Image processing apparatus and method for quantizing pixel of interest by error diffusion method
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United States of America Patent
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May 1, 2012
Grant Date -
Oct 8, 2009
app pub date -
Mar 27, 2009
filing date -
Apr 2, 2008
priority date (Note) -
Expired
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Abstract
A quantizing unit, error detector, error diffusion matrix, and adder quantize a pixel of interest of an input image by an error diffusion method. A calculation unit and gain adjuster calculate a value to be added to the pixel of interest with reference to quantized pixels. The adder adds the calculated value to the pixel of interest. A control unit controls the calculation of the gain adjuster.
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