发布求助
文献互助 智能选刊 最新文献

2007 5th International Symposium on Image and Signal Processing and Analysis最新文献

筛选
英文 中文
On the Sensitivity of Two-Channel IIR Filter Banks with Variable Crossover Frequency 变交叉频率双通道IIR滤波器组灵敏度研究
2007 5th International Symposium on Image and Signal Processing and Analysis Pub Date : 2007-11-19 DOI: 10.1109/ISPA.2007.4383669
J. Ćertić, L. Milic
{"title":"On the Sensitivity of Two-Channel IIR Filter Banks with Variable Crossover Frequency","authors":"J. Ćertić, L. Milic","doi":"10.1109/ISPA.2007.4383669","DOIUrl":"https://doi.org/10.1109/ISPA.2007.4383669","url":null,"abstract":"In this paper, we investigate the sensitivities of the magnitude responses for the two classes of two-channel IIR filter banks. The term class I denotes the IIR filter pair implemented as a parallel connection of two all-pass filters, whereas class II stays for the tapped cascaded interconnection of two identical all-pass filters. A simple tuning scheme that shifts the crossover frequency of the start-up IIR half-band filter pair to the desired location has been introduced recently. In this paper, we concentrate on the effects, which appear when the finite-precision arithmetic is used to implement the tuning formulae. For the two classes of two-channel IIR filter banks, we demonstrate by means of examples the sensitivities of the magnitude frequency characteristics, and show the effects of those sensitivities to the accuracy of the tuning procedure.","PeriodicalId":112420,"journal":{"name":"2007 5th International Symposium on Image and Signal Processing and Analysis","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134600259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
A Mathematical Model to Estimate Out of Focus Blur 估计失焦模糊的数学模型
2007 5th International Symposium on Image and Signal Processing and Analysis Pub Date : 2007-11-19 DOI: 10.1109/ISPA.2007.4383705
M. Moghaddam
{"title":"A Mathematical Model to Estimate Out of Focus Blur","authors":"M. Moghaddam","doi":"10.1109/ISPA.2007.4383705","DOIUrl":"https://doi.org/10.1109/ISPA.2007.4383705","url":null,"abstract":"Blur identification is one of the most important parts of image restoration. The most conventional blur that occurs in images is out of focus, which is generated because of lens defocus. In this paper, a new method is presented to estimate out of focus blur parameters robustly. This method is based on mathematical modeling of zero crossing in log of Fourier spectrum. We have presented a formula to calculate out of focus blur parameters using circular hough transform and statistical measures. Experimental results show the error tolerance of the method is about 2% and this works on noisy images with SNR ges 55 dB, robustly.","PeriodicalId":112420,"journal":{"name":"2007 5th International Symposium on Image and Signal Processing and Analysis","volume":"12 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133461740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 36
A Kind VLSI Design of Vector Quantization Algorithm for Image Compression 一种图像压缩矢量量化算法的VLSI设计
2007 5th International Symposium on Image and Signal Processing and Analysis Pub Date : 2007-11-19 DOI: 10.1109/ISPA.2007.4383709
Xiang Wang, Wanli Pei, Wei Lei, Xuemei Yu, Ikdong Kim, W. Wolf
{"title":"A Kind VLSI Design of Vector Quantization Algorithm for Image Compression","authors":"Xiang Wang, Wanli Pei, Wei Lei, Xuemei Yu, Ikdong Kim, W. Wolf","doi":"10.1109/ISPA.2007.4383709","DOIUrl":"https://doi.org/10.1109/ISPA.2007.4383709","url":null,"abstract":"The VLSI architecture is simulated and verified on a FPGA device successfully. The design is described at RTL level using Verilog HDL. Based on Altera Cyclone device EP1C12Q240C8, synthesis and post-simulation are conducted with Quartus II 4.2 and Modelsim SE Plus 5.8b. For the synthesized device 38% of the logic resource and 20% of the memory is used. The maximum clock frequency is 100.52 MHz. A new fast search algorithm for VQ which is appropriate for hardware implementation is proposed in this paper. In the new search algorithm, the codebook and the input image vectors are classified into three groups: horizontal (H), vertical (V) and even (E). The algorithm is simulated functionally and verified on FPGA. Verification result indicates that the new searching algorithm is more effective for hardware implementation and has higher speed. When the frequency is 50 MHz, the device can compress a 512times512 grayscale still image in 10 ms. The compression ratio is 16:1 and the quality of the reconstructed image is high. Furthermore, with some modification the encoding system can easily handle real-time video even color images.","PeriodicalId":112420,"journal":{"name":"2007 5th International Symposium on Image and Signal Processing and Analysis","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116539877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Low-Complexity Constant Multiplication Using Carry-Save Arithmetic for High-Speed Digital Filters 高速数字滤波器的低复杂度常数乘法免携带算法
2007 5th International Symposium on Image and Signal Processing and Analysis Pub Date : 2007-11-19 DOI: 10.1109/ISPA.2007.4383692
O. Gustafsson, L. Wanhammar
{"title":"Low-Complexity Constant Multiplication Using Carry-Save Arithmetic for High-Speed Digital Filters","authors":"O. Gustafsson, L. Wanhammar","doi":"10.1109/ISPA.2007.4383692","DOIUrl":"https://doi.org/10.1109/ISPA.2007.4383692","url":null,"abstract":"In this work we discuss the realization of constant multiplication using a minimum number of carry-save adders. We consider both non-redundant and carry-save representation for the input data. For both cases we present all possible interconnection topologies, using up to six and five adders, respectively. These are sufficient to realize constant multiplications for all coefficients with a wordlength up to 19 bits.","PeriodicalId":112420,"journal":{"name":"2007 5th International Symposium on Image and Signal Processing and Analysis","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122223344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Rotation Angle Estimation Algorithms for Textures and Their Real-Time Implementation on the FU-SmartCam 纹理旋转角度估计算法及其在FU-SmartCam上的实时实现
2007 5th International Symposium on Image and Signal Processing and Analysis Pub Date : 2007-11-19 DOI: 10.1109/ISPA.2007.4383739
C. Ulas, S. Demir, O. Toker, K. Fidanboylu
{"title":"Rotation Angle Estimation Algorithms for Textures and Their Real-Time Implementation on the FU-SmartCam","authors":"C. Ulas, S. Demir, O. Toker, K. Fidanboylu","doi":"10.1109/ISPA.2007.4383739","DOIUrl":"https://doi.org/10.1109/ISPA.2007.4383739","url":null,"abstract":"In this paper, we study rotation angle estimation algorithms for textures and discuss their real-time implementation on the FU-SmartCam. Rotation angle estimation for textures is closely related to the weft-straightening problem encountered in the textile industry. Earlier weft-straightening machines were based on simpler sensors and hardware, but with the increased complexity of fabric types, and demand for faster and more accurate machines, the whole industry started to switch to real-time machine vision based systems. For example, one of the leading companies in this area, Erhardt+Leimer, started to implement realtime machine vision systems based on the tattile smart camera. In this work, we both study rotation angle estimation algorithms for textures, and their real-time implementation on the locally developed Fatih University smart camera (FU-SmartCam). We also compare the FU-SmartCam with the tattile smart camera used in the Erhardt+Leimer system, both in terms of hardware and ease of prototyping.","PeriodicalId":112420,"journal":{"name":"2007 5th International Symposium on Image and Signal Processing and Analysis","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123882033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Properties of a Natural Ordering Relation for Octagonal Neighborhood Sequences 八边形邻域序列的自然序关系的性质
2007 5th International Symposium on Image and Signal Processing and Analysis Pub Date : 2007-11-19 DOI: 10.1109/ISPA.2007.4383684
A. Fazekas, A. Hajdu, L. Hajdu
{"title":"Properties of a Natural Ordering Relation for Octagonal Neighborhood Sequences","authors":"A. Fazekas, A. Hajdu, L. Hajdu","doi":"10.1109/ISPA.2007.4383684","DOIUrl":"https://doi.org/10.1109/ISPA.2007.4383684","url":null,"abstract":"Neighborhood sequences play an important role in several branches of discrete geometry and image processing. The literature of such sequences is very wide. In this paper we give a survey on results on a natural partial ordering relation for generalized nD octagonal neighborhood sequences. As this ordering does not have nice properties for each subset of such neighborhood sequences, we also investigate another relation and provide several properties for it. We put special emphasize on neighborhood sequences which generate metrics on Zn. In certain applications it can be useful to compare any two neighborhood sequences -however, none of these partial orderings is a total ordering. For this purpose, we investigate a norm-like concept, called velocity, which fits very well to the natural ordering relation. We also define a metric for neighborhood sequences, and investigate its properties.","PeriodicalId":112420,"journal":{"name":"2007 5th International Symposium on Image and Signal Processing and Analysis","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125527971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Automatic segmentation of low resolution fetal cardiac data using snakes with shape priors 具有形状先验的蛇形图像对低分辨率胎儿心脏数据的自动分割
2007 5th International Symposium on Image and Signal Processing and Analysis Pub Date : 2007-11-19 DOI: 10.1109/ISPA.2007.4383751
I. Dindoyal, T. Lambrou, Jing Deng, Andrew Todd-Pokropek
{"title":"Automatic segmentation of low resolution fetal cardiac data using snakes with shape priors","authors":"I. Dindoyal, T. Lambrou, Jing Deng, Andrew Todd-Pokropek","doi":"10.1109/ISPA.2007.4383751","DOIUrl":"https://doi.org/10.1109/ISPA.2007.4383751","url":null,"abstract":"This paper presents a level set deformable model to segment all four chambers of the fetal heart simultaneously. We show its results in 2D on 53 images taken from only 8 datasets. Due to our lack of sufficient data we built only a mean template from the training data instead of a full active shape model. Using rigid registration the template was registered to unseen images and the snakes were guided by individual chamber priors as they evolved in unison to segment missing cardiac structures in the presence of high noise. Using a leave one out approach most of the segmentation errors are within 3 pixels of manually traced contours.","PeriodicalId":112420,"journal":{"name":"2007 5th International Symposium on Image and Signal Processing and Analysis","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124425980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Theory of Neighborhood Sequences on Hexagonal Grids 六边形网格上的邻域序列理论
2007 5th International Symposium on Image and Signal Processing and Analysis Pub Date : 2007-11-19 DOI: 10.1109/ISPA.2007.4383725
B. Nagy
{"title":"Theory of Neighborhood Sequences on Hexagonal Grids","authors":"B. Nagy","doi":"10.1109/ISPA.2007.4383725","DOIUrl":"https://doi.org/10.1109/ISPA.2007.4383725","url":null,"abstract":"In this paper distances based on neighborhood sequences in hexagonal grid are analysed. From every vertex of the grid one can step to various neighbors directed by a neighborhood sequence, which allows to vary the used neighborhood relations step by step. The distances of two vertices are defined as the lengths of shortest paths between them. Theoretic results, such as algorithm to provide a shortest path, computing the distance and properties of distances are shown. Necessary and sufficient condition to have metric distance is proven. Digital circles and discs are described as well.","PeriodicalId":112420,"journal":{"name":"2007 5th International Symposium on Image and Signal Processing and Analysis","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123290210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Edge Gradient Based Fast Inter Motion Estimation for H.264/AVC 基于边缘梯度的H.264/AVC快速运动间估计
2007 5th International Symposium on Image and Signal Processing and Analysis Pub Date : 2007-11-19 DOI: 10.1109/ISPA.2007.4383663
Zhenyu Liu, Yang Song, Yiqing Huang, Lingfeng Li, S. Goto, T. Ikenaga
{"title":"Edge Gradient Based Fast Inter Motion Estimation for H.264/AVC","authors":"Zhenyu Liu, Yang Song, Yiqing Huang, Lingfeng Li, S. Goto, T. Ikenaga","doi":"10.1109/ISPA.2007.4383663","DOIUrl":"https://doi.org/10.1109/ISPA.2007.4383663","url":null,"abstract":"H.264/AVC coding standard processes variable block size (VBS) motion estimation(ME) on multiple reference frames (MRF) to improve the coding gain. However, the computation is also increased in proportion to the product of the reference frame number and the inter modes. Through mathematical analysis, it is illustrated that the motion-compensated prediction error is mainly determined by the edge gradient amplitude. The image block being rich of texture and sharp edges contains much high frequency signal and this nature makes VBS MRF ME essential. The spatial homogeneity of a block is decided by its maximum edge gradient and its threshold for the edge gradient detection, which is 5 times quantization parameter (QP), is derived from rate-distortion theory. For the homogenous block, its ME computation for the futile reference frames and inter modes can be saved. Through evaluating the edge gradient, the block motion speed can be estimated to reduce the search area of integer ME. Based on the homogeneity of one 8times8 block, its Lagrangian Multiplier is also optimized to improve the coding quality. Moreover, we also provide a fast 'skip_mb' detection algorithm based on Hadamard coefficients and the current QP. Experimental results show that 61.4%-88.9% computation can be saved by our approaches with the competitive coding quality as the exhaustive search algorithm.","PeriodicalId":112420,"journal":{"name":"2007 5th International Symposium on Image and Signal Processing and Analysis","volume":"11 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124234214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
A machine vision system with an irregular imaging function 具有不规则成像功能的机器视觉系统
2007 5th International Symposium on Image and Signal Processing and Analysis Pub Date : 2007-11-19 DOI: 10.1109/ISPA.2007.4383737
Zhenwei Su, Jinwei Wang, Ming-Deng Huang, Chunhua Gao, M. Petrou
{"title":"A machine vision system with an irregular imaging function","authors":"Zhenwei Su, Jinwei Wang, Ming-Deng Huang, Chunhua Gao, M. Petrou","doi":"10.1109/ISPA.2007.4383737","DOIUrl":"https://doi.org/10.1109/ISPA.2007.4383737","url":null,"abstract":"Traditional machine vision systems sample images at a fixed resolution and a presetting speed in one inspection. When detecting small defects in a large background, there is usually a large amount of redundancy in the image data. To solve this problem, a machine vision system with an irregular imaging function is presented in the paper. The system can irregularly sample images with a high resolution in the defect area and a low resolution in the background area, which reduces the total data in image processing and increases the speed and accuracy of real-time inspection significantly.","PeriodicalId":112420,"journal":{"name":"2007 5th International Symposium on Image and Signal Processing and Analysis","volume":"164 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132671686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信