Is it possible to magnify an image when utilizing selectRoi?

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Yes, it is possible to magnify an image when utilizing selectRoi. One way to do this is to crop the selected region of interest (ROI) from the original image and then resize the cropped image to a larger size using image processing functions like cv2.resize() in OpenCV. Another way is to adjust the zoom level or scale of the image display window to magnify the selected ROI.