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[教程] open cv2初探人脸识别 |
最近学习python cv2 ,试着探究下人脸识别; import cv2 # 2、加载图片绝对路径 image = cv2.imread(r'E:\dd\face.jpg') gray = cv2.cvtColor(image,cv2.COLOR_BGR2GRAY) # 3、加载人脸模型 faceCascade = cv2.CascadeClassifier(r'E:\dd\cv3\opencv\sources\data\haarcascades\haarcascade_frontalface_default.xml') faces_rects = faceCascade.detectMultiScale(image,scaleFactor = 1.05, minNeighbors = 5, minSize = (30,30), flags = cv2.CASCADE_SCALE_IMAGE) eye_cascade = cv2.CascadeClassifier(r'E:\dd\cv3\opencv\sources\data\haarcascades\haarcascade_eye.xml') for (x,y,w,h) in faces_rects: img = cv2.rectangle(image,(x,y),(x+w,y+h),(255,0,0),2) roi_gray = gray[y:y+h, x:x+w] roi_color = img[y:y+h, x:x+w] eyes = eye_cascade.detectMultiScale(roi_gray) for (ex,ey,ew,eh) in eyes: cv2.rectangle(roi_color, (ex,ey),(ex+ew,ey+eh),(0,255,0),2) cv2.namedWindow('image',0) cv2.imshow('image',image) cv2.waitKey(0) 人脸模型是在github上https://github.com/XuBaozhao/opencv/tree/master/data/haarcascades 下载的,但在加载人脸模型时会出现bug提示 解决的方案: (1)下载https://nchc.dl.sourceforge.net/project/opencvlibrary/opencv-win/3.4.1/opencv-3.4.1-vc14_vc15.exe,放在哪里都可以(没有测试),把它解压(解压都哪里应该都可以),里面包含上述用到的两个xml文件。 (2)在调用时,用绝对路径进行访问(可能也可以放到公共路径上,没有测试),如faceCascade = cv2.CascadeClassifier(r'E:\dd\cv3\opencv\sources\data\haarcascades\haarcascade_frontalface_default.xml')。 点击运 行: 会出现检测到人脸; 用print可打印出当前人脸的坐标位置: |
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