On 15/07/2009, at 8:28 AM, D Marcotte wrote:
>
> You can download one or more of the 3 images here:
>
> <http://www.bydawnlight.com/shared/False%20Colour%20IR/>
>

I hope you don't mind, but I've processed these and put up a temporary
gallery at
http://khromagery.com.au/samples/marcotte1


Jim mentioned the RAW files were B&W: yes a B&W picture style had been
used so the JPEG preview embedded in the supplied files was B&W. But
when the RAW data still has colour information.


To set a custom WB in-camera on your 450D, take a photo of some sunlit
grass and use the Custom WB function in the menus to use that to
define the WB. The images on the LCD will no longer appear red (of
course, don't combine this with the B&W Picture Style).

However, when you get the images into Adobe Camera Raw the WB setting
will be outside the range allowed by the software, and the colours
won't appear the same as on the camera's LCD. In that web gallery
I've presented 4 versions of each image:

1.
Using the standard profile, with the best WB setting possible (using
the eye-dropper tool, I clicked on some sunlit grass). There's still
a strong tint to the images, but if you take this into Photoshop and
run various Auto Color and Red/Blue-swap functions you can easily get
strong colours out of it. This is what the Khromagery FalseColour
action does.

2.
This is the above image after processing with the FalseColour action
(with the default Hue adjustment).

3.
Using a custom DNG profile, this is how strong the colours can be "out
of the box". These images can then be processed further in Photoshop
if you wish.
Incidentally, I started to make a custom DNG profile for each filter,
but they were very similar, and I ended up using the same custom
profile for every image. They do need different WB settings though.

4.
The same DNG profile, but instead of setting custom WB off the grass,
I instead chose things like the sky.


Do these examples help? Your first challenge is to learn how to set
custom white balances both in the camera and in your RAW processor.
Your next challenge may be to get a custom DNG profile set up to
further improve things.


By the way, you have some dust on your sensor!

__
David