Global Graphics Software Limited

Daniel Joseph Cook

Kian Min Lim

A method of processing a document for printing includes receiving a document; for at least one of the plurality of regions, determining a drop size for that region and determining whether the drop size for printing the region meets a threshold criterion and, if so, processing the region using a tile-based screen for halftoning and, if not, processing the region using an error diffusion screen for halftoning; and printing the processed regions. Another method includes additionally considering coverage level to determine whether to use a tile-based screen or error diffusion screen. Yet another method includes determining whether the region is within a threshold range of a drop step change.

Methods and systems for processing documents using multiple halftone screening techniques

A method of determining multi-level printing parameters for a printing device includes identifying printing parameters for each of multiple colorant levels; providing at least one density measurement at a known coverage for each colorant level; providing an aim curve relating input tone value to printed density value; and identifying multiple test parameter sets. The method further includes, for each of the test parameter sets at each of multiple input tone values, determining a printed density value based on the parameters of the test parameter set and the density measurements, and determining an error value from differences between the determined printed density values and the aim curve. The method also includes selecting one of the test parameter sets using the determined error values; and communicating the selected one of the plurality of test parameter sets for receipt by the printing device for printing documents. Systems and software can employ the method.

Systems and methods for managing printing using multiple colorant levels

A method of printing a document includes providing a document to a printer for printing; sending a portion of the document from the printer to an external service provider for temporary storage; and storing the portion of the document on the external service provider. The external service provider comprises a computing device or a server. The method further includes requesting that the portion of the document be sent from the external service provider to the printer for printing; sending the portion of the document from the external service provider to the printer; and printing the portion of the document using the printer.

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Cambridge, United Kingdom

Daniel Joseph Cook