TImage32.Grayscale

procedure Grayscale;


Grayscale only changes color channels. The alpha channel remains untouched.

  uses Image32, Image32_PNG;
  ...
  img := TImage32.Create;
  img.LoadFromFile('lenna.png');
  img.Grayscale;
  img.SaveToFile('lenna_gray.png');
  img.Free;
      
Before:
After:

See Also

SetRGB