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Understanding the Resolution of Digital Images The resolution expressed in dpi or ppi In embroidery, more the squares of a grid are smaller, a certain amount per unit of measure, and the more image details are fine. Example An embroidery pattern of 2.5 x 2.5 inches on a grid of 10 squares per inch and 40 squares per inch. It is also the case for a digital image. More pixels are smaller, a certain amount per unit of measure, and more image details are fine. The "resolution" of the image corresponds to the "density" of pixels when viewing or printing. It is expressed in terms of number of points (printing) or pixels (computer) on a given length (1 inch). It is noted as dpi (dots per inch) or ppi (pixels per inch). Thus, for two images displayed or printed the same size, the image at higher resolution will be better of "quality" because it provides finer details. Example A digital image of 2 x 3 inches at 30 dpi and 150 dpi. 2 Community Digitization Program of Prescott-Russell