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Diagnosis of Diabetic Retinopathy through Slit Lamp Images

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13th International Conference on Biomedical Engineering (ICBME)

作者： David, J. Kumar, A. Sukesh Vineeth, V. V. Coll Engn Trivandrum Kerala India

ISBN: (纸本)9783540928409

A new system is developed for the diagnosis of diabetic retinopathy. It is developed with the help of slit lamp biomicroscopic retinal images. The results are compared with digital fundus image using image processing techniques. The slit lamp, offering users both space savings and cost advantages. By using slit lamp biomicroscopic equipment with an ordinary camera, users can reduce the cost more than 30 times compared to digital fundus camera. The fundus examination was performed on human volunteers with a hand held contact or non-contact lens (90D). The lens providing an extremely wide field of view and better image resolution. The slit lamp equipment is used to examine, treat (with a laser), and photograph (with a camera) of the retina. A digital camera is permitted to capture the image and store this image by using slit lamp, each photograph have small potion of the entire retinal image. The individual slit lamp biomicroscopic fundus images are aligned and blended with block matching algorithm to develop an entire retinal image same as the fundus camera image and detect optic disk, blood vessel ratio from the images. This image can be used for the diagnosis of diabetic retinopathy.

关键词： block matching algorithm Sum of squared difference Diabetic retinopathy Optic disk Blood vessel ratio

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A DSP architecture for motion estimation accelerating

A DSP architecture for motion estimation accelerating

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International Symposium on Intelligent Multimedia, Video and Speech Processing

作者： Zhang, C Yang, K Mai, SP Wang, ZH Tsing Hua Univ Dept Elect Engn Beijing 100084 Peoples R China

ISBN: (纸本)0780386876

Motion estimation (ME) consumes a majority of computation capacity of DSP in video compression application. A modified DSP architecture to accelerate ME algorithms is presented in this paper. The proposed SIMD and VLIW architecture is a trade-off between ASIC implementation and DSP implementation of ME, which can perform subtract, absolute and add (SAA) operation on 8 pixels and fetch 8 new pixels from memory at the same time. Flexible align addressing mode is provided to support efficient and continuous SAA operation on video stream. The DSP is estimated 20 times faster than SISD architecture to perform ME algorithms.

关键词： video coding digital signal processing chips motion estimation reduced instruction set computing parallel processing motion compensation parallel machines application specific integrated circuits digital arithmetic RISC processor single instruction multi data motion compensation block matching algorithm DSP architecture motion estimation acceleration video compression SIMD architecture VLIW architecture ASIC implementation subtract operations absolute operations add operations pixel SAA operations align addressing mode video streams

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A simple estimation of the rotation parameter for the 2-axes stabilization system

A simple estimation of the rotation parameter for the 2-axes...

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19th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2004)

作者： Kim, DN Kim, KH Jung, TY Kim, DG Kyungpook Natl Univ Sch Elect Engn & Comp Sci Taegu 702701 South Korea Agcy Def Dev Taejon 300600 South Korea

The recent sight system requires high stabilization functions for the longer range of observation and the higher kill probability. To this end, it is necessary to compensate rotational disturbances which are not stabilized with the conventional 2-axes stabilization system. This paper proposes a simple method on the rotational motion estimation for the stabilization of the sight system.

关键词： digital image stabilization block matching algorithm motion estimation

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NIOS II processor-based acceleration of motion compensation techniques

NIOS II processor-based acceleration of motion compensation ...

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Conference on Independent Component Analyses, Wavelets, Neural Networks, Biosystems, and Nanoengineering IX

作者： Gonzalez, Diego Botella, Guillermo Mookherjee, Soumak Meyer-Baese, Uwe Meyer-Baese, Anke Univ Complutense Madrid Dept Comp Architecture E-28040 Madrid Spain Florida State Univ Dept Elect & Comp Engn Tallahassee FL 32310 USA Florida State Univ Dept Comp Sci Tallahassee FL 32310 USA

ISBN: (纸本)9780819486325

This paper focuses on the hardware acceleration of motion compensation techniques suitable for the MPEG video compression. A plethora of representative motion estimation search algorithms and the new perspectives are introduced. The methods and designs described here are qualified for medical imaging area where are involved larger images. The structure of the processing systems considered has a good fit for reconfigurable acceleration. The system is based in a platform like FPGA working with the Nios II Microprocessor platform applying C2H acceleration. The paper shows the results in terms of performance and resources needed.

关键词： Computer Vision Optical Flow MPEG Compression block matching algorithm NIOS II FPGA Embedded Systems

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Subpixel Subtle Motion Estimation of Micro-Expressions Multiclass Classification 2

Subpixel Subtle Motion Estimation of Micro-Expressions Multi...

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2nd IEEE International Conference on Signal and Image Processing (ICSIP)

作者： Muna, Niyalatul Rosiani, Ulla Delfana Yuniarno, Eko Mulyanto Purnomo, Mauridhi Hery Inst Teknol Sepuluh Nopember Dept Elect Engn Surabaya Indonesia Inst Teknol Sepuluh Nopember Dept Comp Engn Surabaya Indonesia

ISBN: (纸本)9781538609699

Communication between one individual and another can be delivered in different ways, not only through speech, writing and body motions. Communication can also be delivered through basic emotions one feels through visible facial expressions. Facial expressions displayed in the forms of emotional expressions can be demonstrated briefly or quickly, which is known as micro-expression. The subtle motion of micro facial expression in every exchange makes many people find it difficult to identify and recognize the ongoing emotion. Therefore, this study proposes the recognition of micro-expression emotions with estimated subtle motion in the image sequence based on onset-frame, apex-frame, and offset-frame for feature extraction. The method used for feature extraction are the combination of block matching algorithm with Taylor Series Approximation referred to as Subpixel Subtle Motion Estimation (SME). Multiclass Classification process using Multilayer Perceptron (MLP) Backpropagation and Support Vector Machine (SVM) as a comparison. The evaluation results show the best accuracy 85.07%, with the Mean Absolute Error 0.0597 and Root Mean Square Error 0.2443.

关键词： component micro-expressions subpixel subtle motion estimation block matching algorithm taylor series approximation multiclass classification

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An Efficient Motion Estimation algorithm using Division Mechanism of Low and High Motion Zone

An Efficient Motion Estimation Algorithm using Division Mech...

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IEEE International Multi Conference on Automation, Computing, Control, Communication and Compressed Sensing (iMac4s)

作者： Acharjee, Suvojit Dey, Nilanjan Biswas, Debalina Maji, Prasenjit Chaudhuri, Sheli Sinha Jadavpur Univ ETCE Dept Kolkata W Bengal India JIS Coll Engn Dept IT Kalyani W Bengal India JIS Coll Engn Dept CSE Kalyani W Bengal India

ISBN: (纸本)9781467350907;9781467350891

Motion Estimation involves the most computation as compared to other processes in the entire video compression process. The challenge is to reduce the computation cost and computation time to calculate motion vector compared to Full Search algorithm for motion vector estimation. In this paper, it is proposed to implement an algorithm which will find finer estimation of motion for higher motion zone and take less time in computing motion vector for less movement zone.

关键词： Fast Motion Vector Estimation Motion Vector Estimation block matching algorithm

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A new programmable video signal processor for motion estimation and motion compensation

A new programmable video signal processor for motion estimat...

引用

Conference on Visual Communications and Image Processing 2001

作者： Gong, D He, Y Tsinghua Univ Dept Elect Engn State Key Lab Microwave & Digital Commun Beijing 100084 Peoples R China

ISBN: (纸本)0819439886

A new programmable and parallel video signal processor (PVSP) is proposed to implement a class of fast block matching algorithms (BMA). Five parameters are used to embody the various fast BMAs and a generic framework for the fast BMA is designed. Then PVSP is designed and the BMA algorithms are mapped onto it. The key modules of PVSP are discussed in details. PVSP uses horizontal and vertical mapping strategies to implement byte-aligned and circular addressing. Under these two mapping strategies the memory system of PVSP can be configured flexibly. The regular, iterative and low-delay tree adder without any pipeline stages is chosen as the key computation component to implement the BMA. With scalable tree adder, PVSP can be easily expanded to meet higher computing requirement. PVSP is estimated to have approximately 30kGates and 40kb SRAM and it can work at the frequency of 133MHz. It can support the motion estimation and motion compensation tasks in real-time for MPEG2 MP@ML encoder.

关键词： motion estimation block matching algorithm programmable video signal processor byte-aligned and circular addressing tree adder

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ADAPTIVE PARTIAL DISTORTION SEARCH algorithm USING HISTOGRAM-BASED SORTING

ADAPTIVE PARTIAL DISTORTION SEARCH ALGORITHM USING HISTOGRAM...

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IEEE International Conference on Multimedia and Expo (ICME 2008)

作者： Park, Sang-Jun Jin, Soonjong Jeong, Jechang Hanyang Univ Image Commun & Signal Proc Lab Seoul 133791 South Korea

ISBN: (纸本)9781424425709

In this paper, an efficient algorithm for the fast full search is proposed to reduce the computational cost of block matching algorithm for motion estimation in video coding. Based on the characteristic of the pixel histogram for the current macroblock, the proposed fast matching method adaptively sorts the matching order pixel-by-pixel for each macroblock. Also, partial distortion elimination (PDE) method was used to terminate the improper candidate macroblocks early after the process of multilevel successive elimination algorithm (MSEA). The varieties of test sequences were simulated and the experimental results demonstrate that the proposed algorithm achieves less computational load.

关键词： motion estimation block matching algorithm partial distortion elimination fast full search histogram

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Region of Interest in Disparity Mapping for Navigation of Stereo Vision Autonomous Guided Vehicle

Region of Interest in Disparity Mapping for Navigation of St...

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International Conference on Computer Technology and Development

作者： Abu Hasan, Anwar Hasni Hamzah, Rostam Affendi Johar, Mohd Haffiz Univ Sains Malaysia Sch Elect & Elect Engn George Town Malaysia UTeM Fac Elect & Comp Engn Melaka Malaysia

ISBN: (纸本)9780769538921

Stereo vision system is a practical method for depth gathering of objects and features in an environment. This paper presents the region of interest in disparity mapping for stereo vision autonomous guided vehicle using block matching algorithm. This region is a reference sight of the stereo camera and tereo vision baseline is based on horizontal configuration. The block matching technique is briefly described with the performance of its output. The disparity mapping is generated by the algorithm with the reference to the left image coordinate. The algorithm uses Sum of Absolute Differences (SAD) which is developed using Matlab software.

关键词： Stereo vision disparity mapping region of interest epipolar line block matching algorithm

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A Hybrid block matching Motion Estimation Approach for Fractal Video Compression

A Hybrid Block Matching Motion Estimation Approach for Fract...

引用

International Conference on Circuits, Power and Computing Technologies

作者： S. G. Farkade S.D. Kamble P.G. Student Dept. Comp. Technology .Yeshwantrao Chavan College of Engg. & Tech. Nagpur India Dept. Comp. Technology Yeshwantrao Chavan College of Engg. & Tech Nagpur India

ISBN: (纸本)9781467349215

Fractal video compression is an attractive technique for video coding due to its distinct features and low bit rate video application. Fractal video compression is based on self similarity concept just as in image compression. Fractal video compression requires more computational complexity for reducing this computational complexity different techniques has been employed. This paper proposed fractal video compression using block matching motion estimation techniques that is a new hybrid technology consist of efficient three step search and cross hexagonal search. Efficient three step search requires lesser search points and getting good result in terms of compression ratio, time complexity than three step search . new three step search, Diamond and four step search, Cross Hexagonal search requires the lesser search points and obtained the good result than novel and enhanced hexagonal search.

关键词： block matching algorithm motion vector Video compression motion estimation motion compensation

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