This collection provides a complete package for manipulating and
converting color and black and whites images, including 24bit RGB, 8bit
mapped color, 8bit grayscale, and 1bit bitmapped images.

	clr2gray  Convert color to grayscale
	fbcat	  Copy image (used for format conversion)
	fbclean	  Flip isolated pixels (clean image)
	fbconv	  Arbitrary convolutions
	fbedge	  Compute derivative image (edge detection)
	fbext	  Extract region, resize, change aspect ratio
	fbgamma	  Gamma correct grayscale or color image for display
	fbhalf	  Halftone grayscale image (Blue noise, Floyd-Steinberg, etc)
	fbham	  Convert FBM 24bit RGB to Amiga HAM mode
	fbhist	  Compute histogram
	fbinfo	  Dump image header
	fbm2pod	  Convert grayscale image to Diablo graphics (!)
	fbm2tga	  Convert image to Targa format
	fbm2tiff  Convert FBM files to 1, 2, 4, 8, or 24 bit TIFF
	fbmask	  Set region to gray value
	fbmedian  Median filter 3x3 regios
	fbnorm	  Normalize image intensity / increase contrast
	fbpalet	  Replace an imager's colormap with another, remove duplicates
	fbps	  Convert to PostScript
	fbquant	  Color quantization (24 bit to 8..256 colors) Mod. Heckbert
	fbrot	  Rotate 90, 180, or 270 degrees
	fbthin	  Thin 1bit images
	fbsample  Sample a 1bit file to produce an 8bit file
	fbsharp	  Sharpen (edge enhancement) by digital Laplacian
	gray2clr  Add a "gray" colormap to a grayscale image
	idiff	  (and udiff) convert raw byte stream into byte difference
	pbm2ps	  Convert PBM file to PostScript
	pbmtitle  Add a title to a PBM file
	raw2fbm	  Convert raw file to FBM format (eg: Amiga Digiview files)
	tga2fbm   Convert Targa file to FBM format
	tiff2fbm  Convert tiff file to FBM format
	uunet2fbm Convert UseNet Facesaver file to FBM format

File Formats

	FBM   (-F)	FBM file with 256 byte header (with title & credits)
	Sun   (-S)	Sun rasterfile with 32 byte header
	Tiff  (-T)	Aldus TIFF
	PBM   (-P)	Poskanzer format for 1bit files
	GIF   (-G)	CompuServe GIF format
	JPG   (-J)	JPEG JFIF format (cf The Independent JPEG Group)
	RLE   (-R)	Utah RLE format
	IFF   (-I)	Amiga IFF files (except HAM mode files)
	PCX   (-Z)	PC PaintBrush format for IBM
	Face  (-B)	Bennet Yee's 1bit files, used at CMU
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From the README file