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后,我想提取只能通过我的代码检测口的矩形部分突出口区我怎么能做到这一点:OpenCV的 - 检测
import numpy as np
import cv2
face_cascade = cv2.CascadeClassifier('/usr/local/share/OpenCV/haarcascades/haarcascade_frontalface_default.xml')
mouth_cascade = cv2.CascadeClassifier('/usr/local/share/OpenCV/haarcascades/haarcascade_smile.xml')
img = cv2.imread('Images/image_0033.jpg')
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
faces = face_cascade.detectMultiScale(gray, 1.3, 5)
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]
mouth = mouth_cascade.detectMultiScale(roi_gray,2.0,25)
for (ex,ey,ew,eh) in mouth:
cv2.rectangle(roi_color,(ex,ey),(ex+ew,ey+eh),(0,255,0),3)
cv2.imshow('img',nwimg)
cv2.waitKey(0)
cv2.destroyAllWindows()
如上代码看到我只是要提取的矩形口区域我已经使用命令,如var = img[y:y+h,x:x+w]
,但这没有奏效。
我已经检测到面部的嘴现在我想执行imwrite()命令和图像只应嘴巴而不是全脸如何做到这一点 –