input resolution

Definition: Measure of ability of input device e.g. scanner, digital camera to distinguish detail: the upper limit is determined by number of pixels available, the pixel size and their density and/or resolution of the driver stepper-motor in the case of a scanner. * However, input resolution may be lower for a variety of reasons including poor focus of optics, mechanical jitter in driver mechanism, off-axis illumination (e.g. flare), low system contrast. * Unit: ppi (points per inch) or ppcm (points per centimetre)

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