CN104427231A - Fixture for calibrating camera, and calibration method - Google Patents
Fixture for calibrating camera, and calibration method Download PDFInfo
- Publication number
- CN104427231A CN104427231A CN201310381924.6A CN201310381924A CN104427231A CN 104427231 A CN104427231 A CN 104427231A CN 201310381924 A CN201310381924 A CN 201310381924A CN 104427231 A CN104427231 A CN 104427231A
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- camera
- installing hole
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Abstract
The invention discloses a fixture for calibrating a camera, and a calibration method for calibrating the camera by use of the fixture. The camera comprises a base; a lens movably arranged on the base in a vertical direction; and a printed circuit board which is movably arranged on the base in a horizontal direction. The fixture comprises a body, the body is provided with a cross stamp and a fixing cavity which is used for fixing one from the base, the lens and the printed circuit board in a horizontal direction, and the center of the fixing cavity is opposite to the center of the cross stamp in a vertical direction. According to the embodiments of the invention, by using the fixture for calibrating the camera, the optical center of the camera can be conveniently, rapidly and accurately aligned.
Description
Technical field
The present invention relates to a kind of tool for calibrating camera and calibration steps.
Background technology
There is the out-of-alignment defect of optical centre in the existing camera for vehicle (vehicle-mounted camera), causes that the optical homogeneity of camera is poor, imaging effect is poor.At present, the optical centre that the optical axis deviation of camera lens and/or the assembling process of management and control camera by controlling camera reduce camera is as far as possible inconsistent.But, the problem that this optical centre not eliminating camera departs from, and greatly can increase the manufacturing cost of camera.
Summary of the invention
The present invention is intended at least to solve one of technical problem existed in prior art.For this reason, one object of the present invention is to propose a kind of tool for calibrating camera.
Another object of the present invention is to propose a kind of calibration steps utilizing described tool to calibrate described camera.
To achieve these goals, embodiment according to a first aspect of the present invention proposes a kind of tool for calibrating camera, and described camera comprises: base; Camera lens, described camera lens in the vertical direction is located on described base movably; And printed circuit board (PCB), described printed circuit board (PCB) is located on described base in the horizontal direction movably; Described tool comprises body, described body is provided with cross marking and for fixing the lock chamber of in described base, described camera lens and described printed circuit board (PCB) in the horizontal direction, the center of described lock chamber is relative with the center in the vertical direction that described cross marks.
Marking for the tool calibrating camera by arranging described cross and making the center of described lock chamber relative with the center in the vertical direction that described cross marks according to the embodiment of the present invention, thus can aim at the optical centre of described camera easily, rapidly, accurately.Described camera is by be located at described camera lens in the vertical direction movably on described base and to be located at movably in the horizontal direction on described base by described printed circuit board (PCB), thus not only easily, accurately can complete the focusing of described camera lens, and easily, accurately can complete the aligning of the optical centre of described camera.
In addition, following additional technical characteristic can also be had according to the embodiment of the present invention for the tool calibrating camera:
According to one embodiment of present invention, have container cavity in described base, described container cavity is through described base vertically, wherein said camera lens be located in described container cavity at least partially, described printed circuit board (PCB) is relative with described container cavity.The structure of described camera can be made thus more reasonable.
According to one embodiment of present invention, the wall of described container cavity is provided with internal thread, and the side face of described camera lens is provided with external screw thread, described external screw thread and described screw-internal thread fit.Described camera lens not only can be realized thus rotatably to be located on described base, and described camera lens is more firmly located on described base.
According to one embodiment of present invention, described base is provided with the first installing hole, described printed circuit board (PCB) is provided with the second installing hole, described camera also comprises securing member and described securing member comprises anchorage bar and is located at fastener head on described anchorage bar, wherein said anchorage bar to be engaged in described first installing hole and described second installing hole and described fastener head against on the printed circuit board.
Described printed circuit board (PCB) can be moved thus more easily in the horizontal direction or described camera lens and described base can be moved more easily in the horizontal direction, thus the optical centre of described camera can be aimed at more easily, namely can calibrate described camera more easily.
According to one embodiment of present invention, the aperture of the diameter of described anchorage bar and described first installing hole is adaptive and be less than the aperture of described second installing hole, and the diameter of described fastener head is greater than the aperture of described second installing hole.
Described printed circuit board (PCB) can be moved thus more easily in the horizontal direction or described camera lens and described base can be moved more easily in the horizontal direction, thus the optical centre of described camera can be aimed at more easily, namely can calibrate described camera more easily.
According to one embodiment of present invention, described first installing hole is multiple, and described second installing hole is multiple, and multiple described first installing hole is relative one by one with multiple described second installing hole.Described printed circuit board (PCB) can be fixedly mounted on described base more thus.
According to one embodiment of present invention, described securing member is multiple, and the anchorage bar of multiple described securing member is engaged in multiple described first installing hole and multiple described second installing hole respectively accordingly.Described printed circuit board (PCB) can be fixedly mounted on described base more thus.
According to one embodiment of present invention, described camera lens is rotatably located on described base.The focal length of described camera lens can be regulated thus by rotating described camera lens or described base, thus more easily, accurately can regulate the focal length of described camera lens.
According to one embodiment of present invention, described body comprises: the first level board, and described first level board is provided with described lock chamber, and described lock chamber is through described first level board vertically; Second level board, described second level board and described first level board in the vertical direction spaced apart, the marking of described cross is located on the surface relative with described first level board of described second level board; And connector, described connector is connected with each in described second level board with described first level board.Described tool has the advantages such as simple and reasonable for structure thus.
Propose a kind of calibration steps utilizing the tool calibration camera for calibrating camera described according to a first aspect of the present invention according to a second aspect of the invention, described calibration steps comprises the following steps: focus to described camera lens; Described camera is arranged on described tool, and adjust the imaging direction of described camera, described camera lens is to described cross marking imaging, and one in wherein said base, described camera lens and described printed circuit board (PCB) is fixed in described lock chamber in the horizontal direction; Regulate in described base and described camera lens or described printed circuit board (PCB) in the horizontal direction, until the cross marking in image formed by described camera lens overlaps with the cross hairs as reference.
Utilization according to the embodiment of the present invention can be aimed at the optical centre of described camera easily, rapidly, accurately for the calibration steps of the tool calibration camera calibrating camera, can ensure the unanimously optical of described camera when described camera batch production.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the explosive view of the camera according to the embodiment of the present invention;
Fig. 2 is the cutaway view of the camera according to the embodiment of the present invention;
Fig. 3 is the partial structurtes schematic diagram of the tool according to the embodiment of the present invention;
Fig. 4 is the explosive view of camera according to the embodiment of the present invention and tool;
Fig. 5 is the cutaway view of camera according to the embodiment of the present invention and tool;
Fig. 6 utilizes tool calibration according to the flow chart of the calibration steps of the camera of the embodiment of the present invention.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, except as otherwise noted, the implication of " multiple " is two or more.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
Below with reference to Fig. 1-Fig. 5, the tool 20 for calibrating camera 10 according to the embodiment of the present invention is described.As Figure 1-Figure 5, camera 10 comprises base 100, camera lens 200 and printed circuit board (PCB) 300.Camera lens 200 in the vertical direction is located on base 100 movably, and printed circuit board (PCB) 300 is located on base 100 in the horizontal direction movably.
Tool 20 according to the embodiment of the present invention comprises body 201, body 201 is provided with cross marking 2012 and for the lock chamber 2011 of in firm banking 100, camera lens 200 and printed circuit board (PCB) 300 in the horizontal direction, center and the cross of lock chamber 2011 mark 2012 center in the vertical direction relative.Wherein, vertical direction is as shown in the arrow A in Fig. 1-Fig. 5, and horizontal direction is orthogonal with vertical direction.
Describe the calibration steps utilizing and calibrate camera 10 according to the tool 20 of the embodiment of the present invention below with reference to Fig. 6, described calibration steps comprises the following steps:
Camera lens 200 is focused.
Be arranged on tool 20 by camera 10, and adjust the imaging direction of camera 10, camera lens 200 pairs of crosses mark 2012 imagings.Wherein, one in base 100, camera lens 200 and printed circuit board (PCB) 300 is fixed in lock chamber 2011 in the horizontal direction, and one namely in base 100, camera lens 200 and printed circuit board (PCB) 300 can not be moved in the horizontal direction.
One or printed circuit board (PCB) 300 in the horizontal direction in adjusting base 100 and camera lens 200, until the cross marking 2012 in image formed by camera lens 200 overlaps with the cross hairs as reference.In other words, when printed circuit board (PCB) 300 is fixed in lock chamber 2011 in the horizontal direction, adjusting base 100 or camera lens 200 in the horizontal direction.When base 100 is fixed in lock chamber 2011 in the horizontal direction, regulate printed circuit board (PCB) 300 in the horizontal direction.When camera lens 200 is fixed in lock chamber 2011 in the horizontal direction, regulate printed circuit board (PCB) 300 in the horizontal direction.
Specifically, be arranged on tool 20 by mixing up burnt camera 10, camera lens 200 and cross mark 2012 relative.After camera 10 energising work, open corresponding testing software.Now, there is video window in display, there is in this video window grid and cross hairs.The imaging direction of adjustment camera 10, so that the cross marking 2012 in image formed by camera lens 200 keeps level with the cross hairs in video window.One in the horizontal direction in adjusting base 100 and camera lens 200 or the position of printed circuit board (PCB) 300, until the cross marking 2012 in image formed by camera lens 200 overlaps with the cross hairs as reference in video window, thus the optical centre completing camera 10 is aimed at, and namely completes the calibration to camera 10.That is, the optical centre of camera 10 aims at mainly by changing the chip 320(sensor be arranged on printed circuit board (PCB) 300) and the relative position realization of camera lens 200, the optical centre only making the optical axis of camera lens 200 and the optical centre of chip 320 could realize camera 10 is point-blank aimed at.
According to the embodiment of the present invention for the tool 20 of calibrating camera 10 by cross marking 2012 is set and make the center of lock chamber 2011 and cross mark 2012 center in the vertical direction relative, thus can to aim at the optical centre of camera 10 easily, rapidly, accurately.Camera 10 is by be located at camera lens 200 in the vertical direction movably on base 100 and to be located at movably in the horizontal direction on base 100 by printed circuit board (PCB) 300, thus not only easily, accurately can complete the focusing of camera lens 200, and easily, accurately can complete the aligning of the optical centre of camera 10.
The calibration steps utilizing tool 20 to calibrate camera 10 according to the embodiment of the present invention can be aimed at the optical centre of camera 10 easily, rapidly, accurately, can ensure the unanimously optical of camera 10 when camera 10 is produced in batches.
Particularly, can be focused to camera lens 200 by the distance between in the vertical direction adjusting base 100 and camera lens 200.Printed circuit board (PCB) 300 can comprise the chip 320 for photosensitive imaging.
In a concrete example of the present invention, utilizing tool 20 to calibrate camera 10 can have been come by computer.The video image that camera 10 collects is converted to video signal by chip 320, and then by the image pick-up card be connected with camera, the analog of video source is transformed into digital signal, and these information are stored on the hard disk of computer, whole analog-to-digital conversion is completed by image pick-up card.
Usual image pick-up card has interior card insertion and external boxlike two kinds.Interior card insertion image pick-up card directly inserts in the expansion slot in the mainboard of computer, be connected with system for computer bus, during this kind of image pick-up card work, only the camera video output of the camera 10 of energising work need be connected by video line with image pick-up card, just can open software on computer computer and see video image.The image pick-up card of external boxlike and the connection of computer computer are then realized by USB port, and the image pick-up card of external boxlike is also connected by video line with the video output terminals of camera 10.
As shown in Figure 1, Figure 2, shown in Fig. 4 and Fig. 5, in some embodiments of the invention, can have container cavity 110 in base 100, container cavity 110 can vertically through base 100.Wherein, camera lens 200 can be located in container cavity 110 at least partially, printed circuit board (PCB) 300 can be relative with container cavity 110.The structure of camera 10 can be made thus more reasonable.
Specifically, the top and bottom of container cavity 110 can be opened wide.
Advantageously, camera lens 200 can rotatably be located on base 100.The focal length of adjustable lens 200 can be carried out thus by rotating lens 200 or base 100, thus can more easily, the focal length of accurately adjustable lens 200.
The wall of container cavity 110 can be provided with internal thread, the side face of camera lens 200 can be provided with external screw thread, described external screw thread can with described screw-internal thread fit.Camera lens 200 not only can be realized thus rotatably to be located on base 100, and camera lens 200 more firmly can be located on base 100.
As shown in Figure 1, Figure 2, shown in Fig. 4 and Fig. 5, in examples more of the present invention, base 100 can be provided with the first installing hole 120, printed circuit board (PCB) 300 can be provided with the second installing hole 310.Camera 10 can also comprise securing member 400, and the fastener head 420 that securing member 400 can comprise anchorage bar 410 and be located on anchorage bar 410.Wherein, anchorage bar 410 can be engaged in the first installing hole 120 and the second installing hole 310, and fastener head 420 can be resisted against on printed circuit board (PCB) 300, the diameter of anchorage bar 410 can be adaptive with the aperture of the first installing hole 120, and the diameter of anchorage bar 410 can be less than the aperture of the second installing hole 310, the diameter of fastener head 420 can be greater than the aperture of the second installing hole 310.
In other words, printed circuit board (PCB) 300 can be clamped between fastener head 420 and base 100.Printed circuit board (PCB) 300 or can moving lens 200 and base 100 in the horizontal direction more easily can be moved thus more easily in the horizontal direction, thus the optical centre of camera 10 can be aimed at more easily, namely can calibrate camera 10 more easily.
Specifically, when calibrating camera 10, securing member 400 of can outwarding winding, so that fastener head 420 can depart from printed circuit board (PCB) 300.Printed circuit board (PCB) 300 or movable base 100 and camera lens 200 in the horizontal direction can be moved thus in the horizontal direction.After aiming at the optical centre of camera 10, securing member 400 can be screwed, so that printed circuit board (PCB) 300 and base 100 relative movement can not occur.
Advantageously, securing member 400 can be bolt or screw.
As shown in Figure 1, Figure 2, shown in Fig. 4 and Fig. 5, in an example of the present invention, the first installing hole 120 can be multiple, and the second installing hole 310 can be multiple, and securing member 400 can be multiple.Wherein, multiple first installing hole 120 can be relative one by one with multiple second installing hole 310, and the anchorage bar 410 of multiple securing member 400 can be engaged in multiple first installing hole 120 and multiple second installing hole 310 respectively accordingly.
That is, the quantity of the quantity of the first installing hole 120, the quantity of the second installing hole 310 and securing member 400 can be equal, and a securing member 400 can be engaged in first installing hole 120 and second installing hole 310.Printed circuit board (PCB) 300 can be fixedly mounted on base 100 more thus.
As Figure 1-Figure 5, in a concrete example of the present invention, the body 201 of tool 20 can comprise the first level board 2013, second level board 2014 and connector 2015.First level board 2013 can be provided with lock chamber 2011, and lock chamber 2011 can vertically through first level board 2013.Second level board 2014 and the first level board 2013 in the vertical direction can be spaced apart, and cross marking 2012 can be located on the surface relative with the first level board 2013 of the second level board 2014.Connector 2015 is connected with each in the second level board 2014 with the first level board 2013.Tool 20 has the advantages such as simple and reasonable for structure thus.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (10)
1. for calibrating a tool for camera, it is characterized in that, described camera comprises:
Base;
Camera lens, described camera lens in the vertical direction is located on described base movably; With
Printed circuit board (PCB), described printed circuit board (PCB) is located on described base in the horizontal direction movably;
Described tool comprises body, described body is provided with cross marking and for fixing the lock chamber of in described base, described camera lens and described printed circuit board (PCB) in the horizontal direction, the center of described lock chamber is relative with the center in the vertical direction that described cross marks.
2. the tool for calibrating camera according to claim 1, it is characterized in that, in described base, there is container cavity, described container cavity is through described base vertically, wherein said camera lens be located in described container cavity at least partially, described printed circuit board (PCB) is relative with described container cavity.
3. the tool for calibrating camera according to claim 2, is characterized in that, the wall of described container cavity is provided with internal thread, and the side face of described camera lens is provided with external screw thread, described external screw thread and described screw-internal thread fit.
4. the tool for calibrating camera according to claim 1, it is characterized in that, described base is provided with the first installing hole, described printed circuit board (PCB) is provided with the second installing hole, described camera also comprises securing member and described securing member comprises anchorage bar and is located at fastener head on described anchorage bar, wherein said anchorage bar to be engaged in described first installing hole and described second installing hole and described fastener head against on the printed circuit board.
5. the tool for calibrating camera according to claim 4, it is characterized in that, the aperture of the diameter of described anchorage bar and described first installing hole is adaptive and be less than the aperture of described second installing hole, and the diameter of described fastener head is greater than the aperture of described second installing hole.
6. the tool for calibrating camera according to claim 4, is characterized in that, described first installing hole is multiple, and described second installing hole is multiple, and multiple described first installing hole is relative one by one with multiple described second installing hole.
7. the tool for calibrating camera according to claim 6, is characterized in that, described securing member is multiple, and the anchorage bar of multiple described securing member is engaged in multiple described first installing hole and multiple described second installing hole respectively accordingly.
8. the tool for calibrating camera according to claim 1, is characterized in that, described camera lens is rotatably located on described base.
9. the tool for calibrating camera according to claim 1, is characterized in that, described body comprises:
First level board, described first level board is provided with described lock chamber, and described lock chamber is through described first level board vertically;
Second level board, described second level board and described first level board in the vertical direction spaced apart, the marking of described cross is located on the surface relative with described first level board of described second level board; With
Connector, described connector is connected with each in described second level board with described first level board.
10. utilizing a calibration steps for the tool calibration camera for calibrating camera according to any one of claim 1-9, it is characterized in that, comprise the following steps:
Described camera lens is focused;
Described camera is arranged on described tool, and adjust the imaging direction of described camera, described camera lens is to described cross marking imaging, and one in wherein said base, described camera lens and described printed circuit board (PCB) is fixed in described lock chamber in the horizontal direction; With
Regulate in described base and described camera lens or described printed circuit board (PCB) in the horizontal direction, until the cross marking in image formed by described camera lens overlaps with the cross hairs as reference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310381924.6A CN104427231B (en) | 2013-08-28 | 2013-08-28 | For calibrating the gauge and calibration method of camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310381924.6A CN104427231B (en) | 2013-08-28 | 2013-08-28 | For calibrating the gauge and calibration method of camera |
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| Publication Number | Publication Date |
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| CN104427231A true CN104427231A (en) | 2015-03-18 |
| CN104427231B CN104427231B (en) | 2018-05-08 |
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| CN201310381924.6A Active CN104427231B (en) | 2013-08-28 | 2013-08-28 | For calibrating the gauge and calibration method of camera |
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| CN106814533A (en) * | 2017-03-30 | 2017-06-09 | 广州优创电子有限公司 | Lens calibration device and camera lens calibration system |
| CN107295258A (en) * | 2017-07-20 | 2017-10-24 | 上海骋旭信息技术有限公司 | Adjust method, device and the terminal device of camera lens module |
| CN108040249A (en) * | 2017-11-24 | 2018-05-15 | 深圳市比亚迪电子部品件有限公司 | A kind of camera optical centre calibration jig |
| CN108436447A (en) * | 2018-05-25 | 2018-08-24 | 深圳市新良田科技股份有限公司 | Jig for calibrating high photographing instrument camera and method |
| CN109240027A (en) * | 2018-11-16 | 2019-01-18 | 上海吉七物联网科技有限公司 | A kind of convenient and fast ADAS angle lens adjustment structure |
| CN112577429A (en) * | 2020-12-11 | 2021-03-30 | 博炯(上海)精密机械科技有限公司 | Workpiece machining is with measuring imager calibrating device |
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| CN106814533A (en) * | 2017-03-30 | 2017-06-09 | 广州优创电子有限公司 | Lens calibration device and camera lens calibration system |
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| CN109240027A (en) * | 2018-11-16 | 2019-01-18 | 上海吉七物联网科技有限公司 | A kind of convenient and fast ADAS angle lens adjustment structure |
| CN112577429A (en) * | 2020-12-11 | 2021-03-30 | 博炯(上海)精密机械科技有限公司 | Workpiece machining is with measuring imager calibrating device |
| CN112577429B (en) * | 2020-12-11 | 2022-12-23 | 博炯(上海)精密机械科技有限公司 | Workpiece machining is with measuring imager calibrating device |
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| CN104427231B (en) | 2018-05-08 |
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