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25 lines
1.3 KiB
Plaintext
25 lines
1.3 KiB
Plaintext
Adapted from the README: the FBM collection provides a complete package for
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manipulating and converting images, including 24-bit RGB, 8-bit color, 8-bit
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grayscale, and 1-bit bitmaps. This is a partial list of the commands:
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fbclean Flip isolated pixels (clean image)
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fbconv Arbitrary convolutions
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fbedge Compute derivative image (edge detection)
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fbext Extract region, resize, change aspect ratio
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fbgamma Gamma correct grayscale or color image for display
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fbhalf Halftone grayscale image (Blue noise, Floyd-Steinberg, etc)
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fbhist Compute histogram
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fbmask Set region to gray value
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fbmedian Median filter 3x3 regions
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fbnorm Normalize image intensity / increase contrast
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fbquant Color quantization (24-bit to 8..256 colors) Mod. Heckbert
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fbrot Rotate 90, 180, or 270 degrees
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fbthin Thin 1-bit images
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fbsharp Sharpen (edge enhancement) by digital Laplacian
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idiff (and udiff) convert raw byte stream into byte difference
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pbmtitle Add a title to a PBM file
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The FBM utilities handle these image formats: native FBM, UseNet Facesaver, raw
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(e.g. Amiga Digiview), Targa, Sun rasterfile with 32 byte header, Aldus TIFF,
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Poskanzer PBM format for 1-bit files, CompuServe GIF, JPEG JFIF, Utah RLE, Amiga
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IFF (except HAM mode), PC PaintBrush PCX, and Bennet Yee's 1-bit Face files.
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Amiga HAM, Diablo graphics, and PostScript output is available.
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