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مشاهدة النسخة كاملة : Lighten area of a image



C# Programming
09-11-2009, 02:00 AM
I have a app which places a watermark (text) on an image and saves this back to a file.

What I would like to do is lighten a rectangle area behind the text so the text is clearer.

Can anyone point me to articles which would show how to lighten an area. I found many which show how to lighten/darken the image (bitmap) but noe for an area.