Chameleon is an efficient tool for automatic adjustment of inserted objects to the target-image colour range, and the smoothing of an object’s border. It’s easy to use because it doesn’t require the precise selection of objects; simply make a selection, insert it into another image, click on Chameleon in Filters, and the object adapts to its new background.
The tool is useful for collage creation and for concealing unwanted artefacts by replacing them with nearby parts of an image. But best of all, it’s great for transposing one person’s features on those of another. This is a process that usually takes an inordinate amount of colour adjustment, but with Chameleon, playing the digital plastic surgeon is quick, easy and mightily entertaining. All that’s left for you to do is use Transform in Photoshop to size and position the transposed facial features, and then blend in the edges of the selection using the Eraser tool.