Lossless image compression based on multiple-tables arithmetic coding.
Chen, Rung-Ching, Pai, Pei-Yan, Chan, Yung-Kuan, Chang, Chin-Chen (2009)
Mathematical Problems in Engineering
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Chen, Rung-Ching, Pai, Pei-Yan, Chan, Yung-Kuan, Chang, Chin-Chen (2009)
Mathematical Problems in Engineering
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Jacek Śmietański, Ryszard Tadeusiewicz, Elżbieta Łuczyńska (2010)
International Journal of Applied Mathematics and Computer Science
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The analysis of prostate images is one of the most complex tasks in medical images interpretation. It is sometimes very difficult to detect early prostate cancer using currently available diagnostic methods. But the examination based on perfusion computed tomography (p-CT) may avoid such problems even in particularly difficult cases. However, the lack of computational methods useful in the interpretation of perfusion prostate images makes it unreliable because the diagnosis depends mainly...
Jiří Jan, Radim Kolář, Libor Kubečka, Jan Odstrčilík, Jiří Gazárek (2011)
Kybernetika
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The paper presents an overview of image analysis activities of the Brno DAR group in the medical application area of retinal imaging. Particularly, illumination correction and SNR enhancement by registered averaging as preprocessing steps are briefly described; further mono- and multimodal registration methods developed for specific types of ophthalmological images, and methods for segmentation of optical disc, retinal vessel tree and autofluorescence areas are presented. Finally, the...
Marek Kowal, Paweł Filipczuk (2014)
International Journal of Applied Mathematics and Computer Science
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Marek Kowal, Paweł Filipczuk (2014)
International Journal of Applied Mathematics and Computer Science
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Ewa Skubalska-Rafajłowicz (2008)
International Journal of Applied Mathematics and Computer Science
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The aim of this paper is to propose two methods of detecting defects in industrial products by an analysis of gray level images with low contrast between the defects and their background. An additional difficulty is the high nonuniformity of the background in different parts of the same image. The first method is based on correlating subimages with a nondefective reference subimage and searching for pixels with low correlation. To speed up calculations, correlations are replaced by a...
Krzysztof Moliński, Anita Dobek, Kamila Tomaszyk (2012)
Biometrical Letters
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This paper demonstrates the possible conclusions which can be drawn from an analysis of entropy and information. Because of its universality, entropy can be widely used in different subjects, especially in biomedicine. Based on simulated data the similarities and differences between the grouping of attributes and testing of their independencies are shown. It follows that a complete exploration of data sets requires both of these elements. A new concept introduced in this paper is that...
Rebbouh, Amar (2008)
Journal of Applied Mathematics and Decision Sciences
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Jasmina Novaković, Perica Strbac, Dusan Bulatović (2011)
The Yugoslav Journal of Operations Research
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Petrov, Miroslav (2016)
Serdica Journal of Computing
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The image denoising process is of great importance when analyzing images and their visualization. A major problem is finding the boundary between clearing the noise and keeping the salient features in the images. This paper proposes adaptive subband threshold image denoising in a shearlet domain based on the Shannon entropy. The method does not suppose a specific type of noise, it does not require data for its spectrum, nor does it lead to highly complex computational algorithms. ACM...
Paola Campadelli, Raffaella Lanzarotti, Giuseppe Lipori (2006)
RAIRO - Theoretical Informatics and Applications
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We present a novel eye localization method which can be used in face recognition applications. It is based on two SVM classifiers which localize the eyes at different resolution levels exploiting the Haar wavelet representation of the images. We present an extensive analysis of its performance on images of very different public databases, showing very good results.
Maciej Hrebień, Piotr Steć, Tomasz Nieczkowski, Andrzej Obuchowicz (2008)
International Journal of Applied Mathematics and Computer Science
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This paper describes three cytological image segmentation methods. The analysis includes the watershed algorithm, active contouring and a cellular automata GrowCut method. One can also find here a description of image pre-processing, Hough transform based pre-segmentation and an automatic nuclei localization mechanism used in our approach. Preliminary experimental results collected on a benchmark database present the quality of the methods in the analyzed issue. The discussion of common...