Normalized Cross Correlation Operating (NCCO) between two binary images, template image and target image, is independent of their gray levels. Further more, providing the template is a binary image, the calculation results of NCCO should remain unrelated to the gray level of the template image. This paper proved the inference above and presented some methods to improve the pattern matching algorithms. These methods can be applied to the microscopic vision field, where the majority of images are low in their g…
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