Mr. Mithun Mukherjee Profile

Mithun Mukherjee

at Rochester Institute of Tech

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Proceedings Article | 17 January 2005 Paper

A multiresolution halftoning algorithm for progressive display

Mithun Mukherjee, Gaurav Sharma

Proceedings Volume 5667, (2005) https://doi.org/10.1117/12.584430

KEYWORDS: Image resolution, Halftones, Spatial resolution, Image transmission, Diffusion, Binary data, Image storage, Image restoration, Data storage, Image processing

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We describe and implement an algorithmic framework for memory efficient, 'on-the-fly' halftoning in a progressive transmission environment. Instead of a conventional approach which repeatedly recalls the continuous tone image from memory and subsequently halftones it for display, the proposed method achieves significant memory efficiency by storing only the halftoned image and updating it in response to additional information received through progressive transmission. Thus the method requires only a single frame-buffer of bits for storage of the displayed binary image and no additional storage is required for the contone data. The additional image data received through progressive transmission is accommodated through in-place updates of the buffer. The method is thus particularly advantageous for high resolution bi-level displays where it can result in significant savings in memory. The proposed framework is implemented using a suitable multi-resolution, multi-level modification of error diffusion that is motivated by the presence of a single binary frame-buffer. Aggregates of individual display bits constitute the multiple output levels at a given resolution. This creates a natural progression of increasing resolution with decreasing bit-depth.

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