l
Documents with characters on a patterned background
Example: Characters overlapping illustrations and diagrams
l
Documents with characters printed in various directions such as drawings
l
Documents written using only capital letters
l
Documents including handwritten characters
l
Skewed documents
l
Documents with complex layouts
l
Documents with a large amount of image noise
l
Documents with faint characters
l
Documents with faded characters
Rotating a Scanned Image to Its Correct Orientation
59