cntrd: calculates the centroid of bright spots to sub-pixel accuracy. Inspired by Grier & Crocker s feature for IDL, but greatly simplified and optimized for matlab INPUTS: im: image to process, particle should be bright spots on dark

利用matlab针对图像进行马氏距离计算 ,表示出两帧图像间各个像素点的相对情况，非常适合计算机视觉方面的研究使用。- Using matlab to calculate the Mahalanobis distance for the image, Between two images showing the relative circumstances of each pixel, Very suitable for the study using computer vision.