kathrin berkner's publications

 
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Kathrin Berkner
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peer-reviewed papers....

Joint digital-optical design of imaging systems

Recent developments in the design of complete imaging systems using a joint design framework have led to astonishing achievements in terms of reduced system size and cost, or extended depth of field of digital-optical imaging systems. Ricoh Innovations has developed a framework of designing the optical elements of an imaging system through an optimization that takes the optics, sensor characteristics, and image processing capabilities into account ( SPIE News article, July 2009).

Berkner, K., Robinson, M.D. Non-rectangular Sampling Technologies for Fast Joint Digital-Optical System Optimization.
Proceedings of of COSI 2009, 2009 (to appear)

Feng, G., Robinson, M.D., Berkner, K. Low-complexity Digital Filter Bank for Strongly Aberrated Optical systems Having Variable F-numbers
Proceedings of of ICIP 2009, 2009 (to appear)

Adaptation of documents to small-size displays

Different displays such as those on mobile phones, on copier display panels, or on electronic book readers impose constraints on formatting options for documents that are available in paginated forms, such as pdf documents. In our work we focus on how to display document information on variable displays such that the information intended to communicate is perceivable, e.g. text readable, images and layout structure recognizable.

Berkner, K. Erol, B. Adaptation of document images to display constraints (invited paper).
Proceedings of of SPIE 2008, vol. 6806, 68061C, 2008

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

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

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

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

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

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

Restoration and enhancement of images using wavelet technologies

Artifacts in digital images may different characteristics. In my work I analyze artifacts that originate from noise, aliased halftone patterns, or compression technologies, such as JPEG 2000.Technologies for artifact removal and image enhancement based on wavelet technologies are deloped. Our wavelet-based solution for denoising and sharpening of document images has been implemented in Ricoh copiers.

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

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

Schwartz, E.L., Berkner, K.
Optimal tile boundary artifact removal with CREW
Picture Coding Symposium, Portland, OR, April, 1999.

Berkner, K.
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.

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

Berkner, K.,Schwartz, E.L., Gormish, M.
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.

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

Berkner, K.,Schwartz, E.L., Gormish, M., Boliek, M.
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

edited academic publications ...

B. Yanikoglu, K. Berkner
Proceedings SIPE Conference on Document Recognition and Analysis Conference, vol. 6815, 2008

K. Berkner, Laurence Likforman-Sulem
Proceedings of SPIE Conference on Document Recognition and Analysis XVI, vol. 7247, 2009

featured in external Ricoh publications...

E. Morimoto, H. Shibaki, T. Suino, H. Okubo, K. Berkner Filtering Method for MFP in the Wavelet Domain
Ricoh Technical Report, vol. 28, pp. 130-135, 2002

B. Erol, K. Berkner Multimedia Thumbnails: A New Way to Browse Documents on Small Display Devices
Ricoh Technical Report, vol. 31, pp. 89-94, 2005