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| | MRC & JBIG2 Xerox is licensing its core technology for the Mixed-Raster Content Imaging model (MRC). The MRC imaging model is a central component of current and emerging standards for the communication of rasterized documents: ITU T.44 (MRC), T.37 (Internet Fax), JPEG2000, and JBIG2. The Xerox MRC technology suite spans multiple imaging sub-disciplines, including scanning, image segmentation, representation, compression and rendering.
The MRC imaging model represents a document as three "layers": a Foreground plane, a Mask plane and a Background plane. By distributing the image content according to type across these three layers, we can optimally represent a rasterized document. As an example, consider a raster document with text, photographs and graphical elements. Using the MRC imaging model we might place photographic elements in the Background plane, colored graphical elements (including text color) in the Foreground plane, and text shapes (or other similar high frequency, high contrast elements) in the Mask plane. Since text carries visual information at high contrast and spatial frequency, it can be encoded as 1 bit per pixel at 600 spi. The values of 0 and 1 for the Mask plane indicate which of the two other planes should be used for reconstruction of the composite image. In contrast to text, the accurate communication of photographic and colored graphical visual information requires fewer pixels per i nch (lower spatial frequency), but requires more bits per pixel. To compress the image, we would use a binary and typically lossless algorithm, e.g., MMR, while the Background and Foreground planes would be compressed using a continuous tone, and typically, lossy algorithm, e.g., JPEG.
• Uncompromised, accurate, device-independent representation of rasterized documents • Efficient, high quality communication of photographs, graphics and text • Formatted documents suitable for printing at production print speeds • Conformance with current and emerging standards
Key to achieving the full benefits of MRC based solutions are efficient and correct image segmentation, choice of encoding schemes, compression techniques, and rendering technologies. MRC & JBIG2 Standard Xerox technology is available for implementation of the JBIG2 and JPEG 2000 standards. For more information about acquiring a license to practice either of these standards, please follow the appropriate link. JBIG2 Licensing Agreement JPEG 2000 Licensing Agreement Image Segmentation and Representation
Object Optimized Rendering
For the purposes of implementing the ISO/IEC 14492:2000 standard and ITU-T Recommendation T.88, Xerox makes available a limited, royalty-free, non-exclusive license to relevant patents as described in the agreement available for download from this site. A copy of the license agreement is available as an Adobe PDF document for your review. If you are interested in executing this agreement, please contact Xerox. For the purposes of implementing the ISO/IEC 15444-6 standard, Xerox makes available a limited, royalty-free, non-exclusive license to specified claims in relevant patents as described in the agreement available for download from this site. A copy of the license agreement is available as an Adobe PDF document for your review. If you are interested in executing this agreement, please contact Xerox.
To learn more about licensing the MRC & JBIG2 technology, contact Xerox. Read more about MRC & JBIG2 technology in this press release.  | |
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