python3.6 open3.4 人臉識別。搞了半天,記錄下走過的坑。
能夠檢測人臉,還有眼睛。
先上效果:
python
代碼以下:code
import cv2 import sys import os # Get user supplied values imagePath = './heying5.jpg'#sys.argv[1] # Create the haar cascade faceCascade=cv2.CascadeClassifier('D:\opencv\sources\data\haarcascades\haarcascade_frontalface_default.xml')# eyeCascade = cv2.CascadeClassifier("D:\opencv\sources\data\haarcascades\haarcascade_eye.xml") if # Read the image image = cv2.imread(imagePath)#2 # cv2.imshow("frame" , image) gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)#3 # cv2.imshow("frame" , gray) # Detect faces in the image faces = faceCascade.detectMultiScale(gray,scaleFactor=1.15,minNeighbors=5,minSize=(5,5)) #flags=cv2.CASCADE_SCALE_IMAGE #faceCascade.detectMultiScale(gray, scaleFactor = 1.3, minNeighbors = 4, minSize = (32, 32)) print("Found {0} faces!".format(len(faces)))#5 for (x, y, w, h) in faces: cv2.rectangle(image, (x, y), (x+w, y+h), (0, 255, 0), 2) #6 roi_gray_img = gray[y:y + h, x:x + w] roi_img = image[y:y + h, x:x + w] eyes = eyeCascade.detectMultiScale(roi_gray_img, 1.3, 5) for eye_x, eye_y, eye_w, eye_h in eyes: cv2.rectangle(roi_img, (eye_x, eye_y), (eye_x + eye_w, eye_y + eye_h), (255, 0, 0), 2) cv2.imshow("Faces found", image)#7 cv2.waitKey(0) #8
注意:
坑1:orm
faceCascade=cv2.CascadeClassifier('D:\opencv\sources\data\haarcascades\haarcascade_frontalface_default.xml')
不少文章直接寫成:xml
faceCascade=cv2.CascadeClassifier('haarcascade_frontalface_default.xml')
假如代碼運行出錯,找不到haarcascade_frontalface_default.xml文件,必需要單獨安裝opencv的exe的壓縮包,解壓縮後,裏面會有此xml文件,而後把全地址填到這裏。博客
坑2:
不少博客是基於opencv2.x版本的,個人環境是opencv3.4的。3.4中cv2.cv已經沒了....通常狀況直接把cv2.cv.xxx改爲cv2.xxx就行。假如不行的,百度看看換成其餘什麼了。it