针对误差分散半调图在黑灰区域的“有界循环”现象，提出了一种基于人眼视觉系统的逆半调算法。
To efficiently remove the limit cycles in dark region of an error-diffused halftone image, an inverse halftoning algorithm based on human visual system is proposed.
煤中汞在锅炉飞灰中被富集，在底灰中被分散。
In coal, the mercury is concentrated in fly ash from boiler and dispersed into bottom ash.
煤中汞在锅炉飞灰中被富集，在底灰中被分散。
In coal, the mercury is concentrated in fly ash from boiler and dispersed into bottom ash.
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