Photoshop offers many different techniques to remove an unwanted background from an image. For simple backgrounds, using the standard Magic Wand tool to select and delete the background may well be more than adequate. For more complicated backgrounds, you might use the Background Eraser tool. This tool samples the colour at the centre of the brush and then deletes pixels of a similar colour as you “paint.” It feels like painting with acid.
99designs offers a step-by-step guide on how it works. Just click on the link below:
