此代码用于识别图片中火焰,整体思路为通过对图像的颜色处理找出图中感兴趣区域(可能为火焰的区域)及其 轮廓, 再提取轮廓的几何特征判断是否为火焰(This code is used to identify the flame in the picture. The overall idea is to find out the area of interest (possibly the area of flame) and its contour in the picture through c