OpenCV4入门教程008：RNG()

OpenCV4入门教程037：击中和击不中

OpenCV4入门教程034：顶帽和黑帽

OpenCV4入门教程033：开操作与闭操作

OpenCV4入门教程032：腐蚀与膨胀

OpenCV4入门教程010：imread/imshow/imwrite

OpenCV4入门教程009：Mat()

OpenCV4入门教程011：颜色空间

OpenCV4入门教程005：Point()

OpenCV4入门教程006：Rect()