Legacy ImageMagick Discussions Archive

As of ImageMagick 7.0.8-31 and 6.9.10-31, has new functionality to aggressively trim away the background from an image. Rows and columns will be removed iteratively from the outside until each remaining ones contain only a specified percentage of background color.

The new functionality is controlled by a define. The define is

where n is the percentage of background pixels permitted in the outer rows and columns of the image. That is, rows and columns of the image will be removed from the outside of the image until each row or column contains no more than n% background color pixels.

To remove all outer rows or columns with background color pixels, use

Note, the trim option is responsive to the fuzz setting.

Here are some examples.



This command removes all black background

This command removes all rows and columns until only 50% background remains in each.

Here is another example trimming until 0% background.





These last two example show what happens with too large a fuzz value

Here is another interesting example -- see my Imagemagick solution for trimming and appending fisheye stereo pairs side-by-side at https://stackoverflow.com/questions/583 ... tereo-rect

Note a new argument for the aggressive -trim has been added in IM 6.9.10.69 beta and IM 7.0.8.69 beta: -define trim:background-color=<color> to ensure it only trims a particular color.