CN209861061U - Device for measuring wide-range horizontal field angle of camera - Google Patents
Device for measuring wide-range horizontal field angle of camera Download PDFInfo
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- CN209861061U CN209861061U CN201920894061.5U CN201920894061U CN209861061U CN 209861061 U CN209861061 U CN 209861061U CN 201920894061 U CN201920894061 U CN 201920894061U CN 209861061 U CN209861061 U CN 209861061U
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Abstract
The utility model relates to a device for measuring wide-range horizontal field angle of a camera, which comprises a camera supporting mobile station, a control computer (7) and an imaging target test board (1), wherein the control computer (7) is connected with the camera supporting mobile station; a camera (6) to be tested is placed on the camera supporting mobile station and images the imaging target test board (1); the moving direction of the camera supporting the moving platform is vertical to the plane of the imaging target test board (1). Adopted the utility model discloses a device for measuring camera wide range horizontal field angle adopts the camera to survey test panel scale figure to form images, and easy operation is convenient, and repeatability is good, has reduced test time, improves efficiency of software testing, is applicable to the field angle test of ordinary scope camera, is applicable to simultaneously and carries out the field of view to the camera of super large range field angle and mark, for example wide angle camera or fisheye camera etc..
Description
Technical Field
The utility model relates to a photoelectric test field especially relates to camera horizontal field of vision field measurement, specifically indicates a device for measuring camera wide range horizontal field of vision.
Background
The optical system is an important component of the imaging camera, and the field angle of the camera is an important index of the optical system of the camera, and represents the imaging angle range of the camera.
At present, in the existing camera field angle measuring technology, a star point hole which is formed by placing a camera on a focusing surface at a turntable and a collimator can be used for imaging, so that the horizontal field angle of the camera can be obtained.
The method is equivalent to the following formula:
in the existing field angle test method, the distance L of the camera moving along the optical axis can also be used1-L2And width difference W of corresponding field of view1-W2Obtaining the field angle of the camera:
in addition, the field angle of the camera can be calculated by fixing the position of the object to be calibrated, rotating the camera by a certain angle, comparing the position difference of the calibration images obtained before and after rotation, and calculating the field angle of the camera.
The methods are suitable for measuring the field angle (generally less than 90 degrees) of a common camera, and for cameras with an ultra-large range of field angles (such as wide-angle cameras or fisheye cameras), the field angle measurement value cannot be obtained efficiently and accurately due to the limitation of the field size in a common laboratory environment.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the shortcoming of above-mentioned prior art, providing one kind and satisfying the measurement accuracy, easy and simple to handle, application scope comparatively extensive be used for measuring the device of camera wide region horizontal field angle.
In order to achieve the above object, the present invention provides an apparatus for measuring a wide-range horizontal field angle of a camera, comprising:
the device for measuring the wide-range horizontal field angle of the camera is mainly characterized by comprising a camera supporting mobile station, a control computer and an imaging target test board, wherein the control computer is connected with the camera supporting mobile station; the camera to be tested is placed on the camera supporting mobile station and images the imaging target test board; the moving direction of the camera supporting the moving platform is vertical to the plane of the imaging target test board.
Preferably, the camera supporting mobile station comprises an electric translation table, a three-dimensional adjusting frame and a camera supporting frame, wherein the three-dimensional adjusting frame is fixed on the camera supporting frame and bears a camera to be detected; and the electric translation table and the camera to be tested are respectively connected with the control computer.
Preferably, the target test board has a scale pattern which is symmetrical left and right with the origin as the center, and the camera to be tested images the scale pattern.
Adopted the utility model discloses a device for measuring camera wide range horizontal field angle adopts the camera to survey test panel scale figure to form images, and easy operation is convenient, and repeatability is good, has reduced test time, improves efficiency of software testing, is applicable to the field angle test of ordinary scope camera, is applicable to simultaneously and carries out the field of view to the camera of super large range field angle and mark, for example wide angle camera or fisheye camera etc..
Drawings
Fig. 1 is a view showing a structure of a general view field of the device for measuring a wide-range horizontal field angle of a camera according to the present invention.
Fig. 2 is a view of the device structure of the ultra-large range view field of the device for measuring the wide range horizontal field angle of the camera of the present invention.
Reference numerals:
1 target test board
2 graduated graph
3 camera support frame
4 three-dimensional adjusting rack
5 electric translation table
6 video camera to be tested
7 control computer
Detailed Description
In order to more clearly describe the technical content of the present invention, the following further description is given with reference to specific embodiments.
The device for measuring wide-range horizontal field angle of the camera of the utility model comprises a camera supporting mobile station, a control computer 7 and an imaging target test board 1, wherein the control computer 7 is connected with the camera supporting mobile station; the camera 6 to be tested is placed on the camera supporting mobile station and images the imaging target test board 1; the moving direction of the camera supporting the moving platform is vertical to the plane of the imaging target test board 1.
As a preferred embodiment of the present invention, the camera supporting mobile station includes an electric translation stage 5, a three-dimensional adjusting frame 4 and a camera supporting frame 3, wherein the three-dimensional adjusting frame 4 is fixed on the camera supporting frame 3 and carries a camera 6 to be measured; the electric translation stage 5 and the camera 6 to be tested are respectively connected with the control computer 7.
As the utility model discloses a preferred embodiment, the target test panel 1 that forms images have the scale figure 2 of using the original point as central bilateral symmetry, the camera 6 that awaits measuring right scale figure 2 form images.
The utility model discloses an among the specific embodiment, the utility model provides a novel wide range horizontal field angle measuring device for can be more swiftly convenient to the demarcation of the ordinary visual field of camera and super large range visual field under the laboratory environment.
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments. The utility model provides a novel wide range horizontal visual field angle measurement's device. As shown in fig. 1 and 2, includes a camera-supported mobile station, an imaging target test board 1, and a control computer 7.
The control computer 7 is connected to the camera support mobile station for controlling the movement of the support mobile station.
The imaging target test board 1 is provided with a scale, and finally the view field angle of the camera 6 to be tested is obtained by reading the scale value on the imaging target test board 1. The device can quickly and accurately measure the horizontal field angle of the camera and is suitable for field angle calibration of the wide-range field-of-view camera. Meanwhile, 180-degree testing can be completed, and the method is suitable for cameras with wide field of view.
The camera 6 to be tested is placed on the camera support mobile and images the target test board 1. The camera supporting moving platform comprises an electric translation platform 5, a three-dimensional adjusting frame 4 and a camera supporting frame 3; the three-dimensional adjusting frame 4 is fixed on the camera supporting frame 3 and simultaneously bears a camera 6 to be detected, and the electric translation table 5 and the camera 6 to be detected are respectively connected with the control computer 7. The moving direction of the supporting moving table is perpendicular to the plane of the imaging target test board 1.
The imaging target comprises an imaging target test board 1 and a scale pattern 2 arranged in the center of the imaging target test board 1; the camera 6 to be tested images the scale pattern 2 at the center of the target test board 1.
Attaching a scale pattern 2 which is symmetrical left and right by taking an original point as a center on the imaging target test plate 1, and adjusting the initial position of a camera 6 to be tested to ensure that the center of the camera is aligned with the center of the scale pattern 2 of the target test plate 1; recording the position a of the camera at the moment and the width D2 between the view field boundary of the camera at the position a and the center of the scale graph 2;
attaching a scale pattern 2 which is symmetrical left and right by taking an original point as a center on the imaging target test plate 1, and adjusting the initial position of a camera 6 to be tested to ensure that the center of the camera is aligned with the center of the scale pattern 2 of the target test plate 1; controlling the movement of the supporting mobile station through the control computer 7, and respectively recording the widths D2 and D1 of the view field boundary of the camera at the positions a and b and the center of the scale graph 2 and the distance delta L between the positions a and b;
moving the position of the camera 6 to be measured to b, and aligning the center of the scale graph 2 with the center position of the image shot by the camera 6 to be measured; recording the width D1 between the field of view boundary of the camera and the center of the scale graph 2 and the distance delta L between the positions a and b when the camera 6 to be measured is at the position b; the running direction of the camera 6 to be tested is vertical to the plane of the target test board 1;
the field angle of the camera 6 to be measured can be calculated according to the following formula:
the target test board 1 and the scale pattern 2 thereof are respectively provided with an extension section at two ends thereof in a direction vertical to the plane, when the view field angle of the camera 6 to be tested is very large, the width D3 of the view field boundary at the scale extension section is recorded when the camera 6 to be tested is at the position a, the position of the camera 6 to be tested is moved to the position b, the width D1 of the view field boundary of the camera and the center of the scale pattern 2 at the moment is recorded, meanwhile, the width D0 of the center of the scale pattern 2 and the boundary of the scale is recorded, and the view field angle can be calculated by the following:
the device for measuring the wide-range horizontal field angle of the camera is adopted, the camera is adopted to image the scale pattern of the target test board, the operation is simple and convenient, the repeatability is good, the test time is reduced, the test efficiency is improved, the device is suitable for the field angle test of the common-range camera, and is also suitable for field calibration of the camera with the ultra-large range field angle, such as a wide-angle camera or a fisheye camera.
In this specification, the invention has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.
Claims (3)
1. An apparatus for measuring wide-range horizontal field angle of a camera, characterized in that the apparatus comprises a camera supporting mobile station, a control computer (7) and an imaging target test board (1), wherein the control computer (7) is connected with the camera supporting mobile station; a camera (6) to be tested is placed on the camera supporting mobile station and images the imaging target test board (1); the moving direction of the camera supporting the moving platform is vertical to the plane of the imaging target test board (1).
2. The device for measuring the wide-range horizontal field angle of the camera according to claim 1, wherein the camera supporting moving table comprises an electric translation table (5), a three-dimensional adjusting frame (4) and a camera supporting frame (3), the three-dimensional adjusting frame (4) is fixed on the camera supporting frame (3) and carries the camera (6) to be measured; the electric translation table (5) and the camera (6) to be tested are respectively connected with the control computer (7).
3. The apparatus for measuring a wide-range horizontal field angle of a video camera according to claim 1, wherein the target test board (1) has a scale pattern (2) which is symmetrical left and right about an origin, and the video camera (6) to be measured images the scale pattern (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920894061.5U CN209861061U (en) | 2019-06-14 | 2019-06-14 | Device for measuring wide-range horizontal field angle of camera |
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| CN201920894061.5U CN209861061U (en) | 2019-06-14 | 2019-06-14 | Device for measuring wide-range horizontal field angle of camera |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114166472A (en) * | 2021-10-19 | 2022-03-11 | 浙江大华技术股份有限公司 | Method and device for measuring field angle of lens |
| CN116519274A (en) * | 2023-06-25 | 2023-08-01 | 之江实验室 | Lens field angle testing method and testing system |
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2019
- 2019-06-14 CN CN201920894061.5U patent/CN209861061U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114166472A (en) * | 2021-10-19 | 2022-03-11 | 浙江大华技术股份有限公司 | Method and device for measuring field angle of lens |
| CN116519274A (en) * | 2023-06-25 | 2023-08-01 | 之江实验室 | Lens field angle testing method and testing system |
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