Papers by Giuseppe Papari
Proceedings of SPIE, Feb 15, 2007
Publication in the conference proceedings of EUSIPCO, Florence, Italy, 2006
In this thesis it is explored how far a computer can perform the task of preserving the content o... more In this thesis it is explored how far a computer can perform the task of preserving the content of an image while removing totally or partially its texture information. This problem is studied in two application fields: contour detection and artistic imaging. Concerning contour detection, the state of the art is first reviewed. Several classes of local algorithms are considered, which are mainly based on differential analysis, statistical approaches, phase congruency, rank order filters, and combinations thereof. More sophisticated global methods based on the computation of contour saliency, perceptual grouping, relaxation labeling and active contours are considered too. Then, algorithms for contour detector are developed, which are inspired by several aspects of both low and high level of the human visual system. In particular, a biologically motivated multiresolution contour detector with Bayesian denoising and surround inhibition is proposed, which takes into account several low ...
Image Processing: Algorithms and Systems V, 2007
ABSTRACT What visually distinguishes a painting from a photograph is often the absence of texture... more ABSTRACT What visually distinguishes a painting from a photograph is often the absence of texture and the sharp edges: in many paintings, edges are sharper than in photographic images while textured areas contain less detail. Such artistic effects can be achieved by filters that smooth textured areas while preserving, or enhancing, edges and corners. However, not all edge preserving smoothers are suitable for artistic imaging. This study presents a generalization of the well know Kuwahara filter that is aimed at obtaining an artistic effect,. Theoretical limitations of the Kuwahara filter are discussed and solved by the new nonlinear operator proposed here. Experimental results shows that the proposed operator produces painting-like output images and is robust to corruption of the input image such as blurring. Comparison with existing techniques shows situations where traditional edge preserving smoothers that are commonly used for artistic imaging fail while our approach produces good results.
2009 IEEE 13th Digital Signal Processing Workshop and 5th IEEE Signal Processing Education Workshop, 2009
Lecture Notes in Computer Science, 2005
Lecture Notes in Computer Science, 2009
Lecture Notes in Computer Science, 2009
The interpolation problem of irregularly distributed data in a multidimensional domain is conside... more The interpolation problem of irregularly distributed data in a multidimensional domain is considered. A modification of the inverse distance weighting interpolation formula is proposed, making computation time independent of the number of data points. Only the first K neighbors of a given point are considered, instead of the entire dataset. Additional factors are introduced, preventing discontinuities on points where the
2006 International Conference on Image Processing, 2006
2010 20th International Conference on Pattern Recognition, 2010
2010 IEEE International Conference on Image Processing, 2010
2013 IEEE International Conference on Computer Vision, 2013
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Papers by Giuseppe Papari