imagemagick 

Applies a Dragan-like effect to an image to enhance wrinkles creating a "gritty" effect.

Attempts to automatically remove pespective distortion from an image without the need to manually pick control points. This technique is limited and relies upon the ability to isolate the outline or boundary of... More information

Processses a scanned document of text to clean the text background and enhance the text.

Applies an embroidery effect to each color in an image. The image must have limited number of colors or only the top most frequent colors will be used. Each color will get the same pattern, but at different... More information

Processses a picture of a whiteboard with writing on it to clean up the background and correct the perspective. The four corners of the actual interior of the whiteboard in the picture must be supplied in order... More information

Transforms an image to place it in a region of a tshirt image. The transformed image will display hightlights from the tshirt image and be distorted to match the wrinkles in the tshirt image.

Automatically thresholds an image to binary (b/w) format using an adaptive spatial subdivision color reduction technique. This is the -colors IM operator as implemented with slight modification from Anthony's... More information

Creates a cartoon-like appearance to an image. The image is smoothed and then multiplied by a grayscale version of the image with the desired number of levels to produce the segmented appearance. The pattern... More information

Automatically trim a (nearly) uniform color border around an image. If the image is rotated, one can trim to the bounding box around the image area or alternately trim to the maximum central area that contains... More information

Crop and unrotate multiple images from a scanned image.

Unrotate a rotated image and trim the surrounding border.