If I don't know the aspect ratio of an image, what is the most efficient method to set the selection aspect ratio to that of the image? The fastest I've found (not fast at all) is to look at the window title and enter the full image dimensions in the aspect ratio text box (e.g., 4752:3168
).
For reference, the Digikam image editor has this functionality as a simple drop box entry in the cropping tool: