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Computer analysis of images and patterns : proceedings of the ... International Conference on Automatic Image Processing. International Conference on Automatic Image Processing最新文献

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An off-line large vocabulary hand-written Chinese character recognizer 离线大词汇手写汉字识别器
Computer analysis of images and patterns : proceedings of the ... International Conference on Automatic Image Processing. International Conference on Automatic Image Processing Pub Date : 1997-10-26 DOI: 10.1109/ICIP.1997.632106
P. Wong, Chorkin Chan
{"title":"An off-line large vocabulary hand-written Chinese character recognizer","authors":"P. Wong, Chorkin Chan","doi":"10.1109/ICIP.1997.632106","DOIUrl":"https://doi.org/10.1109/ICIP.1997.632106","url":null,"abstract":"An off-line hand-written Chinese character recognizer based on contextual vector quantization (CVQ) supporting a vocabulary of 4616 Chinese characters, alphanumerics and punctuation symbols has been reported. Trained with a sample for each character from each of 100 writers and tested on texts of 160000 characters written by another 200 writers, the average recognition rate is 77.2%. Two statistical language models have been investigated in this study. Their performance in terms of their capabilities in upgrading the recognition rate by 8.8% and 12.0% respectively when used as post-processors of the recognizer are reported.","PeriodicalId":92344,"journal":{"name":"Computer analysis of images and patterns : proceedings of the ... International Conference on Automatic Image Processing. International Conference on Automatic Image Processing","volume":"62 5 1","pages":"324-327 vol.3"},"PeriodicalIF":0.0,"publicationDate":"1997-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79139570","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: 1
Prediction based on Boolean filters for multiresolution lossless image compression 基于布尔滤波器的多分辨率无损图像压缩预测
Computer analysis of images and patterns : proceedings of the ... International Conference on Automatic Image Processing. International Conference on Automatic Image Processing Pub Date : 1997-10-26 DOI: 10.1109/ICIP.1997.638746
D. Petrescu, M. Gabbouj
{"title":"Prediction based on Boolean filters for multiresolution lossless image compression","authors":"D. Petrescu, M. Gabbouj","doi":"10.1109/ICIP.1997.638746","DOIUrl":"https://doi.org/10.1109/ICIP.1997.638746","url":null,"abstract":"In this paper Boolean filters and a variation of these, FIR-Boolean hybrid filters are proposed for realizing the prediction stages of a multiresolution lossless image compression structure. Optimal and adaptive Boolean filters are used for prediction and the proposed predictors performance is compared to the performance of other lossless multiresolution methods: the hierarchical interpolation scheme (HINT) and the S+P transform.","PeriodicalId":92344,"journal":{"name":"Computer analysis of images and patterns : proceedings of the ... International Conference on Automatic Image Processing. International Conference on Automatic Image Processing","volume":"212 1","pages":"290-293 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1997-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79420473","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: 7
Implementations of on sensor image compression and comparisons between pixel and column parallel architectures 传感器图像压缩的实现及像素和列并行架构的比较
Computer analysis of images and patterns : proceedings of the ... International Conference on Automatic Image Processing. International Conference on Automatic Image Processing Pub Date : 1997-10-26 DOI: 10.1109/ICIP.1997.638736
K. Aizawa, T. Hamamoto, Y. Ohtsuka, M. Hatori, M. Abe
{"title":"Implementations of on sensor image compression and comparisons between pixel and column parallel architectures","authors":"K. Aizawa, T. Hamamoto, Y. Ohtsuka, M. Hatori, M. Abe","doi":"10.1109/ICIP.1997.638736","DOIUrl":"https://doi.org/10.1109/ICIP.1997.638736","url":null,"abstract":"In order to enhance performance of an image sensor, we have been investigating a novel integration of compression and sensing. By this integration, the image signal that has to be readout from the sensor is significantly reduced. Thus, the integration can consequently leads to high pixel rate sensing. The compression scheme we make use of is conditional replenishment that detects and encodes moving areas. We have developed prototypes based on two different architectures, that are pixel parallel and column parallel architectures. We present the two prototypes and their comparisons, and show the results obtained by them.","PeriodicalId":92344,"journal":{"name":"Computer analysis of images and patterns : proceedings of the ... International Conference on Automatic Image Processing. International Conference on Automatic Image Processing","volume":"16 1","pages":"258-261 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1997-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84339230","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: 7
Adaptive axes-generation algorithm for 3D tubular structures 三维管状结构自适应轴生成算法
Computer analysis of images and patterns : proceedings of the ... International Conference on Automatic Image Processing. International Conference on Automatic Image Processing Pub Date : 1997-10-26 DOI: 10.1109/ICIP.1997.638692
R. Swift, K. Ramaswamy, W. Higgins
{"title":"Adaptive axes-generation algorithm for 3D tubular structures","authors":"R. Swift, K. Ramaswamy, W. Higgins","doi":"10.1109/ICIP.1997.638692","DOIUrl":"https://doi.org/10.1109/ICIP.1997.638692","url":null,"abstract":"Three-Dimensional (3D) radiologic images are widely used to assess the condition of thin tubular structures, such as the pulmonary airways, coronary arteries, and colon. Precise 3D central axes of these structures are needed, however, for accurate quantization. Commonly employed manual-axes identification techniques are time-consuming and error-prone. Recently proposed automated techniques do not adequately exploit the available gray-scale or anatomic structural information and they are also prone to errors. The authors propose a method for computing the precise central axes of branching structures contained in 3D images. The method is robust to data anisotropy and uses true gray-scale information. These axes can then be used for automated navigation and assessment in a virtual-endoscopic system. The authors present the application of their method to a human lung-cancer case.","PeriodicalId":92344,"journal":{"name":"Computer analysis of images and patterns : proceedings of the ... International Conference on Automatic Image Processing. International Conference on Automatic Image Processing","volume":"34 1","pages":"136-139 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1997-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85474025","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
Spatiotemporal subband/wavelet coding of video with object-based motion information 基于物体运动信息的视频时空子带/小波编码
Computer analysis of images and patterns : proceedings of the ... International Conference on Automatic Image Processing. International Conference on Automatic Image Processing Pub Date : 1997-10-26 DOI: 10.1109/ICIP.1997.638850
Soo-Chul Han, J. Woods
{"title":"Spatiotemporal subband/wavelet coding of video with object-based motion information","authors":"Soo-Chul Han, J. Woods","doi":"10.1109/ICIP.1997.638850","DOIUrl":"https://doi.org/10.1109/ICIP.1997.638850","url":null,"abstract":"We present a novel object-based spatiotemporal (3-D) subband/wavelet coding scheme for very low bit-rate video compression. First, the image sequence is segmented into objects based on motion and color. The objects are then independently decomposed by subband/wavelet analysis, both in the temporal and spatial domain. The temporal analysis is greatly facilitated over existing methods by the object-based representation. Each object's subband/wavelet coefficients are then quantized according to a bit allocation scheme based on the generalised BFOS algorithm. Simulations at very low bit-rates indicate competitive performance to classical motion-compensated predictive (MCP) coding schemes, while allowing the flexibility of frame-rate scalability.","PeriodicalId":92344,"journal":{"name":"Computer analysis of images and patterns : proceedings of the ... International Conference on Automatic Image Processing. International Conference on Automatic Image Processing","volume":"70 1","pages":"629-632 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1997-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85971400","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: 13
Global optimization of multiplexed video encoders 多路视频编码器的全局优化
Computer analysis of images and patterns : proceedings of the ... International Conference on Automatic Image Processing. International Conference on Automatic Image Processing Pub Date : 1997-10-26 DOI: 10.1109/ICIP.1997.647785
M. Balakrishnan, R. Cohen
{"title":"Global optimization of multiplexed video encoders","authors":"M. Balakrishnan, R. Cohen","doi":"10.1109/ICIP.1997.647785","DOIUrl":"https://doi.org/10.1109/ICIP.1997.647785","url":null,"abstract":"An algorithm is presented for increasing the overall video quality of multiple variable rate video encoders multiplexed onto a single constant bit-rate channel. This enables an encoder, that is processing complex video, to use more of the channel bandwidth than an encoder that is compressing less complex video. The encoder rates are continually adapted. A rate controller determines the channel rate for each encoder as well as the target rate allocated to individual pictures encoded by the encoders. The target rates for individual pictures are computed in order to maintain constant quality across encoders while the encoder channel rates are derived so as to avoid encoder and decoder buffer underflow and overflow.","PeriodicalId":92344,"journal":{"name":"Computer analysis of images and patterns : proceedings of the ... International Conference on Automatic Image Processing. International Conference on Automatic Image Processing","volume":"50 1","pages":"377-380 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1997-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76595726","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: 17
Constrained image restoration with a multinomial prior 基于多项式先验的约束图像恢复
Computer analysis of images and patterns : proceedings of the ... International Conference on Automatic Image Processing. International Conference on Automatic Image Processing Pub Date : 1997-10-26 DOI: 10.1109/ICIP.1997.647754
B. Calder, L. Linnett, D. Carmichael
{"title":"Constrained image restoration with a multinomial prior","authors":"B. Calder, L. Linnett, D. Carmichael","doi":"10.1109/ICIP.1997.647754","DOIUrl":"https://doi.org/10.1109/ICIP.1997.647754","url":null,"abstract":"A Bayesian image processing model is proposed based on, a Markovian multinomial prior. The technique has application in texture segmentation where its introduction of spatial context can improve segmentation accuracy by 60%. Other applications include general image restoration where 18 dB SNR improvement is possible. In addition, the computational complexity of the system is low, making it ideal as a component part of other systems. We show quantitative experiments to illustrate the performance of the algorithm, and groundtruth examples are provided to show the effect in practice.","PeriodicalId":92344,"journal":{"name":"Computer analysis of images and patterns : proceedings of the ... International Conference on Automatic Image Processing. International Conference on Automatic Image Processing","volume":"51 1","pages":"259-262 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1997-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81013553","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
Estimation of the chin and cheek contours for precise face model adaptation 估计下巴和脸颊轮廓精确的人脸模型适应
Computer analysis of images and patterns : proceedings of the ... International Conference on Automatic Image Processing. International Conference on Automatic Image Processing Pub Date : 1997-10-26 DOI: 10.1109/ICIP.1997.632098
M. Kampmann
{"title":"Estimation of the chin and cheek contours for precise face model adaptation","authors":"M. Kampmann","doi":"10.1109/ICIP.1997.632098","DOIUrl":"https://doi.org/10.1109/ICIP.1997.632098","url":null,"abstract":"For semantic coding of videophone sequences at very low bit rates, the adaptation of a face model to automatically estimate facial features is necessary. In this contribution, an algorithm for the automatic estimation of the chin and cheek contours of a person is presented. The chin and cheeks are represented by a deformable template consisting of parabolas. Cost functions are established and minimized to find the best fit of the template to the chin and cheek contours of the person. In all examined frames of the videophone sequences \"Akiyo\" and \"Claire\", the manually determined real contour of the chin and the cheeks is approximated by the estimated contours with good accuracy. In more than 60% of all frames, no deviation between the real contours and the estimated contours occurs.","PeriodicalId":92344,"journal":{"name":"Computer analysis of images and patterns : proceedings of the ... International Conference on Automatic Image Processing. International Conference on Automatic Image Processing","volume":"15 1","pages":"300-303 vol.3"},"PeriodicalIF":0.0,"publicationDate":"1997-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81978899","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: 32
Joint control of MPEG VBR video over ATM networks ATM网络上MPEG VBR视频的联合控制
Computer analysis of images and patterns : proceedings of the ... International Conference on Automatic Image Processing. International Conference on Automatic Image Processing Pub Date : 1997-10-26 DOI: 10.1109/ICIP.1997.632189
L. Teixeira, Teresa Andrade, Vitor Teixeira
{"title":"Joint control of MPEG VBR video over ATM networks","authors":"L. Teixeira, Teresa Andrade, Vitor Teixeira","doi":"10.1109/ICIP.1997.632189","DOIUrl":"https://doi.org/10.1109/ICIP.1997.632189","url":null,"abstract":"In video applications, digital encoding techniques are frequently associated to the use of compression algorithms. Compression algorithms such as the MPEG 2 standard allow economies in transmission bandwidth, while providing a service with a quality similar or better to the current analogue systems. The reduction in the number of bits necessary to represent a given sequence is achieved by exploiting spatial and temporal redundancy in the original video sequences. The number of bits necessary to achieve a given picture quality level will be variable because the redundancy in the original sequence is also variable. This means that compression algorithms such as the MPEG 2 standard will generate variable bit rate (VBR) encoded bit streams if a constant quality is to be obtained. The goal of the work described in this paper is to develop dynamic multiplexing algorithms to be implemented at the user terminal equipment and to study the potential benefits of jointly controlling the bit rate of several encoders and the channel bit rate. The bit rate of the VBR transmission channel is constrained by leaky bucket policing functions. The source bit rate is determined and controlled on a picture basis by the proposed dynamic bandwidth allocation algorithm with the objective of maintaining a minimum level of quality among all video sources using always the least possible bandwidth and without violating the traffic contract.","PeriodicalId":92344,"journal":{"name":"Computer analysis of images and patterns : proceedings of the ... International Conference on Automatic Image Processing. International Conference on Automatic Image Processing","volume":"10 1","pages":"586-589 vol.3"},"PeriodicalIF":0.0,"publicationDate":"1997-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85518641","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: 5
An uncertainty analysis of some real functions for image processing applications 图像处理中一些实际函数的不确定度分析
Computer analysis of images and patterns : proceedings of the ... International Conference on Automatic Image Processing. International Conference on Automatic Image Processing Pub Date : 1997-10-26 DOI: 10.1109/ICIP.1997.632210
J. Bloom, T. Reed
{"title":"An uncertainty analysis of some real functions for image processing applications","authors":"J. Bloom, T. Reed","doi":"10.1109/ICIP.1997.632210","DOIUrl":"https://doi.org/10.1109/ICIP.1997.632210","url":null,"abstract":"There are many benefits to be gained in image processing and compression by the use of analyzing functions which are local in both space and spatial frequency. It is often assumed that these benefits are in some way proportional to the degree of joint locality of the functions being used. Within the limits imposed by the uncertainty principle, there can be great variation in this joint locality across different local function families. While there is no generally accepted joint locality metric appropriate for visual applications, Gabor's joint uncertainty is often cited to justify the use of a set of functions. It has been shown that complex Gabor functions optimize this metric. There is some debate however regarding which, of the restricted class of real functions, has the lowest joint uncertainty. In this paper we examine three families of real functions and directly evaluate the Gabor metric for joint uncertainty. In contrast to previous attempts to prove the optimality of any one function, this analysis provides an explicit numerical basis for comparison of these real functions.","PeriodicalId":92344,"journal":{"name":"Computer analysis of images and patterns : proceedings of the ... International Conference on Automatic Image Processing. International Conference on Automatic Image Processing","volume":"4 1","pages":"670-673 vol.3"},"PeriodicalIF":0.0,"publicationDate":"1997-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84106011","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: 13
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