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Digital Color Infrared Photography (IR) tutorial
- infrared photos
- whitebalancing ir-photos
- channelshifting (swap red and blue channel)
more ir-fotos can be found here: ./portfolio/INFRARED/
tutorial to create ir-composite photos: ./tutircomposite/
tutorial to modify the pentax for ir: ./tutirmodding/
used hardware
Pentax istDS Digital SLR
Hoya Infrared Filter IR092 (58mm)
Tripod
used software
CaptureOne Pro v3.7.2 www.phaseone.com RAW Converter
Photoshop CS2 www.adobe.com Image Processing Software
Xe847 Pro (PS-Plugin) www.xe847.com Color Correction Plugin
Neat Image Pro+ Edition www.neatimage.com Noise Reduction (and Sharping) Plugin/Standalone Software
image format
source format Pentax RAW 12bit
working format TIFF 16bit
target format JPEG 8bit
take the Infrared Picture
mount the camera on a tripod
the the image format to RAW to allow whitebalance correction in raw-software
mount the IR-filter
set the camera whitebalance by spotting to green grass
activate the autofocus because the AF can correct the ir-spectrum shift
set camera to manual exposure
set ISO 200 for min. noise
set f16 to f22 for max.deepness
set 10 to 30sec depending on light situation -> check the histogram
the camera internal whitebalance settings are limited. as a result of this the image is not neutral colored. we need to whitebalance the image in the raw-processing sotfware again. that's why you have to take the picture in RAW-format.
the unprocessed image should look like this
start PHASE ONE's CAPTURE ONE (www.phaseone.com)
select the raw format image
the unprocessed RAW image will look like this
change to the whitebalance-tab and select the trees or clouds as a reference point for the whitebalance
convert the raw format to 16bit TIFF
after whitebalancing the picture looks good but the sky has an unnatural brown color
start ABOBE's PHOTOSHOP CS2 (www.adobe.com)
load the generated 16bit TIFF file and correct the hot/stuck pixels with the cone-stamp tool
now select menu->image->adjustments->channel mixer...
set "output channel" to red
set "source channel - red" to 0%
set "source channel - blue" to 100%
for the next step you need to convert the 16bit image to 8bit: menu->image->mode->8bit
now open the plugin "Xe847Pro" to adjust the colors to a warmer tone.
the resulting image will look like this
long exposed infrared photos are always a little bit noisy and very unsharp
open the "Neatimage Pro"-Plugin in Photoshop or the "Neatimage" standalone application to correct the noiselevel
use Neatimage to sharp the image in one step with the noise reduction
save the image as a JPEG file
the resulting image
unprocessed image after whitebalancing after channelshifting
{hot link to this tutorial: http://www.xdeltax.com/tutinfrared/index.html}
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