cv2destroyWindow

cv2destroyWindow is a function in OpenCV’s Python interface used to close a specific window that was created with cv2.imshow or cv2.namedWindow. It belongs to the high-level GUI module and is commonly used to manage on-screen windows during image or video display.

The function takes a single argument: windowName, a string that identifies the window to destroy. When invoked, the named window is closed and its resources are released. If the window does not exist, the function has no effect and typically raises no error, depending on the backend.

Usage is straightforward in programs that display images or video frames. For example, after showing an image with cv2.imshow('Example', img), you can close that window with cv2.destroyWindow('Example'). If multiple named windows were created, each may be closed individually using their respective names. Alternatively, cv2.destroyAllWindows() can be used to close all open windows at once.

Notes and considerations: cv2.destroyWindow requires a GUI backend to be available; it may not function in headless environments or when GUI support is not enabled. It is often used after a waitKey loop to ensure a clean shutdown of the display windows. Related functions include cv2.destroyAllWindows and cv2.namedWindow, which together provide broader window management capabilities.