如何解决在Mac上使用Python和OpenCV时，DestroyWindow不会关闭窗口
|| 我的程序使用以下代码生成一系列窗口：def display(img,name,fun):
global clicked
cv.NamedWindow(name,1)
cv.ShowImage(name,img)
cv.SetMouseCallback(name,fun,img)
while cv.WaitKey(33) == -1:
if clicked == 1:
clicked = 0
cv.ShowImage(name,img)
cv.DestroyWindow(name)
解决方法
OpenCV中的GUI有一些特殊之处。除非调用
waitKey
waitKey(1)
destroyWindow
destroyWindow
cv.startWindowThread()
cv2
cv
import cv2 as cv
import time
WINDOW_NAME = \"win\"
image = cv.imread(\"ela.jpg\",cv.CV_LOAD_IMAGE_COLOR)
cv.namedWindow(WINDOW_NAME,cv.CV_WINDOW_AUTOSIZE)
initialtime = time.time()
cv.startWindowThread()
while (time.time() - initialtime < 5):
print \"in first while\"
cv.imshow(WINDOW_NAME,image)
cv.waitKey(1000)
cv.waitKey(1)
cv.destroyAllWindows()
cv.waitKey(1)
initialtime = time.time()
while (time.time() - initialtime < 6):
print \"in second while\"
cv2.destroyAllWindows()
cv2.waitKey(1)
cv2.waitKey(1)
cv2.waitKey(1)
cv2.waitKey(1)
cv2.destroyAllWindows()
for i in range (1,5):
cv2.waitKey(1)
cv2.namedWindow(\"image\")
cv2.imshow(\'image\',img)
cv2.waitKey(0) # close window when a key press is detected
cv2.destroyWindow(\'image\')
cv2.waitKey(1)
for i in range(1,10):
cv2.destroyAllWindows()
cv2.waitkey(1)
WINDOW_NAME = \"win\"
image = cv.imread(\"foto.jpg\",0)
cv.namedWindow(WINDOW_NAME,cv.CV_WINDOW_AUTOSIZE)
cv.startWindowThread()
cv.imshow(WINDOW_NAME,image)
cv.waitKey()
cv.destroyAllWindows()
cv2.destroyWindow
cv2.imshow
highgui
cv2.waitKey
cv2.namedWindow
import cv2
threadDie = True # change this to false elsewhere to stop getting the video
def getVideo(Message):
print Message
print \"Opening url\"
video = cv2.VideoCapture(\"rtsp://username:passwordp@IpAddress:554/axis-media/media.amp\")
print \"Opened url\"
fourcc = cv2.cv.CV_FOURCC(\'X\',\'V\',\'I\',\'D\')
fps = 25.0 # or 30.0 for a better quality stream
writer = cv2.VideoWriter(\'out.avi\',fourcc,fps,(640,480),1)
i = 0
print \"Reading frames \"
while threadDie:
ret,img = video.read()
print \"frame number: \",i
i=i+1
writer.write(img)
del(video)
print \"Finished capturing video\"
vlc out.avi #out.avi is my video file being saved by the function above.
import cv2
import numpy as np
# Create a VideoCapture object
cap = cv2.VideoCapture(0)
# Check if camera opened successfully
if (cap.isOpened() == False):
print(\"Unable to read camera feed\")
# Default resolutions of the frame are obtained.The default resolutions are system dependent.
# We convert the resolutions from float to integer.
frame_width = int(cap.get(3))
frame_height = int(cap.get(4))
# Define the codec and create VideoWriter object.The output is stored in \'outpy.avi\' file.
out = cv2.VideoWriter(\'outpy.avi\',cv2.VideoWriter_fourcc(\'M\',\'J\',\'P\',\'G\'),10,(frame_width,frame_height))
while(True):
ret,frame = cap.read()
if ret == True:
# Write the frame into the file \'output.avi\'
out.write(frame)
# Display the resulting frame
cv2.imshow(\'frame\',frame)
# Press Q on keyboard to stop recording
if cv2.waitKey(1) & 0xFF == ord(\'q\'):
break
# Break the loop
else:
break
# When everything done,release the video capture and video write objects
cap.release()
out.release()
# Closes all the frames
cv2.destroyAllWindows()
import cv2 as cv
cv.namedWindow(\"image\")
img = cv.imread(\"image_name.jpg\")
cv.imshow(\"image\",img)
cv.waitKey(5000) # 5 sec delay before image window closes
cv.destroyWindow(\"image\")
cv.waitKey(positive Integer)
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