Design of Dither Waveforms for Quantized Visual Signals
John O. Limb · Bell System Technical Journal · 1969
Dither signals may be added to coarsely quantized picture signals to mask undesirable contours. We show that a class of differential quantizers is equivalent to ordinary quantizers with respect to the design of dither signals. We give a design method for a number of deterministic and random dither waveforms and evaluate their visibility using a simple model of threshold vision.