How is a sepia tone created?

Question

What are the basic operations needed to create a sepia tone? My reference point is the perl imagemagick library, so I can easily use any basic operation. I\'ve tried to quan

Answer 1

Take a look at how it's implemented in the AForge.NET library, the C# code is here.

The basics seem to be

• transform it to the YIQ color space
• modify it
• transform back to RGB

The full alrogithm is in the source code, plus the RGB -> YIQ and YIQ -> RGB transformations are explained.