Term: REFLECTANCE
The amount of light of a specified wavelength or range of wavelengths that is reflected from a substrate, ink or other means to create the dark bars and light spaces of a barcode symbol and the printed characters and background of OCR data. The relative brightness of an illuminated paper surface as seen by the human eye. The eye modifies the apparent brightness at different wavelengths according to its response to the human-visible spectrum. Equipment that measures reflectance requires a filter that matches its response to that of the human eye.
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