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DPChallenge Forums >> Individual Photograph Discussion >> IR/PS this pic
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09/04/2005 06:31:13 PM · #1
Took my new IR lens and tripod out on a date today. I have no clue if I'm doing it right. Not sure what an IR picture is suppose to look like straight out of the camera nor do I know how to process it. Here is an example of one of my shots. I have around sixty if this one is not salvageable. Please pay no attention to the composition either. Thank you.' . substr('//images.dpchallenge.com/images_portfolio/33068/thumb/226856.jpg', strrpos('//images.dpchallenge.com/images_portfolio/33068/thumb/226856.jpg', '/') + 1) . '
09/04/2005 08:00:57 PM · #2
This is how most come out of the camera. Check out Marbo's portfolio. He has some of the best. Try swapping your red and blue channels and just play around with it and you may be amazed by what you'll find!
09/04/2005 08:21:37 PM · #3
Here's my quick 5 minute attempt. There was a lot of noise so I had to apply a lot of neat image so you lost a bit of detail. The steps are listed with the photograph.
Good luck.
-Laura

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P.S. I second the suggestion of checking out marbo's portfolio. His pictures are fantastic.
09/04/2005 09:20:56 PM · #4
Right, i've not worked much with IR before but here's my attempt anyway:
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Simple histogram adjustment to make it fill the full range, then adjusted hue and saturation to a more "typical IR shot" ink blue, and added a slight directional sharpen to bring out detail on the railings.

Tried not to lose detail by neat imaging, but dunno if this came out better or not in retrospect.

Message edited by author 2005-09-04 21:22:31.
09/05/2005 01:35:14 AM · #5
It appears that most of my shots have a lot of noise. What can I do to prevent this when using an IR lens?

Liked your post processing Laura.
09/05/2005 02:11:42 AM · #6
IR is noisy. Always has been. It's only using part of the liught spectrum, so it pretty much has to be. You knwo how when youy use hue/sat and you bump one channel too far, it gets noisy? That's sort of what's happening...

Robt.
09/05/2005 05:53:54 PM · #7
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09/05/2005 07:33:08 PM · #8
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I am not familiar with your camera Alicia. With mine I have to open the image with Nikon Capture first and export it to PS. PS does a terrible job with the color profile and I get pink images regardless of how I set the white balance.

Message edited by author 2005-09-05 19:44:38.
09/05/2005 07:53:19 PM · #9
Correct me if I'm wrong but couldn't you take that picture with a normal old lens and modify it afterwards to look like that? If you must post-process it anyways and it's usually grainy, it seems to be a waste. It doesn't appear to be real infared, it seems as the light is showing up the same way it would if it were to be taken with a normal lens, so couldn't you just take it with a normal lens and post process it to look like infared?
09/05/2005 08:06:52 PM · #10
Originally posted by Atropos:

Correct me if I'm wrong but couldn't you take that picture with a normal old lens and modify it afterwards to look like that? If you must post-process it anyways and it's usually grainy, it seems to be a waste. It doesn't appear to be real infared, it seems as the light is showing up the same way it would if it were to be taken with a normal lens, so couldn't you just take it with a normal lens and post process it to look like infared?


Yes and No. There are PS actions that imitate IR. And if you use a IR 92 filter the image is basically black and white because only the reflected IR light is captured. However, a 72 IR filter will capture the highest end of visable light also. The key is reflected light. Different subjects reflect IR light differently. But you need bright light. I have not seen this imitated accurately in PS.

Like K-M S said, Marbohas some excellent examples.

Message edited by author 2005-09-05 20:07:44.
09/05/2005 08:29:05 PM · #11
Hey Eric,

What does Nikon Capture do? I've attached a couple more pics that I took on the same day. Do you think my exposure is wrong? I really don't know where to go from here. Thank you.

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09/05/2005 08:46:46 PM · #12
Originally posted by pearlseyes:

Hey Eric,

What does Nikon Capture do? I've attached a couple more pics that I took on the same day. Do you think my exposure is wrong? I really don't know where to go from here. Thank you.

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PS uses a generic color profile for all their RAW conversions even though each camera (brand)is different. So by importing the image from Capture I get the correct color. If you are not shooting in RAW then I would suggest changing your white balance. If your camera is able to set a custom WB set it by shooting at sun lit grass at F8 for 1 sec. If this is not possible with your camera, in PS go to levels and set the white point at the brightest spot in your image. This will remove most of the pink tint. Then you can either desturate' . substr('//images.dpchallenge.com/images_portfolio/15002/thumb/227564.jpg', strrpos('//images.dpchallenge.com/images_portfolio/15002/thumb/227564.jpg', '/') + 1) . 'or change the hue' . substr('//images.dpchallenge.com/images_portfolio/15002/thumb/227565.jpg', strrpos('//images.dpchallenge.com/images_portfolio/15002/thumb/227565.jpg', '/') + 1) . '
09/05/2005 08:55:25 PM · #13
I just have a point and shoot camera but I can adjust my white balance. Thank you for the tip. I'll go try it out tomorrow.

Thanks for your help.
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