Digital Halftoning as 2-D Delta-Sigma Modulation

  title={Digital Halftoning as 2-D Delta-Sigma Modulation},
  author={Thomas D. Kite and Brian L. Evans and T. L. Sculley and Alan C. Bovik},
|The error di usion algorithm for digital halftoning is equivalent in form to a noise-shaping feedback coder, a class of delta-sigma modulator. The white noise assumption of the quantizer error is known to be false; in fact, the quantizer error is seen to be highly correlated with the input image. To account for this correlation, we use a gain model for the quantizer. This model accurately predicts the edge sharpening and noise shaping caused by all error di usion schemes. It also permits an… CONTINUE READING
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