Changing BMP Pixel Value

[mbro]

Hi,

I'd like to write a program to read a BMP and change all of the colours that are almost black to be black R:0 G:1 B:0 to R:0 G:0 B:0.

I have a binary method for reading in and checking pixel values but no of no way of reading the image in and writing it.

Would someone be able to help me? Possibly with code as well?

Thanks,
Mike

 

[strongm]

Ypu might want to look at my code in thread222-950076, which illustrates a technique that doesn't require you to examine the pixels yourself and works at around about blitting speeds.

 

[strongm]

(note: a slightly more recent version of the type library that I use that is referenced in the threads is available here

http://www.cyberactivex.com/download/GDI+TLB.zip;

this will really only make much difference if you start trying to use streams)