This is a port of an X11 program called ImageMagick by John Cristy.
This is the 'mogrify' program part (..) of ImageMagick.

NAME
       mogrify - transform an image or sequence of images

SYNOPSIS
       mogrify [ options ...] file [ [ options ...] file ...]

DESCRIPTION
       mogrify transforms an image or a sequence of images.
       These transforms include image scaling, image rotation,
       color reduction, and others.  The transmogrified image
       overwrites the original image.

  ImageMagick utilities recognizes these image formats:

       Tag       Description
       ----------------------------------------------------
       AVS       AVS X image file
       BMP       Microsoft Windows bitmap image file
       CMYK      Raw cyan, magenta, yellow, and black bytes
       EPS       Adobe Encapsulated Postscript
       FAX       Group 3
       FITS      Flexible Image Transport System
       GIF       Compuserve Graphics image file
       GRAY      Raw gray bytes
       HDF       Hierarchical Data Format.
       JPEG      Joint Photographic Experts Group file interchange format
       MAP       colormap intensities and indices
       MATTE     Raw matte bytes
       MIFF      Magick image file format
       MPEG      Motion Picture Experts Group digital video
       MTV       MTV ray tracer image format
       PCD       Photo CD
       PCX       ZSoft IBM PC Paintbrush file
       PDF       Portable Document Format
       PICT      Apple Macintosh QuickDraw/PICT file
       PNG       Portable Network Graphics
       PNM       Portable bitmap
       PS        Adobe PostScript file
       PS2       Adobe PostScript Level II file
       RAD       Radiance image file
       RGB       Raw red, green, and blue bytes
       RLE       Utah Raster Toolkit
       SUN       SUN Raster image file format
       TGA       Truevision Targa image file
       TEXT      raw text file;  read only
       TIFF      Tagged Image File Format
       VICAR     Planetary File Format
       VID       Visual Image Directory
       VIFF      Khoros Visualization image file
       X         select image from X server screen
       XC        constant image of X server background color
       XBM       X11 bitmap
       XPM       X11 pixmap
       XWD       X11 window dump
       YUV       CCIR 601 4:1:1 file.
       YUV3      CCIR 601 4:1:1 files.

But the TIFF format has been removed to save 200k and keep the size below
1mb. If you desperately need it, let me know! But the same TIFF support is
available in xv (xv214.lha on aminet).

TP

 PERMSSN    UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                  514     891  57.7% -lh5- 5fd1 Jul 17  1995 imagemagick/amiga.readme
[generic]                  283     515  55.0% -lh5- 7d74 Jul 17  1995 imagemagick/amiga.readme.info
[generic]                  286     515  55.5% -lh5- a3f6 Jul 17  1995 imagemagick/ImageMagick.txt.info
[generic]                  283     515  55.0% -lh5- 0b63 Jul 17  1995 imagemagick/mogrify.txt.info
[generic]                  285     515  55.3% -lh5- c2b7 Jul 17  1995 imagemagick/Readme.info
[generic]                 1251    2311  54.1% -lh5- fca9 Jul 17  1995 imagemagick/WorthALook.readme
[generic]                  288     515  55.9% -lh5- 02e6 Jul 17  1995 imagemagick/WorthALook.readme.info
[generic]                 3353    8606  39.0% -lh5- e0a6 Jul  3  1995 imagemagick/ImageMagick.man
[generic]                 3477   10519  33.1% -lh5- c826 Jul  3  1995 imagemagick/ImageMagick.txt
[generic]               440819  931796  47.3% -lh5- 96e7 Jul 15  1995 imagemagick/mogrify
[generic]                 7072   20012  35.3% -lh5- cd09 Jul  3  1995 imagemagick/mogrify.man
[generic]                 7312   23682  30.9% -lh5- a3c8 Jul 17  1995 imagemagick/mogrify.txt
[generic]                 6500   16861  38.6% -lh5- 57bd Jul  3  1995 imagemagick/README
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total        13 files  471723 1017253  46.4%            Jul 18  1995