简述不同的阀值策略对于图像阴影的检测，还有他们之间不能的效率和应用场合-Image diff erence threshold strategies and shadow detection

包含五个源码，分别实现打开摄像头、拍照并存盘、向窗口输出图像、对图像进行轮廓检测、关闭摄像头五个功能-Consists of five source, respectively, to achieve open the camera, take pictures and save the file to the window output image, the image contour detection, close the camera features five

包含五个源码，分别实现打开摄像头、拍照并存盘、向窗口输出图像、对图像进行轮廓检测、关闭摄像头五个功能-Consists of five source, respectively, to achieve open the camera, take pictures and save the file to the window output image, the image contour detection, close the camera features five