Printed circuit board image registration method based on shape context of mass center of communicated region
A technology of printed circuit boards and connected areas, applied in the field of digital image processing, to achieve high efficiency, high precision, and strong robustness
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[0052] Embodiment: adopt the method of the present invention to carry out registration to two PCB film images, image 3 (a) and image 3 (b) respectively represent the binarized reference image and the image to be registered, known image 3 (a) and image 3 There is a rotation and translation transformation between (b), and image 3 (a) and image 3 The exact rotation angle between (b) is 9.5 degrees, and the number of rotation angles estimated by the method of the present invention is 9.4999 degrees, which shows that the transformation parameters estimated by the method of the present invention have very high precision. image 3 (c) is a reference image registered with the image to be registered; image 3 (d) for image 3 (b) with image 3 (c) difference image; image 3 (e) for image 3 The result of the morphological opening operation in (d), the morphological structural element used is a 2x2 rectangular structural element. from image 3 It can be seen that after u...
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