Various computer scripts in various languages.
This small GIMP scheme script is meant for postprocessing photos that were taken with either a digital camera without an IR-cut filter or with an IR-passthrough filter.
For images that were taken without IR-cut filter, it largely removes the red/pink tint and restores a more natural color balance - execpt for areas which mainly refelct IR light, such as plants.
For images that were taken with an IR-passthrough filter, it currently does only switch red and blue channels. More is going to came for that later.