PNM file format
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The Portable aNy Map (PNM) file format is a collection of file formats that includes the variants Portable Pix Map / Portable Grey Map.PNM files (the raw versions) are good, simple, and useful file formats for color, grey scale, and binary images. epcEdit supports the PPM format (the color version of PNM) and the PGM format (the grey-scale version of PNM).Also known as: Portable Bitmap Utilities, pbmplus.
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