SlackBuildsOrg/graphics/gimp-plugin-bimp

gimp-plugin-bimp (Batch Image Manipulation Plugin for GIMP)

With BIMP you can apply a set of GIMP manipulations on groups of
images. It provides an easy to use interface and a lot of batch functions:

Resize, Crop, Flip and rotate, Blurring and sharpening, Color (and curve)
correction, Watermark, Rename, Change compression and format, ... and
whatever you want! (almost)