and the control value CZ1 in the correction value storage unit 123.

In step S250, the CPU 302 advances the reference value index stored in the reference value storage unit by one, and proceeds to step S260.
In step S260, it is determined whether or not the index is greater than a predetermined number (in the present embodiment, the predetermined number is 5). If the predetermined number is not exceeded, the process returns to step S210, the same processing as described above is performed, and the correction value in the control value corresponding to the index is acquired. On the other hand, in step S260, when the predetermined number is exceeded (in this embodiment, the predetermined number is 5), it is determined that correction values have been acquired for all reference control values, and correction values are acquired in the lens apparatus 100. The process ends.

  Subsequently, the CPU 302 proceeds to step S2200 in FIG. 9, executes the correction value acquisition process in the lens device 200, and finishes the correction value acquisition process, but the same procedure as the correction value acquisition process in the lens apparatus 100 described above. Will not be described.

As described above, according to the present embodiment, it is possible to provide a stereoscopic image pickup apparatus that can automatically acquire a correction value for synchronizing the zoom operation between two lens apparatuses. Can do. Therefore, when the shooting environment changes, such as when the combination of lens devices used changes or when the posture difference changes, an appropriate correction value is applied each time to synchronize the zoom movements of the two lens devices. Is possible.
Further, the reference control value and the reference pixel number stored in the table of FIG. 8 may be arbitrarily changed by the user.

  In the present embodiment, the correction values are automatically acquired in the lens apparatuses 100 and 200. However, since the reference value for acquiring the correction values is stored in the reference value storage unit, the lens apparatus. Even if there is only one, the correction value can be automatically acquired. Further, according to the present embodiment at another time, even if the stereoscopic image capturing apparatus is configured together with the lens apparatus that automatically acquired the correction value, the zoom operations of the two lens apparatuses can be synchronized.

Hereinafter, a stereoscopic video imaging apparatus according to a third embodiment of the present invention will be described with reference to FIGS. 1 and 12 to 14 again.
Here, description of what has already been described in the first and second embodiments is omitted.

  1 includes an iris mechanism including an iris diaphragm 109, which is a drive optical system that can be driven, an iris motor 110, an iris driver 111, and an iris position detector 112. The iris diaphragm 109 is opened and closed by an iris motor 110 driven by an iris driver 111. The position of the iris diaphragm 109 is detected by the iris position detector 112. The control unit 121 outputs a command value for driving the iris diaphragm 109 to the drive control unit 122 described later based on the command value obtained via the communication unit 130. The drive control unit 122 opens and closes the iris diaphragm 109 to the target position via the iris driver 111 and the iris motor 110.

Here, the camera device 150 includes an image sensor 151 and an image processing unit 152. The image sensor 151 receives the light beam that has passed through the optical system including the iris diaphragm 109, photoelectrically converts it, and outputs it.
Since the lens device 200 and the camera device 250 have the same configuration as the lens device 100 and the camera device 150, description thereof will be omitted.

  Similarly to the first embodiment, the lens device 100 of one imaging system is a lens device to which correction is applied, and the lens device 200 of the other imaging system is a lens device that uses the optical condition of the lens device 100 as a reference. This will be described below.

The CPU 302 outputs a control value stored in a reference value storage unit (not shown) to the control units 121 and 221 via the communication units 303, 130, and 230.
Here, the reference value storage unit stores, for example, the table of FIG. 12 as the control value. The table in FIG. 12 stores reference control values (drive commands) CIi (i: 1 to 5) that serve as iris positions (drive positions) from which correction values are acquired. At this time, as described above, the CPU 302 outputs the reference control value CIi to the control units 121 and 221 in the order of the indexes in the table. The control units 121 and 221 drive the iris diaphragms 109 and 209 to positions corresponding to the reference control value CIi, respectively.

  In addition, the CPU 302 causes the control units 121 and 221 to drive the iris diaphragms 109 and 209 to a position corresponding to the control value CIi, and then the luminance value (or the value corresponding to the luminance ( A value that changes in response to a change in brightness)) is calculated, and the two calculated brightness values are compared. The drive amount of the iris diaphragm 109 is calculated from the luminance value comparison result, and a drive command value corresponding to the calculated drive amount is output to the control unit 121 via the communication unit 303. At this time, in order to drive only the iris diaphragm of the lens apparatus to which the correction is applied, the drive command value is output only to the lens apparatus 100.

  A chart 500 is a subject that is imaged by the stereoscopic image capturing apparatus when the correction value is automatically acquired. The chart 500 in the present embodiment is desirably a chart in which equal uniform light is incident on the lens apparatuses 100 and 200.

  Next, a series of correction value automatic acquisition processing of the stereoscopic video imaging apparatus in the present embodiment will be described with reference to the flowcharts of FIGS. 13 and 14.

First, the chart 500 is placed so that uniform light equal to the lens devices 100 and 200 is incident thereon.
The correction value acquisition processing unit 300 controls these processes according to a computer program stored in a memory (not shown).

  In step S310, the CPU 302 obtains CI1 that is a control value (drive command) corresponding to index 1 of the table of FIG. Is set to a control value CntIM for the lens device 200 to be output to the control units 121 and 221 via the communication unit 302. The drive control units 122 and 222 open and close the iris diaphragms 109 and 209 to the target positions via the iris drivers 111 and 211 and the iris motors 110 and 210, respectively.

In step S320, the CPU 302 calculates the luminance value of the image from the image signal obtained from the image processing unit 152 after the iris diaphragms 109 and 209 are driven to the position corresponding to the control value CI1 in step S310.
Regarding the calculation of the luminance value, since the equal uniform light is incident on the lens devices 100 and 200 respectively, the luminance values of the pixels in the corresponding areas on the imaging elements 151 and 251 or all the pixels are calculated. The average should be taken.

  The luminance value of an image (hereinafter referred to as “Slave image”) obtained from the image processing unit 152 of the camera device 150 connected to the lens device 100 to be corrected is referred to as “Slave image luminance value Vbs”. In addition, the luminance value of an image (hereinafter referred to as “Master image”) obtained from the image processing unit 252 of the camera device 250 connected to the reference lens device 200 is referred to as “Master image luminance value Vbm”.

Next, when the absolute value of the difference between the Slave image luminance value Vbs and the Master image luminance value Vbm is larger than the threshold value ThVb in step S330, the process proceeds to step S370.
In step S370, a drive command value for driving the iris diaphragm 109 is determined based on the master image luminance value Vbm and the slave image luminance value Vbs.

The correction target lens zoom drive amount determination in step S370 will be described with reference to the flowchart of FIG.
In step S371 in FIG. 14, when the Slave image luminance value Vbs is smaller than the Master image luminance value Vbm, the process proceeds to step S372, and the CPU 302 determines a driving amount for driving the iris diaphragm 109 in the open direction. The driving amount may be an amount corresponding to the difference between the Master image luminance value Vbm and the Slave image luminance value Vbs, or may be an amount for driving to an iris position separated by a predetermined interval.

  On the other hand, when the Slave image luminance value Vbs is larger than the Master image luminance value Vbm in step S371, the process proceeds to step S373, and the CPU 302 determines a driving amount for driving the iris diaphragm 109 in the closing direction. As in step S372, the amount may be an amount corresponding to the difference between the Master image luminance value Vbm and the Slave image luminance value Vbs, or may be an amount for driving to an iris position separated by a predetermined interval.

If the iris drive amount is determined in step S372 or step S373, the process proceeds to step S380 in FIG.
In step S380, the CPU 302 sends a drive command value (control value for designating the iris diaphragm 109 with respect to the absolute reference iris position) CntIS corresponding to the iris driving quantity determined in step S370 via the communication unit 303. Is output to the control unit 121, and the process returns to step S320.

In step S330, the CPU 302 repeats steps S370, S380, and S320 until the absolute value of the difference between the Slave image luminance value Vbs and the Master image luminance value Vbm is equal to or less than the threshold value ThVb.
In step 330, when the absolute value of the difference between the Slave image luminance value Vbs and the Master image luminance value Vbm calculated in step S320 is equal to or less than the threshold value ThVb, the process proceeds to step S340.

  In step S340, the CPU 302 (acquisition means) controls the control value (drive command) CntIM (= CI1) for the reference lens device 200 in step S310 and the control value (correction drive command) for the correction target lens device 100 in step S370. ) A difference from CntIS (CntIM−CntIS) is acquired as a correction value, and is output to the control unit 121 via the communication units 303 and 130. The control unit 121 stores the correction value and the control value CI1 in the correction value storage unit 123.

In step S350, the CPU 302 advances the index of the reference value stored in the reference value storage unit by one, and proceeds to step S360.
In step S360, it is determined whether or not the index is larger than a predetermined number (in the present embodiment, the predetermined number is 5). If the predetermined number is not exceeded, the process returns to step S310, the same processing as described above is performed, and the correction value in the control value corresponding to the index is acquired.
On the other hand, if the predetermined number is exceeded in step S360, it is determined that correction values have been acquired for all reference control values, and the correction value acquisition process is terminated.

  As described above, according to the present embodiment, it is possible to provide a stereoscopic image pickup apparatus that can automatically acquire a correction value for synchronizing the operation of an iris between two lens apparatuses. Can do. Therefore, when the shooting environment changes, such as when the combination of lens devices used changes or when the posture difference changes, an appropriate correction value is applied each time to synchronize the zoom movements of the two lens devices. Is possible.

In this embodiment, the lens device to be corrected is described as the lens device 100, and the lens device that is used as a reference is the lens device 200. However, the lens device that is the correction target is the lens device 200, and the lens device that is used as the reference is the lens device 100. However, the same effect can be obtained.
Further, the reference control values stored in the table of FIG. 12 may be arbitrarily changed by the user.

  Hereinafter, a stereoscopic video imaging apparatus according to a fourth embodiment of the present invention will be described with reference to FIGS. 1 and 15 to 18 again. Here, description of what has already been described in the first to third embodiments is omitted.

  In the third embodiment, the lens apparatus 100 of one imaging system is a lens apparatus to which correction is applied, and the optical condition for acquiring a correction value when correcting the lens apparatus 200 of the lens apparatus 200 of the other imaging system is used. The lens device used as a reference for In this embodiment, the lens devices to which correction is applied are the lens devices 100 and 200, and the optical condition reference for acquiring the correction value is stored in a memory (not shown) of the correction value acquisition processing unit 300. A method for acquiring a correction value as a reference value is described.

Here, specific differences from the third embodiment will be described.
In this embodiment, a reference value storage unit (not shown) stores, for example, a table shown in FIG. In the table of FIG. 12 described in the third embodiment, reference control values (drive commands) CIi (i: 1 to 5) serving as iris positions (drive positions) for acquiring correction values are stored. The table of FIG. 15 further includes a reference luminance value N_Isi corresponding to the index, illuminance (illuminance L) of the chart 500, and distance information (distance D) from the lens apparatus 100 when the chart 500 is installed. Stored.

This is because, when the iris diaphragms 109 and 209 are located at the target position corresponding to the control value CIi, when the chart that emits uniform light with the illuminance L located at the object distance D is imaged, It represents the standard that the luminance value should be N_Isi.
In the third embodiment, the CPU 302 uses the master image luminance value Vbm as a reference when comparing the slave image luminance value Vbs. In this embodiment, the CPU 302 uses the reference luminance value N_Isi as a reference.

  Next, a series of correction value automatic acquisition processing of the imaging apparatus according to the present embodiment will be described with reference to the flowcharts of FIGS.

First, the chart 500 is installed so that the distance from the lens apparatus 100 is D.
The correction value acquisition processing unit 300 controls these processes according to a computer program stored in a memory (not shown).

  First, in step S1400 of FIG. 16, the CPU 302 performs a correction value acquisition process in the lens device 100, and proceeds to step S2400 to execute a correction value acquisition process in the lens device 200.

Here, the correction value acquisition processing in the lens apparatus 100 in step S1400 will be described with reference to the flowchart of FIG.
In step S410, the CPU 302 sets CI1 that is the control value of index 1 in the table of FIG. 15 stored in the reference value storage unit as the control value CntIS for the lens device 100 to be corrected, and via the communication unit 303. Output to the control unit 121. The drive control unit 122 opens and closes the iris diaphragm 109 to the target position via the iris driver 111 and the iris motor 110.

  In step S420, the CPU 302 calculates the slave image luminance value Vbs of the image from the image signal obtained from the image processing unit 152 after the iris diaphragm 109 is driven to the position corresponding to the control value CI1 in step S410. The method for calculating the luminance value is the same as in the third embodiment.

Next, in step S430, the Slave image luminance value Vbs is compared with the luminance value N_Is1 corresponding to the index 1 in the table of FIG. 15, and when the absolute value of the difference between the Slave image luminance value Vbs and N_Is1 is larger than the threshold value ThVb, Proceed to step S470.
In step S470, a drive command value for driving the iris diaphragm 109 is determined based on the values of the Slave image luminance value Vbs and N_Is1.

Determination of the correction target iris diaphragm drive amount in step S470 will be described with reference to the flowchart of FIG.
In step S471 in FIG. 18, when the Slave image luminance value Vbs is larger than N_Is1, the process proceeds to step S472, and the CPU 302 determines a driving amount for driving the iris diaphragm 109 in the closing direction. This drive amount may be an amount corresponding to the difference in N_Is1 of the Slave image luminance value Vbs, or may be an amount for driving to an iris position separated by a predetermined interval.

  On the other hand, when the Slave image luminance value Vbs is smaller than N_Is1 in step S471, the process proceeds to step S473, and the CPU 302 determines a drive amount for driving the iris diaphragm 109 in the open direction. Similar to step S472, an amount corresponding to the difference between the Slave image luminance values Vbs and N_Is1 may be used, or an amount for driving to an iris position separated by a predetermined interval.

If the iris driving amount is determined in step S472 or step S473, the process proceeds to step S480.
In step S480, the CPU 302 sends a drive command value (control value for designating the iris diaphragm 109 with respect to the absolute reference iris position) CntIS corresponding to the iris driving quantity determined in step S470 via the communication unit 303. Is output to the control unit 121, and the process returns to step S420.
In step S430, the CPU 302 repeats step S470, step S480, and step S420 until the absolute value of the difference between the Slave image luminance value Vbs and N_Is1 is equal to or less than the threshold value ThVb.

In step S430, when the absolute value of the difference between the Slave image luminance value Vbs and N_Is1 calculated in step S420 is equal to or less than the threshold value ThVb, the process proceeds to step S440.
In step S440, the CPU 302 (acquiring means) uses the difference (CI1−CntIS) between the control value (drive command) CI1 and the control value (correction drive command) CntIS for the correction target lens device 100 in step S470 as a correction value. The information is acquired and output to the control unit 121 via the communication units 303 and 130. The control unit 121 stores the correction value and the control value CI1 in the correction value storage unit 123.

In step S450, CPU 302 advances the index of the reference value stored in the reference value storage unit by one, and proceeds to step S460.
In step S460, it is determined whether or not the index is larger than a predetermined number (in the present embodiment, the predetermined number is 5). If the predetermined number is not exceeded, the process returns to step S410, the same processing as described above is performed, and the correction value in the control value corresponding to the index is acquired.
If the predetermined number is exceeded in step S460, it is determined that correction values have been acquired for all reference control values, and the correction value acquisition processing in the lens apparatus 100 is terminated.

  Subsequently, the CPU 302 proceeds to step S2400 in FIG. 16 to execute the correction value acquisition process in the lens device 200 and finish the correction value acquisition process, but the same procedure as the correction value acquisition process in the lens apparatus 100 described above. Will not be described.

As described above, according to the present embodiment, it is possible to provide a stereoscopic image pickup apparatus that can automatically acquire a correction value for synchronizing the operation of an iris between two lens apparatuses. Can do. Therefore, when the shooting environment changes, such as when the combination of lens devices used changes or when the posture difference changes, an appropriate correction value is applied each time to synchronize the zoom movements of the two lens devices. Is possible.
Further, the reference control value and the reference luminance value stored in the table of FIG. 15 may be arbitrarily changed by the user.

  In the present embodiment, the correction values are automatically acquired in the lens apparatuses 100 and 200. However, since the reference value for acquiring the correction values is stored in the reference value storage unit, the lens apparatus. Even if there is only one, the correction value can be automatically acquired. Further, even if the stereoscopic image pickup apparatus is configured together with the lens apparatus that has automatically acquired the correction value according to the present embodiment at another time, the operations of the irises of the two lens apparatuses can be synchronized.

Hereinafter, a stereoscopic video imaging apparatus according to a fifth embodiment of the present invention will be described with reference to FIGS.
FIG. 19 is a block diagram illustrating a configuration at the time of obtaining a correction value of the imaging apparatus according to the embodiment of the present invention.
In this figure, the stereoscopic image pickup apparatus is composed of a pair of lens devices 100 and 200, a pair of camera devices 150 and 250, a correction value acquisition processing unit 300, a chart 500, and an optical system 600 with a collimation function. . The correction value acquisition processing unit 300 is, for example, a PC.
Here, the description of the same reference numerals as in FIG. 1 described in the first to fourth embodiments will be omitted.

The lens apparatus 100 of FIG. 19 includes a focus mechanism including a focus lens group 101 that is a drive optical system that can be driven, a focus motor 102, a focus driver 103, and a focus position detection unit 104.
The focus lens group 101 is moved in the optical axis direction by a focus motor 102 driven by a focus driver 103. The position of the focus lens group 101 is detected by the focus position detection unit 104. Based on the command value obtained via the communication unit 130, the control unit 121 outputs a command value for driving the focus lens group 101 to a drive control unit 122 as drive control means described later. The drive control unit 122 moves the focus lens group 101 to a target position in the optical axis direction via the focus driver 103 and the focus motor 102.

Here, the camera device 150 includes an image sensor 151 and an image processing unit 152. The image sensor 151 receives a light beam that has passed through an optical system including the focus lens group 101, photoelectrically converts it, and outputs the result.
Since the lens device 200 and the camera device 250 have the same configuration as the lens device 100 and the camera device 150 as in the first to fourth embodiments, description thereof will be omitted.
In the present embodiment, the lens apparatus to which the correction is applied is the lens apparatus 100, 200, and the reference of the optical condition for acquiring the correction value is stored in a memory (not shown) included in the correction value acquisition processing unit 300. The stored reference value is used.

  The CPU 302 sends the drive command value to the control unit 121, via the communication units 303, 130, and 230, based on the control value that is stored in a reference value storage unit (not shown) and becomes the focus position for acquiring the correction value. 221 is output. In the reference value storage unit, for example, the table of FIG. 20 is stored.

  The table in FIG. 20 stores a control value (drive command) CFi (i: 1 to 5) that is a focus position for acquiring a correction value, and an object distance D_si at the control value CFi. This represents a criterion that when the focus lens group 101 is located at the target position corresponding to the control value CFi, the subject located at the object distance D_si should be focused.

  Further, the CPU 302 extracts a high-frequency component of the image signal from the image obtained from the image input unit 301 and uses it as a focus determination as a focus state detection device (focus state detection means) that detects the focus state. An evaluation value is calculated. Using this evaluation value, a drive command for the focus lens groups 101 and 201 is output to the lens apparatuses 100 and 200 according to the known principle of image AF.

A chart 500 is a subject that is imaged by the stereoscopic image capturing apparatus when the correction value is automatically acquired. The chart 500 in this embodiment is preferably a chart that can easily extract a high-frequency component of an image signal. For example, a Siemens star chart shown in FIG. 23 is used.
The optical system 600 with a collimation function is connected to the chart 500. The optical system 600 with a collimation function has a CPU (not shown), and at least one of the optical system of the optical system 600 with the collimation function 600 and the chart 500 is lighted based on a drive command from the correction value acquisition processing unit 300. Drive in the axial direction. Thereby, an optical object distance between the lens apparatuses 100 and 200 and the chart 500 is set.

Next, a series of correction value automatic acquisition processing of the stereoscopic image pickup apparatus in the present embodiment will be described with reference to the flowcharts of FIGS.
The correction value acquisition processing unit 300 controls these processes according to a computer program stored in a memory (not shown).
First, in step S1500 of FIG. 21, the CPU 302 performs a correction value acquisition process in the lens device 100, proceeds to step S2500, and executes a correction value acquisition process in the lens device 200.

Here, the correction value acquisition processing in the lens apparatus 100 in step S1500 will be described with reference to the flowchart of FIG.
In step S <b> 510, the CPU 302 (acquisition means) sets the object distance D_s <b> 1 corresponding to index 1 in the table of FIG. 20 stored in the reference value storage unit to the optical system 600 with a collimation function via the communication unit 303. Output. The optical system with collimation function 600 drives at least one of the optical system of the optical system with collimation function 600 and the chart 500 in the optical axis direction so that the optical object distance between the lens apparatus 100 and the chart 500 becomes D_s1. Let

  In step S520, after the optical object distance between the lens apparatus 100 and the chart 500 becomes D_s1 in step S510, the CPU 302 focuses the lens apparatus 100 on the chart 500 based on the principle of image AF. That is, a drive command for the focus lens group 101 is output so that the chart 500 is in focus (for example, the high frequency component of the contrast of the captured image of the chart 500 is maximized). A control value (correction drive command) for the lens device 100 when the lens device 100 is in focus with respect to the chart 500 is CntF1.

  In step S530, the CPU 302 (acquisition means) compares the difference between the control value CF1 and the control value CntF1 for the lens apparatus 100 when the lens apparatus 100 in step S520 is in focus with respect to the chart 500 (CF1− CntF1) is acquired as a correction value, and is output to the control unit 121 via the communication units 303 and 130. The control unit 121 stores the correction value and the control value CF1 in the correction value storage unit 123.

In step S540, the CPU 302 advances the index of the reference value stored in the reference value storage unit by one, and proceeds to step S550.
In step S550, it is determined whether or not the index is larger than a predetermined number (in the present embodiment, the predetermined number is 5). If the predetermined number is not exceeded, the process returns to step S510, the same processing as described above is performed, and the correction value in the control value corresponding to the index is acquired.
If the predetermined number is exceeded in step S550, it is determined that correction values have been acquired for all reference control values, and the correction value acquisition processing in the lens apparatus 100 is terminated.

  Subsequently, the CPU 302 proceeds to step S2500 of FIG. 21 to execute the correction value acquisition process in the lens device 200 and finish the correction value acquisition process. However, the same procedure as the correction value acquisition process in the lens apparatus 100 described above is performed. Will not be described.

As described above, according to the present embodiment, it is possible to provide a stereoscopic image pickup apparatus that can automatically acquire a correction value for synchronizing the focusing operation between two lens apparatuses. Can do. Therefore, when the shooting environment changes, such as when the combination of lens devices used changes or when the posture difference changes, an appropriate correction value is applied each time to synchronize the focus operations of the two lens devices. Is possible.
Further, the reference control value and the reference object distance stored in the table of FIG. 20 may be arbitrarily changed by the user.

  In the present embodiment, the correction values are automatically acquired in the lens apparatuses 100 and 200. However, since the reference value for acquiring the correction values is stored in the reference value storage unit, the lens apparatus. Even if there is only one, the correction value can be automatically acquired. Further, even if the stereoscopic image pickup apparatus is configured together with the lens apparatus that has automatically acquired the correction value according to the present embodiment at another time, it is possible to synchronize the focusing operations of the two lens apparatuses.

In this embodiment, the correction value acquisition processing unit 300 brings the lens apparatuses 100 and 200 into focus with respect to the chart 500, but the present invention is not limited to this.
For example, when the AF function is mounted on the lens device, the correction value acquisition processing unit 300 may acquire the correction value using the AF function of the lens device.

In this embodiment, the lens apparatus 100 or 200 is brought into focus with respect to the chart 500 by using the image AF. However, the present invention is not limited to this.
For example, a so-called external measurement AF may be used in which a distance measuring sensor is provided in the lens device, the focus position of the focus lens is calculated from the obtained subject distance, and the focus lens is controlled to be in focus.
Further, for example, so-called phase difference AF may be used in which a light beam that has passed through a lens device is branched by a branching optical system, a focused state with respect to a subject is detected from the branched light beam, and focus adjustment is performed based on the result. good.

As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.
For example, by combining the contents described in the first to fifth embodiments, correction values for synchronizing zoom, iris, and focus operations can be automatically acquired simultaneously or sequentially.

100, 200 Lens device 101, 201 Focus lens group (drive optical system)
105, 205 Zoom lens group (drive optical system)
109, 209 Iris diaphragm (drive optical system)
122, 222 Drive control unit (drive control means)
123, 223 Correction value storage unit (correction value storage means)
150, 250 Camera device 300 Correction value acquisition processing unit 302 CPU (acquisition means)

Claims (7)

A lens device including a drive optical system that can be driven; and a drive control unit that controls driving of the drive optical system based on a drive command; and a camera device that captures a subject image formed by the lens device. A stereoscopic video imaging device including two imaging devices,
In at least one of the two imaging devices, a drive command that is a position command corresponding to a predetermined reference position of the drive optical system and an evaluation value obtained from the captured image correspond to the predetermined reference position An acquisition means for acquiring a difference from a correction drive command issued to the drive control means for driving the drive optical system to a position that coincides with a reference value;
The at least one imaging device includes a storage unit that stores a difference between the drive command acquired by the acquisition unit and the correction drive command as a correction value.
A stereoscopic video imaging apparatus characterized by the above. The acquisition means outputs the drive command to the drive control means of the two image pickup devices, and obtains from an image picked up by one of the image pickup devices in a state of the drive optical system driven based on the drive command. The evaluation value to be obtained matches the evaluation value obtained from the image captured by the other imaging device in the state of the drive optical system driven based on the drive command as the reference value. Outputting the correction drive command to the drive control means of the imaging device to drive the drive optical system, and obtain a difference between the drive command and the correction drive command;
The three-dimensional image pickup device according to claim 1. Reference value storage means for storing a reference value corresponding to the drive command,
The acquisition unit outputs a drive command corresponding to the reference value stored in the reference value storage unit to the drive control unit of the two imaging devices to drive the drive optical system, and Correction that is a position command for the reference position to the drive control means so that an evaluation value obtained from an image captured in the state of the drive optical system driven based on the reference value corresponds to the reference value corresponding to the drive command Outputting a drive command to drive the drive optical system to obtain a difference between the drive command and the correction drive command;
The three-dimensional image pickup device according to claim 1.   The stereoscopic video imaging apparatus according to claim 2, wherein the drive optical system is a zoom lens, and the reference value and the evaluation value are field angles.   The stereoscopic video imaging apparatus according to claim 2, wherein the driving optical system is a zoom lens, and the reference value and the evaluation value are a size of a subject in the image.   The stereoscopic video imaging apparatus according to claim 2, wherein the driving optical system is an iris mechanism, and the reference value and the evaluation value are luminances. A lens device including a focus lens, a drive control unit that controls driving of the focus lens based on the drive command, and a correction value storage unit that stores a correction value of the drive command output to the drive control unit; A stereoscopic video imaging device comprising two imaging devices each having a camera device for imaging a subject image formed by
A focus state detection means for detecting a focus state based on a subject image formed by at least one of the two image pickup devices;
Reference value storage means for storing an object distance as a reference value corresponding to the drive command;
After driving the focus lens by outputting a drive command corresponding to the reference value stored in the reference value storage means to the drive control means of the two imaging devices, the imaging state is detected by the focus state detection means. A correction drive command is output to the drive control means to drive the focus lens of the imaging device so that a subject image obtained by imaging a subject at an object distance corresponding to the drive command is focused by the device. Obtaining means for obtaining a difference between the drive command and the correction drive command;
With
The correction value storage means stores a difference between the drive command and the correction drive command as a correction value for the drive command output to the drive control means.
A stereoscopic video imaging apparatus characterized by the above.

Images