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Related file (external) types

The list of the available formats is the following:

  1. "IMG" Original format defined by the defunct software PCVision (from ImageAction), and widely used by MegaWave1. This format carries the comments field (cmt) of the memory object.
  2. "TIFF" Tag Image Format with one 8-bits plane (unsigned char gray levels). 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.
  3. "PGMA" PGM (portable graymap file format) in Ascii version.
  4. "PGMR" PGM (portable graymap file format) in Rawbits version.
  5. "PM_C" PM format with one 8-bits plane (unsigned char gray levels). This format carries the comments field (cmt) of the memory object. It has been developed by the University of Pennsylvania, USA.
  6. "GIF" GIF87 (Graphics Interchange Format) 8-bits per pixel, non interlaced. This format has been developed by CompuServe Incorporated.
  7. "BMP" Microsoft BMP 8-bits per pixel. Output objects are created using Windows BMP format. Compression methods are not implemented.
  8. "JFIF" JPEG/JFIF format with one 8-bits plane (unsigned char gray levels). 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 JFIF type. For example, JFIF:50 means JFIF file type with quality factor 50. Whatever the quality factor, output objects are created with loosely compression.
  9. "PS" PostScript (level 1) format, for output objects only. This format has been developed by Adobe Systems Incorporated.
  10. "EPSF" Encapsulated PostScript (level 1) format, for output objects only. Same as PS format but more suitable when used with some softwares that recognize encapsulated comments, such as LATEX.
  11. "INR" Original format defined by the software Inrimage (from INRIA). This is a very old version, implemented for backward-compatibility with MegaWave1, and it should not be used anymore.
  12. "MTI" Original format defined by the software MultImage (from 2AI), and used by MegaWave1. Quite exotic now.
  13. "BIN" This is the ``universal'' image format for 8-bits gray levels images. It records one byte per pixel, without header. Since it does not contain any header, the image file must be a square (i.e. the number of columns and the number of lines must be the same).


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