Precision measurement method for flat crack and antenna crack
A crack antenna and precision measurement technology, which is applied in the direction of measurement devices, optical testing flaws/defects, image data processing, etc., can solve the problems of slow measurement speed, high price, high cost, etc., to improve measurement accuracy, shorten detection time, and automate high degree of effect
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[0039] like figure 1 As shown, an image extraction device such as a CCD camera is electrically connected to an image acquisition card interfaced with a computer, and the CCD camera transmits and converts image data to be read by the computer through image acquisition. The image information obtained by the computer is expressed in the unit of pixel. If the actual measurement result value is to be given, the corresponding relationship between the digital image pixel and the actual size must be established. It is necessary to convert the CCD image coordinates to the table coordinates, so before measuring, the conversion coefficient K from the CCD coordinate system to the table coordinate system needs to be calibrated first. Calibration is actually to determine the actual physical size represented by each pixel. Whether the calibration is accurate or not will directly affect the measurement accuracy of the image measurement system.
[0040] figure 2 A flow chart of the embodim...
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