Archive for April, 2012

Adding transparency with GIMP

By grigoris | Filed in Astronomy

Open your image with GIMP and: 1. Layer -> Transparency -> Add Alpha Channel 2. Select either by colour or selected area:     a. Select -> By Colour -> click on a colour (choose additional colours by holding down Shift and clicking again)     b. Tools -> Selection tools -> (appropriate tool) (shift-click to add […]