图片人脸检测
#coding=utf-8
import cv2
import dlib
path = “img/meinv.png”
img = cv2.imread(path)
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
#人脸分类器
detector = dlib.get_frontal_face_detector()
# 获取人脸检测器
predictor = dlib.shape_predictor(
“C:\\Python36\\Lib\\site-packages\\dlib-data\\shape_predictor_68_face_landmarks.dat”
)
dets = detector(gray, 1)
for face in dets:
shape = predictor(img, face) # 寻找人脸的68个标定点
# 遍历所有点，打印出其坐标，并圈出来
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()
视频人脸检测
# coding=utf-8
import cv2
import dlib
detector = dlib.get_frontal_face_detector() #使用默认的人类识别器模型
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):
break
cap.release()
cv2.destroyAllWindows()
那么，OpenCV和Dlib的视频识别对比，有两个地方是不同的：
1.Dlib模型识别的准确率和效果要好于OpenCV；
2.Dlib识别的性能要比OpenCV差，使用视频测试的时候Dlib有明显的卡顿，但是OpenCV就好很多，基本看不出来；
以上就是python实现图片，视频人脸识别(dlib版)的详细内容。
