Opencv:图片中检测人脸并保存

import cv2   filepath = "xxxx" img = cv2.imread(filepath)  # 读取图片 gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)  # 转换灰色   # OpenCV人脸识别分类器 classifier = cv2.CascadeClassifier(     "C:\Python36\Lib\site-packages\opencv-master\data\haarcascades\haarcascade_frontalface_default.xml" ) color = (0, 255, 0)  # 定义绘制颜色 # 调用识别人脸 faceRects = classifier.detectMultiScale(     gray, scaleFactor=1.2, minNeighbors=3, minSize=(32, 32)) if len(faceRects):  # 大于0则检测到人脸     for faceRect in faceRects:  # 单独框出每一张人脸         x, y, w, h = faceRect         # 框出人脸         cv2.rectangle(img, (x, y), (x + h, y + w), color, 2)         # 左眼         cv2.circle(img, (x + w // 4, y + h // 4 + 30), min(w // 8, h // 8),                    color)         # 右眼         cv2.circle(img, (x + 3 * w // 4, y + h // 4 + 30), min(w // 8, h // 8),                    color)         # 嘴巴         cv2.rectangle(img, (x + 3 * w // 8, y + 3 * h // 4),                       (x + 5 * w // 8, y + 7 * h // 8), color)   cv2.imshow("image", img)  # 显示图像 c = cv2.waitKey(10)   cv2.waitKey(0) cv2.destroyAllWindows()  

来源：博客园

作者：Jumpkin1122

链接：https://www.cnblogs.com/jumpkin1122/p/11509787.html