Image taken Wednesday, November 30, 2011. Posted Tuesday, November 29, 2011
Category: Project365
License: CC-BY-NC-SA (What does this mean?)

Tags:

Location:

Spring Hill, Brisbane
General location: Australia, South-East Queensland

The Setup:

After reading up some more on how to achieve the false colour effect, the consensus is to take a shot of some foliage, then set the custom white balance using that shot, then continue on.

The camera & lens:

Filters: Near-infrared (580nm)

Post processing:

The GIMP -

  1. Run colour -> levels -> auto-levels (as per all the tutorials)
Lightroom -
  1. Re-import from GIMP
  2. Curves: Darks -5, shadows -80
  3. Colours: Luminance red +100, green +100
  4. Noise reduction: Luminance +50
  5. Crop out some purple banding on the right-hand side.
  6. Spot adjustment to de-emphasise the flare spot in the centre of the screen (this could be done better...

The wash-up:

I don't think I like the particular colour tone, but still need more practice with getting the colour that I do want.

What would you do?

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5 Responses to “Project365 [333/365]: Infrared Tree”

  1. Michael Carroll

    Ok that's really cool. I remember reading all about the NASA probe cameras (not sure if they use CCDs or what) but they run individual colour filters and take multiple photos and then play with all sorts of levels and filters to get it back to what it might look to a human. From what I understand humans don't see the the same spectral range as CCDs do.

    Also, does this filter let you see through clothes like the old Sony handicams did?

    Reply
  2. Sheridan Tighe

    I could understand taking many pictures and combining then back, for space shots as the invisible wavelengths are just as important to them as the visible.

    I know the CMOS/CCD censors are sensitive to more light than we can see, so they have a filter at front of sensor to only let through visible light. Then when I put this R72 filter on that blocks out visible light, not very much gets through; so maybe it could see through clothes but the subject would have to stand still for 30 seconds for it to work, at least with my camera.

    Reply
  3. Michael Carroll

    If you point an IR device (like remote) at a CCD is that visible on screen? CMOS phone cameras do, but I'm guessing they don't have particularly good filters (and apparently glass filters IR pretty well, so a SLR would probably block a lot more that way).

    Reply

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