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Related file (external) types

The list of the available formats is the following:

  1. "TIFFC" Tag Image Format with three 8-bits color planes (24 bits color). This format carries the comments field (cmt) of the memory object. It has been developed by Sam Leffler and Silicon Graphics, Inc. To use this format, you need the TIFF library (libtiff). See the Volume One, section ``Installation''. Output objects are created without compression.
  2. "PMC_C" PM format with three 8-bits planes (24 bits color). This format carries the comments field (cmt) of the memory object. It has been developed by the University of Pennsylvania, USA.
  3. "BMPC" Microsoft BMP 24-bits per pixel. Output objects are created using Windows BMP format. Compression methods are not implemented.
  4. "PPM" Portable pixmap format (24 bits color). Only the "raw" PPM format is supported, the "plain" (ascii) one being definitely too wasteful of space to record color images.
  5. "JFIFC" JPEG/JFIF format with three 8-bits planes (24 bits color). This format carries the comments field (cmt) of the memory object. It has been developed by the Independent JPEG Group's software. To use this format, you need the JPEG library (libjpeg). See the Volume One, section ``Installation''. The compression ratio is defined by the quality factor, which is an integer between 1 (worse) and 100 (best). Default quality factor is 100. To change this value, add it as an option to the JFIFC type. For example, JFIFC:50 means JFIFC file type with quality factor 50. Whatever the quality factor, output objects are created with loosely compression.


next up previous contents index
Next: Functions Summary Up: Color Char Images Previous: The structure Ccimage   Contents   Index
mw 2004-05-05