如何在Mac上针对python 2.7进行OpenCV人脸检测。我尝试了许多不同的代码,但是它们都不起作用。我正在终端中运行它们。您能否给我一个网站或代码的链接。
我收到此错误:
cv2.error: OpenCV(4.0.0) /Users/travis/build/skvark/opencv-python/opencv/modules/objdetect/src/cascadedetect.cpp:1658: error: (-215:Assertion failed) !empty() in function 'detectMultiScale'
使用以下代码:
import numpy as np
import cv2
faceCascade =
cv2.CascadeClassifier('Cascades/haarcascade_frontalface_default.xml')
cap = cv2.VideoCapture(0)
cap.set(3,640) # set Width
cap.set(4,480) # set Height
while True:
ret, img = cap.read()
img = cv2.flip(img, -1)
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
faces = faceCascade.detectMultiScale(
gray,
scaleFactor=1.2,
minNeighbors=5,
minSize=(20, 20)
)
for (x,y,w,h) in faces:
cv2.rectangle(img,(x,y),(x+w,y+h),(255,0,0),2)
roi_gray = gray[y:y+h, x:x+w]
roi_color = img[y:y+h, x:x+w]
cv2.imshow('video',img)
k = cv2.waitKey(30) & 0xff
if k == 27: # press 'ESC' to quit
break
cap.release()
cv2.destroyAllWindows()
答案 0 :(得分:0)
您的错误消息表明文件路径可能无效,程序找不到 .xml 文件。并且您可能想用诸如'Cascades/haarcascade_frontalface_default.xml'
'username/file/../cascade.xml'