NuGet Package Fred's ImageMagick Script Autotrim

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 no border pixels. The excess border does not have to completely surround the image. It may be only on one side. However, one must identify a coordinate within the border area for the algorithm to extract the base border color and also specify a fuzz value when the border color is not uniform.

For simple border trimming of a normally oriented image or the bounding box of a rotated image, you may err somewhat towards larger than optimal fuzz values. For images that contain rotated picture data, when you want to trim to the central area, you should choose the smallest fuzz value that is appropriate. For images that contain rotated picture data, an estimate of the rotation angle is needed for the algorithm to work. However, setting the rotation angle to zero will let the algorithm determine the rotation angle.

The resulting trim is usually pretty good for angles >= 5 degrees. If the result is off a little, you may use the left/right/top/bottom arguments to adjust the automatically determined trim region.

Info

Version: 2.2020.822.858
Author(s): Dirk Lemstra, Fred Weinhaus
Last Update: Saturday, August 22, 2020
.NET Fiddle: Create the first Fiddle
Project Url: https://github.com/dlemstra/FredsImageMagickScripts.NET
NuGet Url: https://www.nuget.org/packages/FredsImageMagickScripts.Autotrim


Install
Install-Package FredsImageMagickScripts.Autotrim
dotnet add package FredsImageMagickScripts.Autotrim
paket add FredsImageMagickScripts.Autotrim
FredsImageMagickScripts.Autotrim Download (Unzip the "nupkg" after downloading)



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