image one, let's say the bright gray background represents the bright core
of a nearby spiral galaxy, located far from our galactic plane.
In this position, our view is basically unobstructed and there is
virtually no color shift.
A shows what happens to the white light when the galactic
extinction for IC 342 is added. The most changed, blue light, is reduced
to 16% of its original value. The RGB values are reduced to 65, 48 and
Example B shows the result from typical
image processing. With PhotoShop, the gray background was used for
the luminance and example A for the color layer.
Curiously, the brightness was generally increased
with the value for the red channel at 213. However, this generally shows
how galactic extinction can add a red shift our images.