| 摘要 |
<p>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 (24, 26, 28) based upon bodies of text having the same color. A text layer (12, 16, 20) and a non-text layer (14, 18, 22) are specified for each region (24, 26, 28). The text layer (12, 16, 20) 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 (14, 18, 28) 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 (12, 16, 20) is compressed using a lossless compression method and the non-text layer (14, 18, 22) is compressed using a lossy compression method.</p> |
