Understanding each image type
When looking at the different types of digital images, it becomes apparent that there is a lot more to understanding them. Each has different characteristics and capabilities, which when well understood can add a new depth to their usage. This section covers those features.
Photo
A photo is a two-dimensional representation of anything—also referred to as a digital image. A photo can be taken with a digital camera or it can be scanned in. It is composed of pixels, where each pixel represents information, typically a color. The more pixels that are able to be compacted together, the higher the resolution of the display. The iPhone 4 introduced a display format, where the pixel format is so tightly compacted that the human eye cannot discern the pixels, making it appear as true color (which represents all the colors the human eye can see). The goal is to produce displays that are true colors.
Displaying pixels on a computer screen is a completely different process...
