圖片人臉檢測

#coding=utf-8import cv2import dlibpath = 'img/meinv.png'img = cv2.imread(path)gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)#人臉分類器detector = dlib.get_frontal_face_detector()# 獲取人臉檢測器predictor = dlib.shape_predictor( 'C:Python36Libsite-packagesdlib-datashape_predictor_68_face_landmarks.dat')dets = detector(gray, 1)for face in dets: shape = predictor(img, face) # 尋找人臉的68個(gè)標(biāo)定點(diǎn) # 遍歷所有點(diǎn)，打印出其坐標(biāo)，并圈出來 for pt in shape.parts(): pt_pos = (pt.x, pt.y) cv2.circle(img, pt_pos, 2, (0, 255, 0), 1) cv2.imshow('image', img)cv2.waitKey(0)cv2.destroyAllWindows()

視頻人臉檢測

# coding=utf-8import cv2import dlibdetector = dlib.get_frontal_face_detector() #使用默認(rèn)的人類識別器模型def discern(img): gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY) dets = detector(gray, 1) for face in dets: left = face.left() top = face.top() right = face.right() bottom = face.bottom() cv2.rectangle(img, (left, top), (right, bottom), (0, 255, 0), 2) cv2.imshow('image', img)cap = cv2.VideoCapture(0)while (1): ret, img = cap.read() discern(img) if cv2.waitKey(1) & 0xFF == ord(’q’): breakcap.release()cv2.destroyAllWindows()

那么，OpenCV和Dlib的視頻識別對比，有兩個(gè)地方是不同的：

1.Dlib模型識別的準(zhǔn)確率和效果要好于OpenCV；

2.Dlib識別的性能要比OpenCV差，使用視頻測試的時(shí)候Dlib有明顯的卡頓，但是OpenCV就好很多，基本看不出來；

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