Method for automatically setting detection area
A detection area, automatic technology, applied in the direction of image data processing, instruments, calculations, etc., can solve the problems of non-standard detection area, difficult selection of standard materials, decline in detection effect, etc.
Active Publication Date: 2018-09-28
WEIFANG LOKOMO PRECISION IND
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Problems solved by technology
Advantages, if the selected standard material is standard enough, the detection area can better select the "interesting" area; disadvantage, the standard material is not easy to select, if the selected material is not "standard", the obtained detection area is not standard, resulting in detection effect decline
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[0038] Below in conjunction with accompanying drawing and embodiment, further elaborate the present invention.
[0039] Before the material processing design process, there are engineering design drawings. The description information of engineering design drawings includes product design size requirements, processing standards, size edge shapes (straight lines, arcs, etc.), specification marks, etc. The electronic drawing file is composed of a fixed file format, which records the information of the engineering design drawing. By analyzing the fixed-format drawing files, the size specifications and edge information of materials can be obtained. A method for automatically setting a detection area, comprising the following steps:
[0040]Step 1. Before the detection is executed, the detection camera is calibrated in advance to obtain the mapping relationship between the world coordinate system and the image coordinate system, and save the data information to the local data;
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The invention discloses a method for automatically setting a detection area and relates to the technical field of product detection, wherein an engineering design drawing is analyzed, the basic graphic elements of the material, such as a straight line, an arc, etc., are obtained, a position retrieval algorithm is used and the obtained graphic elements can be used for creating a standard closed polygon area as a detection area, wherein the detection area belongs to a world coordinate system; being calibrated, a detection camera can obtain the mapping relationship between the world coordinate system and an image coordinate system and maps a detection area to the image coordinate system to obtain the detection area in the image coordinate system, and finally the detection area is automatically set. The method for automatically setting the detection area of the invention reduces the complexity of the calibration process in the visual software, has more standardized generated detection area, and reduces the coupling effect of the quality of the selected material to the detection effect when the material is calibrated.
Description
technical field [0001] The invention belongs to the technical field of product detection, in particular to a method for automatically setting a detection area. Background technique [0002] When doing visual inspection of magnet material appearance defects, it is necessary to set the detection area. At present, there are many ways to set the visual inspection area: [0003] Manually set the detection area. According to the requirements of the detection position, usually a rectangle, circle, ellipse, polygonal area, etc. can be set as the detection area. The advantage is that the setting is simple, but the shape of the setting area is fixed, and it cannot guarantee to cover all the "interesting" areas without adding "uninteresting" areas; [0004] Real-time detection generates detection regions. During the detection process, image segmentation and other means are used to obtain the "interesting" area of the material in real time, and the material in the area is detected....
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Login to View More IPC IPC(8): G06T7/00G06T7/80
CPCG06T7/0002G06T7/80G06T2207/10004G06T2207/30108
Inventor 沈明锋王克生吕建涛袁旗周民刚
Owner WEIFANG LOKOMO PRECISION IND