Creating Anaglyphs with PHP
I created some stereographic pairs yesterday and used some online software to create an anaglyph for viewers with red and cyan glasses. Creating anaglyphs is in fact a really easy task. All that has to be done is to separate the red layer from the left image and the green and blue layers from the right image. Finally the three layers are combined to create a colour anaglyph. Simple.
Having a little experience with PHP, I decided to create a simple script to create anaglyphs. First I needed to plan out how the script was going to work. The GD library has no native image filters except in PHP5. My plan works like so.
