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 ...
详细信息
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.
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 VLI...
详细信息
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.
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 stabi...
详细信息
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.
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 ...
详细信息
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.
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 visi...
详细信息
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.
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 c...
详细信息
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.
作者：
Gong, DHe, YTsinghua Univ
Dept Elect Engn State Key Lab Microwave & Digital Commun Beijing 100084 Peoples R China
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 ...
详细信息
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.
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 h...
详细信息
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.
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 usi...
详细信息
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 blockmatching 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.
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 com...
详细信息
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 blockmatching 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.
暂无评论