Web Reference: May 28, 2015 · This error means that the XML file could not be found. The library needs you to pass it the full path, even though you’re probably just using a file that came with the OpenCV library. May 5, 2024 · The ‘ (-215) !empty () in function detectMultiScale’ error in Python 3 often occurs due to issues with loading or processing the input image. By checking if the image is empty or not loaded properly, and ensuring that the image has compatible dimensions, you can troubleshoot and resolve this error. It typically indicates that the image you attempted to pass to the cv2.cvtColor() function (for color space conversion) was not loaded correctly and is essentially empty or None. This guide explains the primary causes and how to fix them.
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