Making smaller Bitmaps from a Bitmap object [duplicate]
问题 This question already has answers here : How to crop an image using C#? (14 answers) Closed 5 months ago . I have a Bitmap object of a hand-written survey (see survey image below) which contains various checkboxes. I am using an algorithm to compare a Bitmap of a blank, unmarked checkbox against a Bitmap of the same checkbox (which may or may not be marked), in order to determine if the checkbox has been marked or not. Would it be possible to break the main survey Bitmap into smaller Bitmap