VIPS is a free image processing system. It includes a range of
filters, arithmetic operations, colour processing, histograms,
and geometric transforms. It supports ten pixel formats, from 8-bit
unsigned int to 128-bit complex. As well as the usual JPEG, TIFF,
PNG and WebP images, it also supports scientific formats like FITS,
OpenEXR, Matlab, Analyze, PFM, Radiance, OpenSlide and DICOM (via
libMagick).
