N NetPBM, GRAPHICS, Suite of graphic image format manipulation & conversion pgms H Enhanced portable bitmap toolkit. The PBMPLUS toolkit allowsH conversions between image files of different format. By means ofH using common intermediate formats, only 2 * N conversion filtersH are required to support N distinct formats, instead of the N**2H which would be required to convert directly between any one formatH and any other. The package also includes simple tools for$ manipulating portable bitmaps. D The package consists of four upwardly compatible sections: < pbm Supports monochrome bitmaps (1 bit per pixel). H pgm Supports grayscale images. Reads either PBM or PGM, formats and writes PGM format. H ppm Supports full-color images. Reads either PBM, PGM, or PPM) formats, writes PPM format. H pnm Supports content-independent manipulations on any of theH three formats listed above, as well as external formatsH having multiple types. Reads either PBM, PGM, or PPMH formats, and generally writes the same type as it readH (whenever a PNM tool makes an exception and ``promotes'' a< file to a higher format, it informs the user). P -------------------------------------------------------------------------------- & N E T P B M J Netpbm is based on the widely spread Pbmplus package (release: 10 Dec 91).I On top of that, a lot of improvements and additions have been made. After D the latest release of Pbmplus, a lot of additional filters have beenK circulating on the net. The aim of Netpbm was, to collect these and to turn H them into a package. This work has been performed by a group of program-K mers all over the world. If *you* have some code to add, please contact us, I and we will incorporate it. There is a mailing list for discussions about L Netpbm. You post a message to the list by writing to "netpbm@fysik4.kth.se".N If you want to be on the list, send a mail with the message "subscribe netpbm"F to "majordomo@fysik4.kth.se". If you want to report a bug, please sendB your report to netpbm@fysik4.kth.se, and to the author of Pbmplus, jef@netcom.com. F Please note, that this is not an official Pbmplus release. The code inG this release is merely a collection of code from various sources around D the world. Not all of the new code parts follow the high standard ofE programming of Pbmplus. We have tried to make the code portable to as I many systems as possible, but we haven't cleaned up all routines. We hope F that this release will help the many users of Pbmplus to upgrade theirD code all in one piece, instead of having to hunt down different codeE fragments at different sites around the world. We also hope, that our D effort will help the author of Pbmplus, Jef Poskanzer, to make a new official release soon. > The file Netpbm lists all new featues and functions in netpbm.
