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Color to Alpha : in depth

Mar 9, 2012, 23:24 (This post was last modified: Mar 9, 2012 23:26 by Pl3th0r4x.)
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Photo Color to Alpha : in depth
I don't understand how you can know which colors to use when applying "Alpha to Color".

Here are a few images I have and what I've done so far:

Here are my original images
[Image: eye.jpg]

[Image: dicealien-2.jpg]

Here are the first edits:
[Image: eye1.png]

[Image: dicealien-1.png]
What I have done is used the Fuzzyselect fuzzy select tool and removed the background. Then select/grow(2px)/alpha to color white
The image of the eye on top looks good I want to know why the bottom does not follow. Obviosly the color is different.

[Image: eye2.png]

This image I used the Bycolorselect by color select tool > as I found in this page here. I then grow(2px)/alpha to color white.

This one looks ok, but the alien looks about the same as the other method. Also this one is looking funky and missing some erased white / jagged edges, and etc.

How is it that this color to alpha is used properly, by guessing? Please help explain in as simple novice terms if possible. thanksBlush

[Image: banana.gif]
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