Thanks to all
Interesting...I would have thought that with a bitmap composed of pixels, each pixel would have a specific color assigned to it, and the "color to alpha" function would affect pixels having only the exact color specified (in this case h1cf905) .
As an aside, while I was playing around with this I converted a black and white image to a RGB format and then went through the proceedure as outlined in my original post, and the "color to alpha" function caused a violet shift in that image as well. Making me wonder where the spurious h1cf905 could have possibly come from in an image that was originally black and white.
Anyway, thanks for the pointers, the suggestion to work within selected areas sounds like good advice, although it will be challenging to employ on targets having an irregular outline.
For whatever reason I seem to find it easier (albeit time consuming) to paint a border around a target image than to try and draw a selection boundry around it. And the "auto" gizmos are not discreet enough
Boy this "auto append" function at this board where subsequent replys are just squeezed into your proceeding replies.... sure is annoying
(02-02-2019, 05:00 AM)Blighty Wrote: Yes, that is the way "color to alpha" works. Use one of the selection tools to select an area, then use "color to alpha" on that area. The parts of the image outside of the selected area are not affected.
Interesting...I would have thought that with a bitmap composed of pixels, each pixel would have a specific color assigned to it, and the "color to alpha" function would affect pixels having only the exact color specified (in this case h1cf905) .
As an aside, while I was playing around with this I converted a black and white image to a RGB format and then went through the proceedure as outlined in my original post, and the "color to alpha" function caused a violet shift in that image as well. Making me wonder where the spurious h1cf905 could have possibly come from in an image that was originally black and white.
Anyway, thanks for the pointers, the suggestion to work within selected areas sounds like good advice, although it will be challenging to employ on targets having an irregular outline.
For whatever reason I seem to find it easier (albeit time consuming) to paint a border around a target image than to try and draw a selection boundry around it. And the "auto" gizmos are not discreet enough
Boy this "auto append" function at this board where subsequent replys are just squeezed into your proceeding replies.... sure is annoying