taking horizontal and vertical correlation of the image and convolve the image

Digital Image Correlation (DIC) is an optical, non-contact method to measure full-field displacements and strains. The only requirement is that the test specimen has a random speckle pattern on its surface, either generated by the experimentalist (i.

像素相关性计算函数，该指标对于衡量一个加密后的图像安全性能-Pixel correlation calculation function, the safety performance indicators for measuring an image after encryption