Ricoh Company, Ltd.

Dan Dudas

Walter F Kailey

Florin Neagu

Bogdan Lile

Claudiu Attila Balogh

Systems, methods, and software for halftoning. In an embodiment, a halftone system is configured to store a threshold array comprising an array of threshold elements. The halftone system is further configured to receive a source image comprising an array of pixels with pixel values, and perform a multi-level halftoning process on the source image by partitioning the source image into a sequence of image segments, partitioning the threshold array into a plurality of threshold segments, identifying image segment groups each comprising a set of the image segments that are noncontiguous in the sequence and correspond with a mutual threshold segment of the threshold array, and schedule processing of the image segments in an image segment group as a batch based on the mutual threshold segment.

Reordered multibit halftone processing with a threshold array

Systems, methods, software for image filtering. In one embodiment, a system receives a raster image comprising an array of pixels, divides the raster image into regions of pixels, and identifies a region size limit for the regions. The system performs image filtering on each region with an image filter that operates based on a filter parameter that is adjustable between a first value where minimal filtering is performed and a second value where maximum filtering is performed. For the image filtering, the system measures a compressed region size of the region when compressed with a run-length encoding scheme, computes the filter parameter for the region based on the compressed region size and the region size limit, and applies the image filter on the region based on the filter parameter computed for the region to generate a filtered region having increased redundant patterns of pixel values.

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Timisoara, Romania

Dan Dudas