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<p>我在<code>Python</code>中有一个算法<a href="http://docs.opencv.org/master/d7/d8b/tutorial_py_face_detection.html#gsc.tab=0" rel="nofollow noreferrer">Viola-Jones</a>。我使用的是<code>haarcascade</code>xml,它是从<code>openCV</code>根文件加载的。但是<code>openCV</code>中没有任何用于口腔和鼻子的xml文件,所以我从<a href="https://sourceforge.net/p/emgucv/opencv/ci/d58cd9851fdb592a395488fc5721d11c7436a99c/tree/data/haarcascades/" rel="nofollow noreferrer">EmguCV</a>下载了这些文件。对面部的检测结果是可以的,但眼睛的检测效果不好,用嘴鼻子检测的效果很差。我试图更改<code>face_cascade.detectMultiScale</code>中的参数,但一点帮助都没有。在</p>
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<p><strong>我的代码:</strong></p>
<pre><code>import cv2
import sys
def facedet(img):
face_cascade = cv2.CascadeClassifier('/home/kattynka/opencv/data/haarcascades/haarcascade_frontalface_default.xml')
eye_cascade = cv2.CascadeClassifier('/home/kattynka/opencv/data/haarcascades/haarcascade_eye.xml')
mouth_cascade = cv2.CascadeClassifier('/home/kattynka/opencv/data/haarcascades/haarcascade_mcs_mouth.xml')
nose_cascade = cv2.CascadeClassifier('/home/kattynka/opencv/data/haarcascades/haarcascade_mcs_nose.xml')
img = cv2.imread(img)
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]
eyes = eye_cascade.detectMultiScale(roi_gray)
nose = nose_cascade.detectMultiScale(roi_gray)
mouth = mouth_cascade.detectMultiScale(roi_gray)
for (ex,ey,ew,eh) in eyes:
cv2.rectangle(roi_color, (ex,ey), (ex+ew, ey+eh), (0,255,0), 2)
for (nx, ny, nw, nh) in nose:
cv2.rectangle(roi_color, (nx, ny), (nx + nw, ny + nh), (0, 0, 255), 2)
for (mx, my, mw, mh) in mouth:
cv2.rectangle(roi_color, (mx, my), (mx + mw, my + mh), (0, 0, 0), 2)
cv2.namedWindow('image', cv2.WINDOW_NORMAL)
cv2.imshow('image',img)
cv2.waitKey(0)
cv2.destroyAllWindows()
if __name__ == '__main__':
#img = sys.argv[1]
facedet(img)
</code></pre>
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<p><strong>我的问题</strong></p>
<p>我做错什么了?有没有简单的解决办法,能给我一个更好的结果?在</p>
<hr/>
<p><strong>输出:</strong></p>
<p><a href="https://i.stack.imgur.com/VOdIj.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/VOdIj.png" alt="enter image description here"/></a></p>
<p><a href="https://i.stack.imgur.com/G2MBq.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/G2MBq.png" alt="enter image description here"/></a></p>
<p><a href="https://i.stack.imgur.com/PjSX5.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/PjSX5.png" alt="enter image description here"/></a></p>
<p><a href="https://i.stack.imgur.com/zye32.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/zye32.png" alt="enter image description here"/></a></p>