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Bitmaps (also called “raster”) are made up of pixels, while vector images are composed of mathematical formulas that consist of curves and points. As such, they can be resized at will without losing quality. Making a bitmap larger makes the pixels larger too and the result can be blurry and jagged. Photos are bitmap images, and so are file formats like bmp, jpg, and psd.

Vector images have crisp lines and can be resized as big as a house without losing any image quality. Vector images are created in programs like Adobe Illustrator, Macromedia Freehand and Corel Draw