Absolute Difference

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Marpel
Posts: 587
Joined: September 13th, 2009, 3:19 pm
What is the make/model of your primary camera?: Nikon D810
Location: Port Coquitlam, British Columbia

Absolute Difference

Post by Marpel »

I'm wondering what the colors represent in this blend mode (in Composite).

I ran an image through Color Balance and could see no appreciable difference when visually comparing the before and after, nor did the histogram seem to change.

However, when I ran the two images through Composite, with Absolute Difference, initially the result was black (visually), but when I expanded the result in Levels and Color, that result was visible, as if the original image had a bright red filter placed over it, which I have never seen before. When I have done similar operations before, the colors are mixed and not solid like this one, so just wondering what the colors actually represent.

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jsachs
Posts: 3466
Joined: January 22nd, 2009, 11:03 pm

Re: Absolute Difference

Post by jsachs »

It means one image is slightly redder than the other.

If one image is brighter than the other you will see all the colors.
Jonathan Sachs
Digital Light & Color
Marpel
Posts: 587
Joined: September 13th, 2009, 3:19 pm
What is the make/model of your primary camera?: Nikon D810
Location: Port Coquitlam, British Columbia

Re: Absolute Difference

Post by Marpel »

Thanks for the explanation.
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