What Is an Alpha Channel? How Can This Be Useful In Your Coursework Project?

DEFINITION:
Alpha Channel: In computer graphics, alpha compositing is the process of combining an image with a background to create the appearance of partial transparency. It is often useful to render image elements in separate passes, and then combine the resulting multiple 2D images into a single, final image in a process called compositing. For example, compositing is used extensively when combining computer rendered image elements with live footage.

This will be useful in my future coursework as, one of the aspects of the coursework is to create a new method of transport for Derry. I will have to produce photographic evidence of what the system will look like in Derry. This is managable through the utilisation of a computer programme called " The GIMP". This programme will create an alpha channel for a jpeg photo so it can be adapted onto a backround picture of Derry.

LINK: http://en.wikipedia.org/wiki/Alpha_channel

IN MY OWN WORDS:
Alpha composing is combining different parts of pictures with one another to produce a form of transparency. It is used to combine a computer image with a piece of live footage.