Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2006-04-04
2006-04-04
Rogers, Scott A. (Department: 2627)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C358S003210, C358S519000, C358S521000, C358S522000, C382S169000
Reexamination Certificate
active
07023580
ABSTRACT:
An adaptive image tone mapping curve based on perceptual preference guidelines is generated as a sigmoidal function, in which the sigmoidal function parameters (slope and shift) are determined by original image statistics. Tone curves generated for different images each have a smooth sigmoidal shape, so that the tone mapping process does not change the image histogram shape drastically. The sigmoidal function has the form:t(x)=1001+exp(-α(x/100-β)),where α is the slope parameter and β is the shift parameter. The input value x in the sigmoidal function varies in the range [0, 100], because the tone curve is generated on an L* scale, which has values from 0 to 100. The sigmoidal tone curve calculation can be implemented efficiently using simple arithmetic operations by pre-calculating and storing various factors used in the calculation of α and β and by pre-generating a pair of fixed tone curves with two extreme slopes and interpolating between the curves.
REFERENCES:
patent: 4975970 (1990-12-01), Zettel et al.
patent: 5581370 (1996-12-01), Fuss et al.
patent: 5991456 (1999-11-01), Rahman et al.
patent: 6198842 (2001-03-01), Yeo et al.
patent: 6198843 (2001-03-01), Nakauchi et al.
patent: 6198848 (2001-03-01), Honma et al.
patent: 6345128 (2002-02-01), Stokes
patent: 6393148 (2002-05-01), Bhaskar
patent: 6822762 (2004-11-01), Moroney et al.
patent: 6826310 (2004-11-01), Trifonov et al.
patent: 0 848 545 (1997-11-01), None
CIE (1978); Recommendations on Uniform Color Spaces—Color Difference Equations Psychometric Color Terms;Commission Internationale De L 'Eclairage International Commission on Illumination Internationale Beleuchtungskommission; Supplement No. 2 to CIE Publication No. 15; (France); 10 pages.
Holm, J. (1996); Photographic Tone and Colour Reproduction Goals;CIE Expert Symposium on Colour Standards for Image Technology; pp. 51-56.
Jobson, D., Rahman, Z., and Woodell, G. (1997); A Multiscale Retinex For Bridging the Gap Between Color Images and Human Observation of Scenes;IEEE Transactions on Image Processing; vol. 6 No. 7; pp 965-976.
Larson, G. W., Rushmeier, H., and Piatko, C. (1997); A Visibility Matching Tone Reproduction Operator for High Dynamic Range Scenes.IEEE Transactions on Visualization and Computer Graphics, vol. 3 No. 4; pp. 291-306.
Rahman, Z., Jobson, D., and Woodell, G. (1996); Multi-scale Retinex for Color Image Enhancement;Proceedings, International Conference on Image Processing, vol. 3; (Lausanne, Switzerland); pp. 1003-1006.
Rahman, Z., Woodell, G., Jobson, D.; A Comparison of the Multiscale Retinex With Other Image Enhancement Techniques; College of William & Mary; NASA Langley Research Center; 6 pages.
Tanaka, T., Berns, R. S., and Fairchild, M.D. (1997); Predicting the Image Quality of Color Overhead Transparencies Using a Color-appearance Model;Journal of Electronic Imaging, vol. 6 No. 2; pp. 154-164.
Tumblin, J. and Rushmeier, H. (1993); Tone Production for Realistic Images;IEEE Computer Graphics and Applications; vol. 13 No. 6; pp. 42-48.
Tumblin, J. and Turk, G. (1999); LCIS: A Boundary Hierarchy for Detail-preserving Contrast Reduction;Computer Graphics Proceedings;SIGGRAPH 99; pp. 83-90.
European Search Report dated Nov. 29, 2004.
Yuichi Kobayashi and Toshikazu Kato—“A High Fidelity Contrast Improving Model Based On Human Vision Mechanisms”; 0-7695-0253—Sep. 9, 1999; 1999 IEEE; pp. 578-584.
Gustav J. Braun and Mark D. Fairchild—“Image Lightness Rescaling Using Sigmoidal Contrast Enhancement Functions”; Journal Of Electronic Imaging, Oct. 1999, vol. 8(4); pp. 380-393.
Baharav Izhak
Jones Robert W.
Reid Donald M.
Zhang Xuemei
Agilent Technologie,s Inc.
Rogers Scott A.
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