   Converting a colored to grayscale
  I am programming a small game for my computer science course and I was wondering if either Direct X or Windows GDI has a function that will let me convert a colored image to a grayscale image.  
  Sorry about the 2 posts. I hit the double click button on my mouse.  ;  Um... I only saw one post. Yet, I hope double clicking doesn''t post two... (Tooko runs from current thread and returns to last post) Well, that was exausting.I wonder why I scare so many people away...    The past was unknown, the future was predicted.  ;  Why would you need a GDI function to do it? Just calculate the luminance of the pixels. Thats all a greyscale image is.( Luminance = (R+G+B)/3 )    Death of one is a tragedy, death of a million is just a statistic. ;quote:Original post by python_regious  ( Luminance = (R+G+B)/3 ) I remember that you need different factors (that together summs to 1.0) for R and G and B, because one is more intense than other. But I cant remember those factors.  ;  Googled "rgb to luminance":luminance = 0.3*red + 0.59*green + 0.11*blue;  ;quote:luminance = 0.3*red + 0.59*green + 0.11*blue;  A long time ago, I made a test image with three regions exactly red, blue and green, and I used Photoshop to convert it to grayscale. From that test, I got the same formula, and it seems to work pretty well.There is something else you should be careful with: Gamma correction. If you start mixing values and in the end you just send them to your VGA, your medium-intensity colors are going to be too dark.  