CN204154288U - Based on the camera calibration target of the automotive vision detection system of cylindrical coordinates - Google Patents
Based on the camera calibration target of the automotive vision detection system of cylindrical coordinates Download PDFInfo
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- CN204154288U CN204154288U CN201420438436.4U CN201420438436U CN204154288U CN 204154288 U CN204154288 U CN 204154288U CN 201420438436 U CN201420438436 U CN 201420438436U CN 204154288 U CN204154288 U CN 204154288U
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Abstract
The utility model discloses a kind of camera calibration target of the automotive vision detection system based on cylindrical coordinates, be intended to solve existing three-dimensional scaling thing directly can only obtain Descartes's three-dimensional cartesian coordinate system under three-dimensional data points, the problem of the data point determined by cylinder radius and angle under cannot obtaining cylindrical coordinate system, camera calibration target based on the automotive vision detection system of cylindrical coordinates forms primarily of base (1) and cylindrical coordinates face (2), provide a kind of structure simple, accuracy of detection is high, cumulative errors is little, function is complete, easy and simple to handle, be easy to install, highly versatile, cost is lower, the met automotive check industry of dependable performance carries out the camera calibration target of the automotive vision detection system based on cylindrical coordinates of vision-based detection requirement to car body.
Description
Technical field
The utility model relates to a kind of inspection machine of auto industry field, and in particular, it relates to a kind of camera calibration target of the automotive vision detection system based on cylindrical coordinates.
Background technology
For ensureing the safety traffic of automobile, rationally detect overload and oversize and the size repacking of automobile fast, the vision measurement carrying out every geometric angle of automobile is one of main test item of automobile detection field.At present, mainly rest on the measurement of manual meter ruler to the measurement of automobile dimension and angle, efficiency is low, low precision, and intensity of workers is large.Adopt machine vision metrology technology to carry out non-contact detecting to automobile geometric parameter to be expected to solve above technical bottleneck owing to having the features such as quick, accurate and high reliability.Because three-dimensional scaling thing can to determine the transition matrix of video camera phase areal coordinate and three dimensional space coordinate by a photos, therefore Fast Calibration can be realized; The stated accuracy of three-dimensional scaling thing is higher than two-dimensional calibrations thing simultaneously.But existing three-dimensional scaling object is long-pending comparatively large, processed complex, is difficult to realize practicality and requires higher on-site proving; Simultaneously existing three plane formulas demarcate targets directly can only obtain Descartes's three-dimensional cartesian coordinate system under three-dimensional data points, cannot obtain under cylindrical coordinate system by cylinder radius, height and angle determine data point, and for the vision measurement of coplanar geometric angle, calculate without conversion the angle information directly demarcated under cylindrical coordinate system significant for improving the isoparametric measuring accuracy of bus location angle such as toeing-in.The utility model adopts the structure in fan-shaped base and circular cylindrical coordinate face, achieve the demarcation of detection system video camera under cylindrical coordinate system, system architecture is simple, be convenient to processing and transport, directly can obtain the cylindrical coordinates of the data point of Spatial General 6 R position under cylindrical coordinate system, improve the accuracy of angular measurement, significant to the technical progress of auto industry detection field.
Summary of the invention
The utility model directly can only obtain the three-dimensional data points under Descartes's three-dimensional cartesian coordinate system for current existing three-dimensional scaling thing, cannot obtain under cylindrical coordinate system by cylinder radius and angle determine the problem of data point, provide a kind of cylindrical coordinates that directly can obtain the data point of Spatial General 6 R position under cylindrical coordinate system, structure is simple, accuracy of detection is high, cumulative errors is little, function is complete, easy and simple to handle, be easy to install, highly versatile, cost is lower, the met automotive check industry of dependable performance carries out the camera calibration target of the automotive vision detection system based on cylindrical coordinates of vision-based detection requirement to automobile angle parameter.
Consult Fig. 1 to Fig. 2, for solving the problems of the technologies described above, the utility model adopts following technical scheme to be achieved.The camera calibration target of the automotive vision detection system based on cylindrical coordinates provided by the utility model includes base and cylindrical coordinates face.
The curved edge of base upper surface is welded and fixed after placing with the arcuate lower surface in cylindrical coordinates face is concentric and is connected, and carries out bimestrial Ageing Treatment after welding.
Base described in technical scheme is 90 ° of fan-shaped Steel Thin-Wall workpieces and modified blackening process, and the upper surface of base processes thin scalloped recess, the process of groove plating inner surface, and groove ends points to the fan shape center of base.
Cylindrical coordinates face described in technical scheme is quadrant cylindrical thin wall steel components and modified blackening process, the lower surface in cylindrical coordinates face is vertical with bus, cylindrical coordinates face inside surface evenly processes even depth groove along the vertical direction of generatrix direction and bus, the process of groove plating inner surface.
The beneficial effects of the utility model are:
(1) the utility model directly can only obtain the three-dimensional data points under Descartes's three-dimensional cartesian coordinate system for current existing three-dimensional scaling thing, cannot obtain under cylindrical coordinate system by cylinder radius, height and angle determine the problem of data point, provide a kind of calibration system that directly can obtain the cylindrical coordinates of the data point of Spatial General 6 R position under cylindrical coordinate system, for with measured automobiles angle parameter for detecting the situation of target, due to without the need to carrying out the conversion of Descartes's three-dimensional rectangular coordinate to angle, higher measuring accuracy can be obtained.
(2) the utility model is for the requirement such as the on-site proving of automotive vision detection system is lightweight to calibration system, easy to carry, the mode adopting base and cylindrical coordinates face to combine completes the assembling of calibration system, therefore make calibration system meet portable undersized requirement, reduce the difficulty that three-dimensional scaling system transfer uses.
(3) the utility model have employed electroplating processes to the groove as identification marking, and other parts are blackening process, makes the groove gradation of image contrast of identification division more obvious, improves the accuracy identifying and demarcate.
(4) critical part of the present utility model adopts etalon steel to process, and first, standard steel section output is large, and machining operation is few, and make simple, production cost is lower; Secondly, as the important accessory of surveying instrument, adopt standard steel section to have certain intensity, can be indeformable in Long-Time Service, ensure the precision measured, the requirement of national standard to measuring accuracy can be met.
Accompanying drawing explanation
Fig. 1 is the left axonometric drawing of the camera calibration target of automotive vision detection system based on cylindrical coordinates;
Fig. 2 is the right axonometric drawing of the camera calibration target of automotive vision detection system based on cylindrical coordinates;
In figure: 1. base, 2. cylindrical coordinates face.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Consult Fig. 1 to Fig. 2, the camera calibration target based on the automotive vision detection system of cylindrical coordinates includes base 1 and cylindrical coordinates face 2.
Base 1 is 90 ° of fan-shaped Steel Thin-Wall workpieces and modified blackening process, the upper surface of base 1 processes thin scalloped recess, the process of groove plating inner surface, groove ends points to the fan shape center of base 1, cylindrical coordinates face 2 is quadrant cylindrical thin wall steel components and modified blackening process, the lower surface in cylindrical coordinates face 2 is vertical with bus, cylindrical coordinates face 2 inside surface evenly processes even depth groove along the vertical direction of generatrix direction and bus, the process of groove plating inner surface, the curved edge of base 1 upper surface is welded and fixed after placing with the arcuate lower surface in cylindrical coordinates face 2 is concentric and is connected, bimestrial Ageing Treatment is carried out after welding.
Using method based on the camera calibration target of the automotive vision detection system of cylindrical coordinates: the camera calibration target of the automotive vision detection system based on cylindrical coordinates is placed on a fixed position within the scope of the camera field of view of automotive vision detection system, by camera acquisition one width target image, filtering is carried out to image, grey level enhancement, Iamge Segmentation, extract the image coordinate that the steps such as the cylinder centre coordinate extraction of the thin groove sensing of base 1 obtain cylindrical coordinates face 2 groove intersection point, according to the locus coordinate of cylindrical coordinates face 2 groove intersection point under cylindrical coordinate system and two-dimensional image intersecting point coordinate, adopt least square method, particle swarm optimization algorithm or genetic algorithm, the cylindrical coordinates transition matrix of the two-dimensional coordinate of the image characteristic point of volume coordinate under cylindrical coordinate system and camera acquisition can be obtained, complete the demarcation of the video camera of automotive vision detection system.
Claims (3)
1. the camera calibration target based on the automotive vision detection system of cylindrical coordinates, it is characterized in that, the camera calibration target of the described automotive vision detection system based on cylindrical coordinates is made up of base (1) and cylindrical coordinates face (2);
The curved edge of base (1) upper surface is welded and fixed after placing with the arcuate lower surface of cylindrical coordinates face (2) is concentric and is connected, and carries out bimestrial Ageing Treatment after welding.
2. according to the camera calibration target of the automotive vision detection system based on cylindrical coordinates according to claim 1, it is characterized in that described base (1) is 90 ° of fan-shaped Steel Thin-Wall workpieces and modified blackening process, the upper surface of base (1) processes thin scalloped recess, the process of groove plating inner surface, groove ends points to the fan shape center of base (1).
3. according to the camera calibration target of the automotive vision detection system based on cylindrical coordinates according to claim 1, it is characterized in that described cylindrical coordinates face (2) is for quadrant cylindrical thin wall steel components and modified blackening process, the lower surface in cylindrical coordinates face (2) is vertical with bus, cylindrical coordinates face (2) inside surface evenly processes even depth groove along the vertical direction of generatrix direction and bus, the process of groove plating inner surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201420438436.4U CN204154288U (en) | 2014-08-05 | 2014-08-05 | Based on the camera calibration target of the automotive vision detection system of cylindrical coordinates |
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| CN201420438436.4U CN204154288U (en) | 2014-08-05 | 2014-08-05 | Based on the camera calibration target of the automotive vision detection system of cylindrical coordinates |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181817A (en) * | 2015-10-13 | 2015-12-23 | 广州丰谱信息技术有限公司 | Ultrasonic detection cylindrical coordinate scanner driven by program-controlled distribution type motors and control method of device |
| CN106066154A (en) * | 2016-05-25 | 2016-11-02 | 厦门大学 | A kind of target being applicable to quickly scan scene and the extracting method at control point thereof |
| CN104180775B (en) * | 2014-08-05 | 2017-01-11 | 吉林大学 | Cylindrical surface coordinate based camera calibration target of automobile vision detection system |
-
2014
- 2014-08-05 CN CN201420438436.4U patent/CN204154288U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104180775B (en) * | 2014-08-05 | 2017-01-11 | 吉林大学 | Cylindrical surface coordinate based camera calibration target of automobile vision detection system |
| CN105181817A (en) * | 2015-10-13 | 2015-12-23 | 广州丰谱信息技术有限公司 | Ultrasonic detection cylindrical coordinate scanner driven by program-controlled distribution type motors and control method of device |
| CN105181817B (en) * | 2015-10-13 | 2018-10-02 | 广州丰谱信息技术有限公司 | The program-controlled motor-driven supersonic sounding cylindrical coordinates scanning means of distribution |
| CN106066154A (en) * | 2016-05-25 | 2016-11-02 | 厦门大学 | A kind of target being applicable to quickly scan scene and the extracting method at control point thereof |
| CN106066154B (en) * | 2016-05-25 | 2019-02-01 | 厦门大学 | A kind of extracting method of target and its control point suitable for quickly scanning scene |
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