When executing an OpenCV python script containing: cv2.imshow(img) the resulting window opens behind my terminal window. This is a mild irritation - is there any way to get it to initially open in front / on top?
A number of people have asked questions (here and here) about forcing persistent behaviour but this is, I think, simpler.
Platform OS X and OpenCV 2.4.11
3 Answers
Answers 1
Open a namedWindow before imshow, for instance:
cv2.namedWindow('ImageWindowName', cv2.WINDOW_NORMAL) cv2.imshow('ImageWindowName',img) cv2.waitKey(0) cv2.destroyAllWindows() Comment if this makes any different.
Answers 2
I can do what I think you want by adding a single line to the following file in the OpenCV distribution:
modules/highgui/src/window_cocoa.mm It is around line 568, and is the single line after the word SETCHELL in the code below:
[window setFrameTopLeftPoint:initContentRect.origin]; [window setFirstContent:YES]; [window setContentView:[[CVView alloc] init]]; [window setHasShadow:YES]; [window setAcceptsMouseMovedEvents:YES]; [window useOptimizedDrawing:YES]; [window setTitle:windowName]; [window makeKeyAndOrderFront:nil]; // SETCHELL - raise window to top of stacking order [window setLevel:CGWindowLevelForKey(kCGMaximumWindowLevelKey)]; [window setAutosize:(flags == CV_WINDOW_AUTOSIZE)]; [windows setValue:window forKey:windowName]; [localpool drain]; return [windows count]-1; } CV_IMPL int cvWaitKey (int maxWait) { Answers 3
One way to work around this would be to set all windows from OpenCV "frontmost" using AppleScript.
subprocess.call(["/usr/bin/osascript", "-e", 'tell app "Finder" to set frontmost of process "Python" to true']) This way, all windows should be brought to the front.
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