edited in Photoshop CS3
- auto levels
- curves: adjust red, green and blue channels
- selective color: adjust green
- duplicate layer, desurate, lower opacity, then merge
- selective color, again: adjust green
- vignette added in filter>distort>lens correction
- sharpen
Sorry if that was too blunt, I forgot to take note of my steps. No special effects or anything here; I just wanted to experiment to the colors.