以opencv 245 版本 製作的鏡頭人臉偵測，有兩段程式碼，第一段為鏡頭偵測人臉，如果沒鏡頭會跳至第二段程式碼為偵測lena.png圖片-Produced by opencv 245 version of the lens face detection, there are two pieces of code, the first paragraph of the lens detect human faces, if not the lens will jump second secti