In this book, sampling rate means the optical sample rate changed by interpolation or subsampling. Also called ppi rate. See also optical sampling rate. Saturation A measure of purity of color. Saturated colors contain pure color only, colors desaturate to gray.
Saturation is a measure of the degree of pureness or movement away from gray.
To enlarge or reduce an image by increasing or decreasing the number of scanned pixels, or the sampling rate, relative to the number of samples per inch needed by the printer or other output device. See also interpolation. The process of translating a picture from artwork or transparency into digital information. The degree to which a plot of scanned reflectance or transmittance vs. absolute reflectance or transmittance is a straight line. Deviations in this plot either above or below a straight line represent tones that are recorded by the scanner as too light or too dark.