Ricoh Innovations
 
 

California Research Center  
Research | Education | Publications

Kathrin Berkner

Senior Research Scientist

berkner@rii.ricoh.com
phone: +1.650.496.5714
fax: +1.650.854.8740

2882 Sand Hill Rd., Suite 115
Menlo Park, CA 94025

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I joined Ricoh Innovations in October 1998 as a member of the Color Image Processing group at Ricoh California Research Center. The focus of our group is strongly wavelet-oriented image compression (CREW and JPEG 2000), enhancement, analysis, and representation.

Research Interests

All sorts of wavelet transforms (maximal decimated, shift invariant, complex, continuous wavelet transforms) and wavelet-based signal and image processing techniques: denoising, compression, postprocessing of compressed images, image enhancement, image restoration, sampling, classification, segmentation.

Education

Postdoctoral research associate, Computational Mathematics Laboratory at Rice University, Houston, Texas, 1997-1998.
Ph.D. Mathematics, University of Bremen, Germany, 1996.
Masters (Diplom) in Mathematics, University of Hannover, Germany, 1992.
 

Selected Publications

Adaptation of document image content to viewing device constraints

  • B. Erol, K. Berkner, S. Joshi "Multimedia Thumbnails for Documents" Proceedings of ACM MM'06, pp. 231-240, Santa Barbara, CA, 2006.(pdf)

  • K. Berkner, M. Gormish, "Optimal Display Adaptation of Iconic Document Visualizations via BFOS-type Tree Pruning," Proceedings of ICIP 2006, pp. 2133-2136, Atlanta, USA, 2006. (pdf)

  • B. Erol, K. Berkner, S. Joshi, J. Hull "Computing a Multimedia Representation for Documents Given Time and Display Constraints" Proceedings of ICME 2006, pp. 2133-2136, Toronto, Canada, 2006 (Best Paper Award). (pdf)

  • K. Berkner "How small should a document thumbnail be?" Proceedings of SPIE, vol. 6076, San Jose, 2006.(pdf)

  • K. Berkner, E. L. Schwartz, C. Marle, "SmartNails - Image and Display Dependent Thumbnails," Proceedings of SPIE, vol. 5296, pp. 53-65, San Jose, 2004.(pdf)

  • K. Berkner, E. L. Schwartz, "Resolution-sensitive document image analysis for document repurposing", Proceedings of 37th Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, Nov. 2003 (to appear.(pdf)

    JPEG 2000-related research

  • K. Berkner, E.L. Schwartz, "Removal of Tile Artifacts Using Projection Onto Scaling Functions for JPEG 2000", Proceedings of ICIP2002, vol. 1, pp. 375-378, Rochester, NY, 2002.(pdf)

  • R. Neelamani, K. Berkner, "Adaptive Representation of JPEG 2000 Images using Header-based Processing", Proceedings of ICIP2002, vol. 1, pp. 381-384, Rochester, NY, 2002. (pdf)

  • E.L. Schwartz, K. Berkner and M.J. Gormish, "Optimal tile boundary artifact removal with CREW," Picture Coding Symposium, Portland, OR, April, 1999.

    Wavelet-based denoising

  • K. Berkner,"Enhancement of scanned documents in Besov spaces with applications to image enhancement using wavelet domain representations," Proceedings of SPIE, vol. 4670, pp. 143-154, San Jose, 2002.(pdf)

  • K. Berkner, R.O. Wells, Jr., "Smoothness Estimates for Soft-Threshold Denoising via Translation-Invariant Wavelet Transforms," Applied and Computational Harmonic Analysis, vol. 12, pp. 1-24, 2002.

  • K. Berkner, E.L. Schwartz, M.J. Gormish, "Multiscale sharpening and smoothing in Besov spaces with applications to image enhancement," Applied and Computational Harmonic Analysis, special issue on wavelet applications, vol. 11, no. 1, pp. 2-31, July 2001.

  • K. Berkner, R.O. Wells, Jr., "Denoising via Nonorthogonal Wavelet Transforms," in Wavelet Transforms and Time-Frequency Signal Analysis, L. Debnath, Ed., Birkhauser, Boston, pp. 67-80, 2001.

  • K. Berkner, E.L. Schwartz, M.J. Gormish, M. Boliek, "A new Wavelet-based Approach to Sharpening and Smoothing of Images in Besov Spaces with Applications to Deblurring," Proceedings of ICIP'2000, Vancouver, vol. III, pp. 797-800, 2000.

     

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