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face_data_collect.py
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import cv2
import os
# 调用笔记本内置摄像头,所以参数为0,如果有其他的摄像头可以调整参数为1,2
cap = cv2.VideoCapture(0)
face_detector = cv2.CascadeClassifier('./haarcascade_frontalface_default.xml')
face_id = input('\n enter user id:')
print('\n Initializing face capture. Look at the camera and wait ...')
count = 0
while True:
# 从摄像头读取图片
sucess, img = cap.read()
# 转为灰度图片
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
# 检测人脸
faces = face_detector.detectMultiScale(gray, 1.3, 5)
for (x, y, w, h) in faces:
cv2.rectangle(img, (x, y), (x+w, y+w), (255, 0, 0))
count += 1
# 保存图像
cv2.imwrite("face_data/User." + str(face_id) + '.' + str(count) + '.jpg', gray[y: y + h, x: x + w])
cv2.imshow('image', img)
# 保持画面的持续。
k = cv2.waitKey(1)
if k == 27: # 通过esc键退出摄像
break
elif count >= 100: # 得到1000个样本后退出摄像
break
# 关闭摄像头
cap.release()
cv2.destroyAllWindows()