IR post processing

philio16

philio16

philio16

Associate
Joined
18 Oct 2002
Posts
158
Location
Manchester, UK
Hey guys, just bought an IR filter for just experimenting and playing with basically.....I was just wondering what kind of post processing everyone does? Various sites I've visited say it needs to be desaturated and it is good to swap various colour channels over but this still leaves a black and white image.

How are those IR images with colour achieved?

Any help would be greatly appreciated! :D

Ta!

edit - theres a sample image on my Dev art in my sig :)
 
Had a very quick go with your shot:

philio16_IR.jpg


Method:
- Reduced noise
- Used burn tool to reduce the effect of the hotspot
- New levels layer, used white eye-dropper to click on one of the brightest leaves (ie, what you want to be white)
- New Channel Mixer layer, set the red layer to be 100% blue and the blue layer to be 100% red (the so-called 'channel swap' of IR processing. Has the effect of turning the sky dark blue instead of brown)
- New Hue/Saturation layer - tweaked the saturation of cyan and blue up by 10 or so
- (Used spot healer on a couple of 'hot pixels' you seem to have on your sensor; eg, near top of conifer tree on left)

To make this process easier next time, I reccomend setting a custom white balance before taking the shot. Simply put on the filter and shoot a properly exposed frame of something that is entirely green (or whatever colour you want to appear as white). Then use that shot as you custom white balance. This kinda assumes your 300D has this function - not sure if it does or not!

Hope this helps :)

EDIT - I did have a link somewhere to a really good tutorial. Will have a search and post here if I find it
 
Thats awesome! Thanks for the info and tips :D

Edit - just took off the filter and shot at whiteness and them hot pixels aren't there..... :confused: compared normal/IR shots for positioning and they are definately not there...
 
Last edited:
Try shooting a long-ish frame with your lens cap on. They're generally more obvious against black. However, don't go too nuts over it, they're easy to clone out
 
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