04-14-2021, 02:41 PM
[attachment=5863]
With the Color Picker Tool you can check this information while browsing with this tool over the image and check the data collected in the window of that tool.
Considering that you know the center of the circle where the region is more opaque, finding two points in the diameter of that circle where Alpha is equal to zero, you will be able to delimit a circle outside of which alpha will be 100% transparent.
[attachment=5863 Wrote:Mixxer pid='22987' dateline='1618405223']Ok, but I didn't use that workflow. I didn't use the Color to Alpha tool. I used the Levels tool. I saw no alpha info there. Is the Alpha reading available anywhere else on the GUI? Thanks.
With the Color Picker Tool you can check this information while browsing with this tool over the image and check the data collected in the window of that tool.
Considering that you know the center of the circle where the region is more opaque, finding two points in the diameter of that circle where Alpha is equal to zero, you will be able to delimit a circle outside of which alpha will be 100% transparent.