人脸检测+标注
利用Dlib官方训练好的模型“shape_predictor_68_face_landmarks.dat”进行68点标定,利用 opencv 进行图像化处理,在人脸上画出68个点,并标明序号;
68点标注模型下载: https://github.com/davisking/dlib-models 或者http://dlib.net/files/shape_predictor_68_face_landmarks.dat.bz2
1. 调用dlib库来进行人脸识别,调用预测器“shape_predictor_68_face_landmarks.dat”进行68点标定
2. 存入68个点坐标
3. 利用 cv2.circle 来画68个点
4. 利用 cv2.putText() 函数来画数字1-68
# _*_ coding:utf-8 _*_ import numpy as np import cv2 import dlib detector = dlib.get_frontal_face_detector() predictor = dlib.shape_predictor('shape_predictor_68_face_landmarks.dat') # cv2读取图像 img = cv2.imread("1.jpg") # 取灰度 img_gray = cv2.cvtColor(img, cv2.COLOR_RGB2GRAY) # 人脸数rects rects = detector(img_gray, 0) for i in range(len(rects)): landmarks = np.matrix([[p.x, p.y] for p in predictor(img,rects[i]).parts()]) for idx, point in enumerate(landmarks): # 68点的坐标 pos = (point[0, 0], point[0, 1]) print(idx,pos) # 利用cv2.circle给每个特征点画一个圈,共68个 cv2.circle(img, pos, 5, color=(0, 255, 0)) # 利用cv2.putText输出1-68 font = cv2.FONT_HERSHEY_SIMPLEX cv2.putText(img, str(idx+1), pos, font, 0.8, (0, 0, 255), 1,cv2.LINE_AA) cv2.namedWindow("img", 2) cv2.imshow("img", img) cv2.waitKey(0)
摄像头实时
import dlib import numpy as np detector=dlib.get_frontal_face_detector() predictor=dlib.shape_predictor("./shape_predictor_68_face_landmarks.dat") def Detect_face(camera_idx): # camera_idx: 电脑自带摄像头或者usb摄像头 cv2.namedWindow("detect") cap=cv2.VideoCapture(camera_idx) cap.set(3, 1280) cap.set(4, 1280) while cap.isOpened(): cv2.namedWindow('detect', cv2.WINDOW_AUTOSIZE) ## frame = cv.flip(frame, 1, dst=None) ok,frame=cap.read() if not ok: break gray=cv2.cvtColor(frame,cv2.COLOR_BGR2GRAY) rects=detector(gray,0) for i in range(len(rects)): landmarks = np.matrix([[p.x, p.y] for p in predictor(frame, rects[i]).parts()]) for idx, point in enumerate(landmarks): pos = (point[0, 0], point[0, 1]) # print(idx, pos) cv2.circle(frame, pos, 1, color=(0, 255, 0)) font = cv2.FONT_HERSHEY_SIMPLEX cv2.putText(frame, str(idx + 1), pos, font, 0.4, (0, 255, 255), 1, cv2.LINE_AA) cv2.imshow('detect', frame) c = cv2.waitKey(10) if c & 0xFF == ord('q'): break cap.release() cv2.destroyAllWindows() if __name__=='__main__': Detect_face(0)