求感兴趣区域灰度值小程序（适合多幅图像中提取感兴趣区域，是多目标检测抗干扰的优秀方法）只要将感兴趣区的坐标分别写在r,c变量下形成闭合区域就行。-Gray value for a small region of interest program (for multiple images to extract region of interest, is a multi-target detection of excellent anti-jamming methods) as long as t