Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2007-01-16
2007-01-16
Rogers, Scott A. (Department: 2625)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C358S003170, C358S003260, C358S533000, C358S535000
Reexamination Certificate
active
10185894
ABSTRACT:
A method and apparatus for performing color halftoning using block quantization is disclosed. In one embodiment, the method comprises dividing an input image into a plurality of blocks, clustering pixels in each of the plurality of blocks into a plurality of color groups, block quantizing each of the plurality of color groups for each of the plurality of blocks to a representative color value, and creating an output halftone image having a distinct block associated with each block in the plurality of blocks, with the representative color value for each group in each distinct block being approximated over a spatial area covered by the group in said each distinct block.
REFERENCES:
patent: 5493416 (1996-02-01), Fan
patent: 5602943 (1997-02-01), Velho et al.
Anastassiou, Dimitris, Error Diffusion Coding for A/D Conversion, IEEE Transactions On Circuits And Systems, vol. 36, No. 9, Sep. 1989, pp. 1175-1186.
Breaux, Nancy, et al., Wavelet methods for compression, rendering, and descreening in digital halftoning, Proc. Of the SPIE, vol. 3078, 1997, pp. 656-667.
Damera-Venkata, Niranjan, et al., FM Halftoning Via Block Error Diffision, Proc. Of IEEE ICIP, 2001, pp. 1081-1084.
Floyd, Robert W., et al., An Adaptive Algorithm for Spatial Greyscale, Proceedings of the Society for Information Display, vol. 17, No. 2, 1976, pp. 75-77.
Gooran, Susan, Halftoning and Color Noise, IS& T/SID Ninth Color Imaging Conference, 2001, pp. 184-188.
Gupta, Maya, et al., Block Quarterization: A New Method For Color Halftoning, Proc. Of the IEEE ICIP, 2000, 4 pages.
Katsavounidis, Ioannis, et al., A Multiscale Error Diffusion Technique for Digital Halftoning, IEEE Transactions On Image Processing, vol. 6, No. 3, Mar. 1997, pp. 483-490.
Katsavounidis, Ioannis, et al., A Recursive Multiscale Error-Diffusion Technique for Digital Halftoning1, SPIE Conference Proceedings, vol. 2094, 1993, pp. 487-498.
Pappas, Thrasyvoulos N, et al., Least-Squares Model-Based Halftoning, IEEE Transactions On Image Processing, vol. 8, No. 8, Aug. 1999, pp. 1102-1116.
Wong, Ping Wah, Mean Matching Halftoning on a Rotated Quad-tree Structure, Proc. SPIE, vol. 2657, 1996, pp. 448-455.
Zakhor, Avideh, et al., A New Class of B/W and Color Halftoning Algorithms*, Proc. ICASSP, vol. 4, 1991, pp. 2801-2804.
Blakely , Sokoloff, Taylor & Zafman LLP
Ricoh Co. Ltd.
Rogers Scott A.
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