图像处理。从CCD相机获得的激光狭缝衍射图片，经过MATLAB处理，计算出衍射光强的最大和最小值。（对应的光强用像素数表示。波峰光强最大，波谷光强最小。程序算出波峰和波谷的像素数）-The image processing. Laser slit diffraction image　CCD camera, after processing, MATLAB to calculate the diffraction intensity of maximum and minimum values. Corresponding intensity expressed in pixels. (wave intensity is the largest, the wave trough intensity is minimal. Calculate the number of peaks and troughs)