Transcode PCL delta-row compressed image to edges

A system for transcoding a delta row encoded image, the system comprising:

• a computer and a printer comprising one or more processors and one or more non-transitory tangible storage devices storing computer executable software programs for implementing a method comprising the steps of:
• receiving the delta row encoded image comprising terms each comprising an offset and replacement bytes for each changed portion to the exclusion of storing unchanged portions;
• subdividing the delta row encoded image into a plurality of delta row encoded tiles based on predetermined tile boundaries;
• determining, for a row of the delta row encoded image, terms comprising a tile offset and replacement bytes for each changed portion within a delta row encoded tile using the predetermined tile boundaries, stored offsets and replacement bytes, the tile offsets and the replacement bytes being determined to allow for independent processing of the differentially encoded tiles;
• determining edges within each of the delta row encoded tiles based on the determined tile offsets, bypassing an edge detection process for unchanged portions of the differentially encoded tile;
• and
• transcoding the delta row encoded image by encoding the identified edges.

One or more computer readable non-transitory tangible storage devices storing computer executable software programs for directing one or more processors to implementing a method for transcoding a delta row encoded image, the programs comprising:

• computer executable code for receiving the delta row encoded image comprising terms each comprising an offset and replacement bytes for each changed portion to the exclusion of storing unchanged portions;
• computer executable code for subdividing the delta row encoded image into a plurality of delta row encoded tiles based on predetermined tile boundaries;
• computer executable code for determining, for a row of the delta row encoded image, terms comprising a tile offset and replacement bytes for each changed portion within a delta row encoded tile using the predetermined tile boundaries, stored offsets and replacement bytes, the tile offsets and the replacement bytes being determined to allow for independent processing of the differentially encoded tiles;
• computer executable code for determining edges within each of the delta row encoded tiles based on the determined tile offsets, bypassing an edge detection process for unchanged portions of the differentially encoded tile;
• and
• computer executable code for transcoding the delta row encoded image by encoding the identified edges.