This error occurs when you try to set a Region of Interest (ROI) for an image using the cvSetImageROI function in OpenCV, but the input parameters are invalid.
The assertion failed message suggests that one or more of the following conditions were not met:
- The width and height of the ROI rectangle must be non-negative.
- The top-left corner of the ROI rectangle (x,y) must be within the bounds of the input image.
- The bottom-right corner of the ROI rectangle (x+width,y+height) must also be within the bounds of the input image.
To fix this error, you should check your input parameters and make sure they meet these conditions before calling cvSetImageROI. For example, you can use functions like cvGetSize to get the size of your image and ensure that your ROI rectangle does not exceed those dimensions.
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