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A method and device for identifying pcb components
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A recognition method and PCB board technology, applied in the field of optical detection, can solve the problems of low recognition accuracy and stability, recognition process interference, and low recognition efficiency, and achieve strong anti-background interference and anti-light conditions, and production process interference Small, versatile effects
Active Publication Date: 2019-03-05
GUANGZHOU SHIYUAN ELECTRONICS CO LTD
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Using manual recognition will have problems such as low recognition efficiency and strong subjectivity, while using the method of view matching, the pictures to be tested collected under different light intensities will have a great impact on the entire recognition result, and the background color of the PCB board will be different. Serious interference to the recognition process, low recognition accuracy and stability
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Embodiment 1
[0057] see figure 1 , is a schematicflow chart of an embodiment of the method for identifying PCB components provided by the present invention. This method is applicable to the identification of all non-solid color components. The method includes the following steps:
[0058] Step 101: Obtain a picture of the PCB board to be tested.
[0059] In this embodiment, the PCB board to be tested is photographed by a color camera to obtain a picture of the PCB board to be tested, and the area of the captured image needs to include the entire PCB board.
[0060] Step 102: Calibrate the picture of the PCB board to be tested to obtain a calibration picture.
[0061]In this embodiment, since the position of the PCB board may change during the photographing process, the position and scale of the PCB board in the photographed pictures are different. At this time, it is necessary to calibrate the captured pictures according to the set feature information and affine transformation of the ...
Embodiment 2
[0082] see figure 2 , figure 2 It is a structural schematic diagram of an embodiment of the identification device for PCB components provided by the present invention. The device includes: an acquisition module 201 , a calibration module 202 , a first matching module 203 , an extraction and filtering module 204 , a histogram generation module 205 and a second matching module 206 .
[0083] The obtaining module 201 is used to obtain the picture of the PCB board to be tested.
[0084] The calibration module 202 is electrically connected to the acquisition module 201, and is used for calibrating the picture of the PCB board to be tested to obtain the calibration picture.
[0085] The first matching module 203 is electrically connected to the calibration module 202, and is used to match the calibration picture with the component template picture to obtain a matching area;
[0086] An extraction and filtering module 204, electrically connected to the first matching module 203,...
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Abstract
The invention discloses a method and a device for identifying elements of a PCB (Printed Circuit Board). The method comprises the following steps of acquiring a to-be-detected PCB picture; calibrating the to-be-detected PCB picture to obtain a calibrated picture; matching an element template picture with the calibrated picture to obtain a matching area; extracting the tone and saturation information of the matching area; generating a to-be-detected histogram according to the tone and saturation information of the matching area; matching the to-be-detected histogram with a standard histogram to obtain an identification result. By adoption of the technical scheme, the identification accuracy rate of the elements can be improved, and influence on the identification result caused by a background color and different brightness is avoided.
Description
technical field [0001] The invention relates to the technical field of optical detection, in particular to an identification method and device for PCB components. Background technique [0002] In the process of PCB board production, various components need to be inserted on the PCB. opposite phenomenon. Existing PCB component detection adopts manual detection or matches multiple views of the PCB board to be tested with standard views, so as to identify whether there is a problem with the pins of the PCB board. Using manual recognition will have problems such as low recognition efficiency and strong subjectivity, while using the method of view matching, the pictures to be tested collected under different light intensities will have a great impact on the entire recognition result, and the background color of the PCB board will be different. Serious interference is caused to the recognition process, and the recognition accuracy and stability are low. Contents of the inventi...
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Application Information
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