【demo】用opencv+qt識別人臉與眼睛
阿新 • • 發佈:2018-12-10
import cv2
import time
'''
基於opencv和QT的瞳孔精確檢測程式
https://blog.csdn.net/zyx1990412/article/details/51219076
基於QT和opencv的瞳孔定位及跟蹤程式
https://blog.csdn.net/zyx1990412/article/details/51254127
'''
def eyeDetect():
#eye_cascade = cv2.CascadeClassifier('haarcascade_eye.xml')
eye_cascade = cv2.CascadeClassifier('haarcascade_eye_tree_eyeglasses.xml' )
face_cascade = cv2.CascadeClassifier('haarcascade_frontalface_alt.xml')
#lefteye_cascade =cv2.CascadeClassifier('/home/hx-104b/眼動追蹤/haarcascade_lefteye_2splits.xml')
camera = cv2.VideoCapture(0)
while (True):
stime = time.time()
ret, frame = camera.read()
if ret:
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
#gray1 = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
#得到位置資訊x,y,w,h
eyes = eye_cascade.detectMultiScale(gray, 1.1, 8, 0 , (30, 30))
face = face_cascade.detectMultiScale(gray, 1.1, 5, 0 , (40, 40))
#3. double scaleFactor=1.1:這個是每次縮小影象的比例,預設是1.1
# 4. minNeighbors=3:匹配成功所需要的周圍矩形框的數目,每一個特徵匹配到的區域都是一個矩形框,只有多個矩形框同時存在的時候,才認為是匹配成功,比如人臉,這個預設值是3。
# 5. flags=0:可以取如下這些值:
# CASCADE_DO_CANNY_PRUNING=1, 利用canny邊緣檢測來排除一些邊緣很少或者很多的影象區域
# CASCADE_SCALE_IMAGE=2, 正常比例檢測
# CASCADE_FIND_BIGGEST_OBJECT=4, 只檢測最大的物體
# CASCADE_DO_ROUGH_SEARCH=8 初略的檢測
# 6. minObjectSize maxObjectSize:匹配物體的大小範圍
print (eyes)
for (ex, ey, ew, eh) in eyes:
cv2.rectangle(frame, (ex, ey), (ex+ew, ey+eh), (0, 255, 0), 2)
for (ex, ey, ew, eh) in face:
cv2.rectangle(frame, (ex, ey), (ex+ew, ey+eh), (0, 0, 255), 2)
cv2.imshow('VideoFaceDetect', frame)
#print ("{:.1f} fps".format(1/(time.time()-stime)))
k = cv2.waitKey(1)
if k == ord("q"):
break
camera.release()
cv2.destroyAllWindows()
if __name__ == '__main__':
eyeDetect()