The amount of data we capture in each digital picture and the way we choose to store that information has a massive impact on what can be done with the image later on. The concepts of resolution and compression are ones we need to become familiar
In most situations bigger is better, and so it is on the surface with digital photography. What has become known as ‘resolution’ concerns how many pixels a camera uses to capture a picture – generally, the more pixels the better the quality of the
finished result. A camera that has a seven million pixel sensor should produce images of a higher standard than a camera with just two million pixels.
If you think of a digital image as one created using coloured building blocks of an equal size you will be able to see that having a greater number of blocks will allow you to construct a more detailed picture.