ABSTRACT
Digital photographic images are constructed of pixels and as such are resolution-dependent. You can therefore only scale the finite pixel image information so far, before the underlying pixel structure becomes apparent. By contrast, vector objects, created in programs like Adobe Illustrator, are defined mathematically. So, if you draw a rectangle, the proportions of the rectangle edges, the relative placement on the page and fill color can all be described using a mathematical description. An object that’s defined using vectors can therefore be output at any resolution and it does not matter if the image is shown on a computer display, a postage stamp or as a huge poster, it will always be rendered with the same amount of detail (see Figure 4.1).
