Scan conversion is the process of representing graphics objects as a collection of pixels, where graphics objects are continuous and pixels are discrete units that can be on or off. Algorithms for scan conversion allow graphics to be generated and displayed faster and more efficiently by converting vector images to raster images composed of pixels. One common scan conversion algorithm is the Digital Differential Analyzer (DDA) algorithm, which uses incremental steps to calculate the x and y coordinates of pixels along a line between two endpoints based on the line's slope and equation.