Compound document image compression using multi-region two...

Details Compound document image compression using multi-region two... Compound document image compression using multi-region two...

2006-12-05

2006-12-05

Lee, Thomas D. (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Communication

C358S500000, C358S504000, C358S406000

Reexamination Certificate

active

07145676

ABSTRACT:
Two layer formatting of documents for compatibility with two layer formatting schemes while maintaining color information and edge sharpness for text. A document is divided into multiple regions based upon bodies of text having the same color. A text layer and a non-text layer are specified for each region. The text layer includes a text color along with binary values for each pixel to specify whether to use the text color or a background color. The non-text layer includes a red-green-blue value for each pixel to specify its color for both image or non-text information including the background color for the bodies of text. The text layer is compressed using a lossless compression method and the non-text layer is compressed using a lossy compression method.

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