On Fri, 13 Apr 2001 16:06:22 +0100, David Kirkby <drkirkby@xxxxxxxxxxxx> said: >Hi, I'm trying to do something with Gimp that is perhaps a little >unusual. This is causing me a problem, but I'd like to know if it >can be overcome easily. I'm using Gimp 1.2.0 on a Sun SPARCstation >with Solaris 8. >I would like to create a bitmap (.BMP) with Gimp that can be read by >a scientific application I have written. This application looks for >specific colours such as red (0xff0000), black (0x000000), white >(0xffffff) and green (0x0x00ff00). >I need to create an image that uses these colours and *only* these >colours. However, when I draw a red circle using pure red, on a pure >white background, the edges of the circle are pink, containing some >red, and equal amounts of green and blue. >Likewise if I create a small bitmap (say 5 x 5 pixels) and set these >pixels to the values I want, expanding the image in Gimp creates >pixels of intermediate colours. >I appreciate this is more aesthetically pleasing, but Gimp's >interpolating colours is causing me a problem. Is there any obvious >way to stop colour interpolation ? Use indexed mode. Kelly
