Dispersed Error Control based on Error Filter Design for Improving Halftone Image Quality

The error diffusion method generates worm artifacts, and weakens the edge of the halftone image when the continuous gray scale image is reproduced by a binary image. First, to enhance the edges, we propose the edge-enhancing filter by considering the quantization error information and gradient of the neighboring pixels. Furthermore, to remove worm artifacts often appearing in a halftone image, we add adaptively random noise into the weights of an error filter.

Authors:

• Sang-Chul Kim
• Sung-Il Chien

Keywords:

• Artifact suppression
• Edge enhancement
• Error diffusion method
• Halftone image

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