Ergebnis der Suchanfrage

• Forum: Multimedia

  AW: weniger Scanline aufrufe ... Graustufenbild

   
    by Kas Ob., 18. Feb 2024
  That what i meant.
• Forum: Multimedia

  AW: weniger Scanline aufrufe ... Graustufenbild

   
    by Kas Ob., 13. Feb 2024
  @Michael II, Nice ! this is the right way, by changing the operation from read and write in two different places stressing the CPU cache, do it once in sequential and fast move after that perform the the local operation in one place, CPU can perform 2-3 reads and one write per cycle, but let be real, if Delphi compiler managed to spit code that perform one read in 3 cycle i consider this is a...
• Forum: Multimedia

  AW: weniger Scanline aufrufe ... Graustufenbild

   
    by Kas Ob., 11. Feb 2024
  That makes sense, thank you for the links.
• Forum: Multimedia

  AW: weniger Scanline aufrufe ... Graustufenbild

   
    by Kas Ob., 11. Feb 2024
  Found a resource might be helpful at last.
  
  https://stackoverflow.com/questions/8554448/convert-8-bit-color-bmp-image-to-8-bit-grayscale-bmp
  
  From the first answer, though the question and the code is to make a gray scale 8bit bitmap from colored
  var entry = bmp.Palette.Entries;
  var gray = (int)(0.30 * entry.R + 0.59 * entry.G + 0.11 * entry.B);
  ...
• Forum: Multimedia

  AW: weniger Scanline aufrufe ... Graustufenbild

   
    by Kas Ob., 11. Feb 2024
  Hi,
  
  First you need to define 16bit and 8bit bit per pixel format, because there is many !
  
  8bit and 16bit are so old when different systems had different color space, example : 8bit pixel either colored or gray, in colored case is it 332 or 233 for RGB or BGR ...
  Same goes for 16bit, is there Alpha, in case of alpha then mostly it is 5551 or 1555 if not then 555 or 565, is it BGR(A) or...