Photoshop

Faking Infrared

(1)channel mixer method
Make a copy of your background layer > use a channel mixer adjustment layer for this conversion with the following settings: red -50/ green 200/ blue -50 with Monochrome checked. If you have a lot of sky in your image you can also try: red 0/ green 200/ blue -100. You can also try red -70/ green +200/ blue -30 (It is important that you start with green +200 and leave it at that number) > go back to your background copy layer > click channels (next to the layer palette) and highlight the green channel > apply gaussian blur to that channel only: start with something around 5 pixels > click immediately after the last step > edit > fade filter with the following settings: 25% opacity; change the blending mode to screen.


(2)If you prefer to use a black and white adjustment layer:
Make first a copy of your background layer > add a black and white adjustment layer with the following settings: green +300/ cyans +150/ yellows +150/ red 0/ blues -40/ magentas +30 > go back to your background copy layer > click channels (next to the layer palette) and highlight the green channel > apply gaussian blur to that channel only: start with something around 5 pixels > click immediately after the last step > edit > fade filter with the following settings: 25% opacity; change the blending mode to screen.

With both methods you can at the end add some noise: filter > add noise> gaussian > click: monochrome > play around with the settings.