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Simple cell interaction for iterative contrast detection

Simple cell interaction for iterative contrast detection

引用

IEEE International conference on Artificial Intelligence Systems (ICAIS)

作者： M. Kolesnik A. Barlit E. Zubkov Fraunhofer Institute for Media Communication TSURE TSURE Germany

This work describes a novel model for contrast detection inspired by regular spatial structure of simple cells in the visual cortex of mammals. The model employs major cortical connections in the laminar circuitry of extrastriate visual pathways and the area V1 of the visual cortex. The model employs two new features, namely, the iterative processing of visual inputs and amplification of tuned responses of spatially close simple cells in V1. Results show that after several iterations the processing converges to a stable solution while making edge detection being largely contrast independent. The model suppresses spurious noise in the vicinity of contrastive luminance changes while enhancing isolated low-intensity changes. We demonstrate the capabilities of the model by processing synthetic as well as natural images and compare our results to Canny edge detector.

关键词： image edge detection Brain modeling Detectors Retina Object detection visual system Radio frequency Slabs Circuits image converters

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A cross-type peak-and-valley filter for error prevention and resilience in image communications 3rd

A cross-type peak-and-valley filter for error prevention and...

引用

3rd IEEE Pacific Rim conference on Multimedia, PCM 2002

作者： Chang, Chin-Chen Hsiao, Ju-Yuan Chiang, Chi-Lung Department of Computer Science and Information Engineering National Chung Cheng University Chiayi62107 Taiwan Department of Information Management National Changhua University of Education Changhua500 Taiwan

ISBN: (纸本)3540002626

The peak-and-valley filter has been shown to be a fast and efficient filter in suppressing impulsive noise. In order to find the best filtering route, we have tested several different kinds of scanning orders, such as zigzag scan, Hilbert curve, etc. The result of the tests shows the vertical scanning order is the best one. Next, we have incorporated a simple edge detection scheme into the peak-and-valley filter and then propose a new filter, called the cross-type peak-and-valley filter. Experimental results show that our filter with vertical filtering route outperforms the peak-and-valley filter proposed by Windyga. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Impulse noise

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Task-flow analysis of video object detection for C6X implementation

Task-flow analysis of video object detection for C6X impleme...

引用

International conference on communications, Circuits and Systems (ICCCAS)

作者： Wang Dongsheng Li Zaiming Institute of Communication and Information Engineering University of Electronic Science and Technology Chengdu China

This paper analyses a general-purpose system for video acquisition and real-time video object detection, from the point of task flow, to acquire the flow structure of the system. Based on this, and the criteria of optimal system design, a system project based on the C6X DSP is put forward. This project reduces the hardware scale the furthest and improves resource utilization efficiency.

关键词： Object detection Video sequences Digital signal processing Real time systems Signal processing Arithmetic Hardware image sequence analysis Information analysis image processing

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Impressionism, Ukiyo-e and Color Imaging: A fMRI Study of Color Related visual Cortex: V4

Impressionism, Ukiyo-e and Color Imaging: A fMRI Study of Co...

引用

Final Programme and Proceedings;First European conference on Colour in Graphics, Imaging and Vision (CGIV'2002)

作者： Ichihara, Yasuyo G. Nakadomari, Satoshi Takeuchi, Hiroaki Miyauchi, Satoru Kitahara, Kenji Dept. of Arts Hosen Gakuen College Tokyo Japan Communications Research Laboratory Tokyo Japan Jikei University School of Medicine Tokyo Japan

ISBN: (纸本)0892082399

Color imaging is produced from Neo-Impressionism that is the pictures of George Seurat and Paul Signac 19th Century French painting. These pictures are composed by many color dots, and modern color imaging is constructed of red, green and blue color pixels on a color display. This color imaging system is only one of some systems of the seeing world in our brain. We suggest that there are various seeing color systems from our retina to our brain. Post Impressionists painted their pictures with various methods and experimented to represent the color world in the brain. Impressionism was greatly influenced by Japanese Ukiyo-e art and artists like Hokusai and Hiroshige. This is called Japonism, the influence of Japanese art on European art, especially impressionism. Ukiyo-e is a kind of multicolored wood-block print of the Edo period (1603 - 1867). At first, there were just one color wood-block prints with brush-added color in the 1710s, then two or three color wood-block prints evolved in the 1740s, and finally in the 1760s the multicolor wood-block prints called "nishiki-e" were invented. Ukiyo-e's style differs from European traditional arts and predates Impressionism. It involves drawing the outline of objects and one color painting. The print is composed of the multicolored plane surfaces. The research of modern scientists has thrown new light on the subject of the difference of picture styles by seeing directly our brain activity using functional magnetic resonance imaging system. We created some pictures inspired by the pictures of Post Impressionists and Ukiyo-e for functional magnetic resonance imaging to test multiple color-sensitive areas in human ventral occipitotemporal cortex. The results showed that area V4 is activated by the stimulus of reading shapes from its color but not by the stimulus of seeing a colour dot. We suggest V4 is activated by figures composed of colour dots with geometric pattern, and V4 has low response to the camouflage figure in whic

关键词： Color image processing

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Improved illumination-invariant descriptors for robust colour object recognition

Improved illumination-invariant descriptors for robust colou...

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International conference on Acoustics, Speech, and Signal processing (ICASSP)

作者： R.J. O'Callaghan D.R. Bull Image Communications Group Centre for Communications Research University of Bristol Bristol UK

Colour object recognition is heavily influenced by variation in the scene illumination conditions. This paper proposes a set of illumination-invariant descriptors of image content. The descriptors are based on a moment-based approach to histogram comparison and, in the case of an object imaged under two different lighting conditions, permit straightforward recovery of the illumination change involved. The efficacy of the descriptors is compared experimentally with a variety of existing techniques, using an established methodology and an existing purpose-built dataset. The evidence suggests that the new descriptors outperform existing techniques in the area of colour object recognition.

关键词： image recognition Presses Three dimensional displays World Wide Web image color analysis image segmentation Pixel

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image watermarking in the Fourier domain using the Mojette transform

Image watermarking in the Fourier domain using the Mojette t...

引用

International conference on Digital Signal processing (DSP)

作者： F. Autrusseau J. Guedon IRCCyN IVC Ecole Polytechnique de l''Universite de Nantes Nantes France

The work presented here deals with digital image watermarking and a new Fourier based embedding method is presented. The watermarking location scheme optimization is performed by the use of a psychovisual criteria suitable with the Fourier domain and given from properties of the model of the human visual system (HVS). The watermark design and extraction exploits the Mojette transform properties which are recalled. The embedding as well as the extraction processes are described and exemplified through some classical attacks onto a standard image.

关键词： Watermarking Fourier transforms Psychology Robustness Humans Discrete cosine transforms Discrete transforms visual system Frequency Digital images

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Enhanced receiver structure for cellular multiple-access systems with two service classes

Enhanced receiver structure for cellular multiple-access sys...

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4th International ITG conference on Source and Channel Coding

作者： Mecking, Michael Dawy, Zaher Seeger, Alexander Inst. for Communications Engineering Munich University of Technology Arcisstr. 21 D-80299 Munich Germany Information and Communication Mobile Siemens AG D-81379 Munich Germany

Information theoretic considerations for the uplink of a cellular mobile communication system with two service classes are presented. Different receiver structures are compared on the basis of achievable rates, required received powers, and supportable number of users. The channels considered are restricted to AWGN channels. Particular emphasis is on interference modeling via spill-over factors for large number of users and different decoding schemes including stripping receivers. This work offers theoretical bounds for practical cellular systems and gives an insight into the effects of the different system parameters on performance.

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Study on transforming from painting to music

Study on transforming from painting to music

引用

IEEE Region 8 International Symposium on Video/image processing and Multimedia communications (EURASIP)

作者： Xia Mao Bin Chen Gang Zhu T. Hoshino Department of Electronic Engineering Beijing University of Aeronautics and Astronautics Beijing China Department of Electrical Engineering Graduate School of Engineering Kyoto University Kyoto Japan

This paper aims at probing into the mapping relationship and rules between painting and music. After the examination of corresponding relation between image and music, relevant arithmetic is put forward in accordance with certain principles in scientific and art, in which the original information in the image is converted into musical information, thus enabling people to obtain visual impression from audio objects and achieving the integration of science and art.

关键词： Painting Multiple signal classification Music Art image converters Computer graphics Rhythm Concrete Arithmetic History

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Dual-mode image quality assessment metric

Dual-mode image quality assessment metric

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IEEE Region 8 International Symposium on Video/image processing and Multimedia communications (EURASIP)

作者： F.Z.C. Chin C.S. Xydeas Department of Communication Systems Lancaster University Lancaster UK

This paper presents a perceptual image quality assessment metric based on the visible differences predictor (VDP) (Daly, 1993). The proposed metric operates in two modes. In quality mode, the metric produces a single value representation of the overall visible image quality (VIQ), whereas in distortion mode, the metric provides four distortion values each associated with a specific type of image content. The correlation coefficient between the objective VIQ and subjective test results is 0.96, compared to 0.86 obtained by the PSNR measure.

关键词： image quality image edge detection Nonlinear distortion PSNR Distortion measurement Humans Pixel Testing visual system Frequency

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Meet iCAM: A next-generation color appearance model

Meet iCAM: A next-generation color appearance model

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Final Program and Proceedings of the 10th IS and T/SID Color Imaging conference: Color Science, Systems and Applications

作者： Fairchild, Mark D. Johnson, Garrett M. Munsell Color Science Laboratory Center for Imaging Science Rochester Institute of Technology Rochester NY United States

For over 20 years, color appearance models have evolved to the point of international standardization. These models are capable of predicting the appearance of spatially-simple color stimuli under a wide variety viewing conditions and have been applied to images by treating each pixel as an independent stimulus. It has been more recently recognized that revolutionary advances in color appearance modeling would require more rigorous treatment of spatial (and perhaps temporal) appearance phenomena. In addition, color appearance models are often more complex than warranted by the available visual data and limitations in the accuracy and precision of practical viewing conditions. Lastly, issues of color difference measurement are typically treated separate from color appearance. Thus, the stage has been set for a new generation of color appearance models. This paper presents one such model called iCAM, for image color appearance model. The objectives in formulating iCAM were to simultaneously provide traditional color appearance capabilities, spatial vision attributes, and color difference metrics, in a model simple enough for practical applications. The framework and initial implementation of the model are presented along with examples that illustrate its performance for chromatic adaptation, appearance scales, color difference, crispening, spreading, high-dynamic-range tone mapping, and image quality measurement. It is expected that the implementation of this model framework will be refined in the coming years as new data become available.

关键词： Color image processing

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