The input file format is BMP. The required output format is BMP. I do not want a reduction of size or quality, but I want to reduce the file size. How is it possible?

  • Out of curiosity: What purpose requires you to use BMP?
    – Wrzlprmft
    Aug 1 '15 at 7:42
  • What kind of color depths are we talking here?
    – joojaa
    Aug 1 '15 at 10:23
  • It is a valid question. 24 bit BMP on Windows, as far as I know, do NOT accept compression.
    – Rafael
    Aug 1 '15 at 19:20
  • Some aplications needs a bmp file as source images before compiling them. For example one client needed them for a touch screen for a control pannel on an odonthological laser. This BMP files are compressed when compiled.
    – Rafael
    Aug 1 '15 at 20:38
  1. Use file compression tools - like zipping or adding to rar.
  2. Reduce 24 bits to lower. But that'd be lossy.

So, you don't really have a way afaik.

  • According to Wikipedia, BMP supports some compression, though I do not know whether any programs actually support it. But then I am not using BMP anyway.
    – Wrzlprmft
    Aug 1 '15 at 8:06
  • Acoording to that quote the one that accepts compression on 24 bits is the OS2 operating sistem, that was from IBM long ago extint.
    – Rafael
    Aug 1 '15 at 19:19

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