There is a basic workflow that you should think about adopting for your IR photography. It is up to you how exactly you want your images to turn out (IR post processing is a very creative process that is highly subjective). I use the following workup:
1. White Balance = Take a photo of something green, grass is usually perfect as it fills the frame, with the IR filter on.
2. File format = Take all your IR images in the RAW format. This will make your post processing loads easier later.
3. Make sure you white balance is set to "Custom" and select "use image". Now use your photo of the green grass and start taking your pictures. You will know your exposure is roughly right when you can see that the leaves in your "red" pictures are faintly purple.
4. Bring your RAW files into Adobe LightRoom (or equivalent software). You will notice that the software automatically updates your images using your "custom" white balance setting and adjusts the colours. Now you need to set your white balance setting to "Tungsten".
5. Adjust your exposure, sharpness, etc. to your liking.
6. Export your images our of LightRoom and bring them into PhotoShop.
7. Add a new "Channel Mixer" layer with the following settings:
RED CHANNEL: Red = 0%, Geen = 0%, Blue = 100%
GREEN CHANNEL: Red = 16%, Green = 66%, Blue = 23%
BLUE CHANNEL: Red = 100%, Green = -30%, Blue = -12%
This is where your "artistic licence" comes into play. You can make the images look any way you like by playing with the variouis channels.
8. Add a new "Curves" layer with the following settings:
Under "options" select "Enhance Per Channel Contrast" and make sure the "Snap Neutral Midtones" box is checked.
9. Make any final adjustments you like and save the image. You may also want to run a noise reduction filter on your final image as some IR images can tend to get a little grainy. Anyway, when all this is done you should go from something like this:
BEFORE:
AFTER:
Hope this helps you mate!
