Thank you very much for your help @Marco Thiel and @Mikael Forsgren, that's exactly where needed, greetings Luis
Alternatively, you can remove the background:
img = ExampleData[{"TestImage", "Lena"}]; ImageCompose[img, RemoveBackground[Rasterize[Style["UNSOLVED", "Title", Green, Bold, 80]], White]]
Cheers,
Marco
Hi Luis if youuse Graphics[] instead of rasterizing the text you should get you result you were aiming for:
im = ExampleData[{"TestImage", "Lena"}]; ImageCompose[im, Graphics[Text[Style["SOLVED", "Title", Green, Bold, 70]]]]
Hope this helps! /Mikael