Re: Image background

On 10/17/2024 3:35 PM, Rich wrote:

saito <saitology9@gmail.com> wrote:

I wonder if it is possible to remove the background from an image and
make it transparent using Tk or a package? Then I can save it as a png
image. The background in my case consists of a single color. Perhaps I
could replace that color with an "alpha" color but how?

 man n photo:
     imageName transparency subcommand ?arg arg ...?
       Allows examination and manipulation of the transparency
       information in the photo image.  Several subcommands are
       available:
 

Thank you - I missed this page.  Does this command apply to non-png images? Initially the image will have no transparency, since the background is a solid, opaque color?
The challenge in my case is I don't know where the background starts and what color it would be. The latter can be solved by involving the user perhaps.