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Fourth International Conference on Image and Graphics (ICIG 2007)最新文献

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Estimation of Net Primary Production of the Kii Peninsula Using Terra/MODIS Data 利用Terra/MODIS数据估算Kii半岛净初级产量
Fourth International Conference on Image and Graphics (ICIG 2007) Pub Date : 2007-08-22 DOI: 10.1109/ICIG.2007.85
Y. Cen, K. Muramatsu, Liangpei Zhang
{"title":"Estimation of Net Primary Production of the Kii Peninsula Using Terra/MODIS Data","authors":"Y. Cen, K. Muramatsu, Liangpei Zhang","doi":"10.1109/ICIG.2007.85","DOIUrl":"https://doi.org/10.1109/ICIG.2007.85","url":null,"abstract":"Precise estimations of zonal net primary production (NPP) are vital for understanding global carbon circulation. To estimate NPP, light use efficiency (LUE) model using normalized differential vegetation index (NDVI) has been used mainly. NDVI is obtained from red and near-infrared channels only, however, recent sensors onboard satellites always have hyper-multi-spectral channels; In order to use these data effectively, which include more details about land cover, a vegetation index based on pattern decomposition method (VIPD) has been set up to estimate NPP. The present study used 2001 Terra/MODIS (moderate resolution imaging spectroradiometer) data for the Kii Peninsula, which is mainly covered by temperate forest. To validate the proposed method, we compared the satellite data-based NPP values for the evergreen with values derived from land-survey data. The proposed method estimated the annual NPP of a temperate forest on Yoshino Mountain to be 1.52plusmn0.39 kg CO2/m2/year, which agreed with the ground-survey result of 1.50plusmn0.75 kg CO2/m2/year, within the algorithm error. An average zonal NPP of 1.55plusmn0.40 kg CO2/m2/year was calculated for the whole land region from 32deg30' to 36deg24' N latitude, 134deg30' to 137deg06' E longitude with an area of 3.94 times 104 km2.","PeriodicalId":367106,"journal":{"name":"Fourth International Conference on Image and Graphics (ICIG 2007)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117222742","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 Extraction and Matching of Control Points for Distortion Correction in Star-Background Image 星背景图像畸变校正控制点的自动提取与匹配
Fourth International Conference on Image and Graphics (ICIG 2007) Pub Date : 2007-08-22 DOI: 10.1109/ICIG.2007.60
Liu Zun-yan, Zhao Dan-pei, Jiang Zhi-guo, Yang Jun-li
{"title":"Automatic Extraction and Matching of Control Points for Distortion Correction in Star-Background Image","authors":"Liu Zun-yan, Zhao Dan-pei, Jiang Zhi-guo, Yang Jun-li","doi":"10.1109/ICIG.2007.60","DOIUrl":"https://doi.org/10.1109/ICIG.2007.60","url":null,"abstract":"Usually a typical geometry distortion will occur when images are captured because of inaccuracy of axis distance of lens in the optical camera lens. The problem is also obvious in star-background images, which necessitate distortion correction for subsequent analysis. In this paper, a new method based on star- point matching is proposed to extract and match automatically control points in star-background images. We acquire automatically control point pairs using point matching between points in pre-corrected image and points in ideal image which relies on the catalog. This work extends applied domain of Hausdorff Distance (HD) which is one of commonly used measures for object matching. In our experiments, least Trimmed Square HD (LTS-HD) was used in point matching, and the result is effective.","PeriodicalId":367106,"journal":{"name":"Fourth International Conference on Image and Graphics (ICIG 2007)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123952585","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: 10
Connectivity Compression for Stripified Triangle Meshes Using Basic Strips 使用基本条的连通性压缩条纹三角形网格
Fourth International Conference on Image and Graphics (ICIG 2007) Pub Date : 2007-08-22 DOI: 10.1109/ICIG.2007.76
Hao Huang, Fan Zhou
{"title":"Connectivity Compression for Stripified Triangle Meshes Using Basic Strips","authors":"Hao Huang, Fan Zhou","doi":"10.1109/ICIG.2007.76","DOIUrl":"https://doi.org/10.1109/ICIG.2007.76","url":null,"abstract":"This paper presents a new triangle meshes compression algorithm, which encodes connectivity information between vertex chains in the meshes that are already stripified. The algorithm builds up basic strips based on the vertex chains of the original strips at first. The information of redundant edges is implicit hence the only information need to encode is about absent edges. The proposed algorithm provides a new representation that is guaranteed to encode connectivity information of any meshes in less than 2 bits/T, and in 1.2 bits/T on average in the experiment results using FTSG. In the experiments, the method was proved to have good performance.","PeriodicalId":367106,"journal":{"name":"Fourth International Conference on Image and Graphics (ICIG 2007)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129689543","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
An Efficient Algorithm for Motion Estimation with Multiple Reference Frames in H.264/AVC H.264/AVC中多参考帧运动估计的高效算法
Fourth International Conference on Image and Graphics (ICIG 2007) Pub Date : 2007-08-22 DOI: 10.1109/ICIG.2007.46
Zhengning Wang, Jun Yang, Qiang Peng, Changqian Zhu
{"title":"An Efficient Algorithm for Motion Estimation with Multiple Reference Frames in H.264/AVC","authors":"Zhengning Wang, Jun Yang, Qiang Peng, Changqian Zhu","doi":"10.1109/ICIG.2007.46","DOIUrl":"https://doi.org/10.1109/ICIG.2007.46","url":null,"abstract":"Multiple reference frames motion compensation is one of the new features adopted in H.264/AVC to improve the coding efficiency of inter frames. However, the computational complexity of multi-reference frames motion estimation (MRME) is increased in proportion to the number of searched reference frames. This paper presents a novel scheme to reduce the complexity of MRME. In order to speed up the MRME process, the following factors such as frame rate, motion activity and search range are considered. Experiment results verify that the proposed algorithm can reduce the number of reference frame from 5 to 1.6 and save the MRME time by 90.2% on average respectively with little degradation of coding efficiency.","PeriodicalId":367106,"journal":{"name":"Fourth International Conference on Image and Graphics (ICIG 2007)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129364003","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
Video Abstraction Based on Relational Graphs 基于关系图的视频抽象
Fourth International Conference on Image and Graphics (ICIG 2007) Pub Date : 2007-08-22 DOI: 10.1109/ICIG.2007.185
Sulan Zhai, B. Luo, Jin Tang, Chunyan Zhang
{"title":"Video Abstraction Based on Relational Graphs","authors":"Sulan Zhai, B. Luo, Jin Tang, Chunyan Zhang","doi":"10.1109/ICIG.2007.185","DOIUrl":"https://doi.org/10.1109/ICIG.2007.185","url":null,"abstract":"Video abstraction plays an important role in video browsing, video indexing, video retrieval and other video applications. In the paper, an automatic video abstraction method is developed based on relational graph representations. Firstly, a relational graph is constructed for all the frames in a video sequence. Secondly, the graph is partitioned into different connected subgraphs. Thirdly, Isomap is performed to reduce the dimensionality of the data set, and the output of Isomap is used as feature vector of the video frames. Lastly, a mixture model with model selection is introduced to generate the fine grain video abstraction with the centre of each clustering as the keyframes. Experiments are conducted on real world video sets with satisfying video abstraction results.","PeriodicalId":367106,"journal":{"name":"Fourth International Conference on Image and Graphics (ICIG 2007)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130224983","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
An Adaptive Diamond Searching Algorithm on Space-time Correlation 一种基于时空相关的自适应菱形搜索算法
Fourth International Conference on Image and Graphics (ICIG 2007) Pub Date : 2007-08-22 DOI: 10.1109/ICIG.2007.36
Wang Yan-ni, Fan Yang-yu
{"title":"An Adaptive Diamond Searching Algorithm on Space-time Correlation","authors":"Wang Yan-ni, Fan Yang-yu","doi":"10.1109/ICIG.2007.36","DOIUrl":"https://doi.org/10.1109/ICIG.2007.36","url":null,"abstract":"An adaptive diamond search algorithm is proposed for motion estimation algorithm of H.264 video compression standard, owing to the relationship between the quality of video and the running time of algorithm, using the motion vector of space-time correlation and center biased distribution in the neighboring images and in the same image. Based on the SAD of present point, forecast its motive type, reduce the searching range and numbers. Compared with other algorithms, experimental results showed that the time of motion estimation is reduced to 4ms and the PSNR is increased about 1.3dB by the adaptive diamond search algorithm.","PeriodicalId":367106,"journal":{"name":"Fourth International Conference on Image and Graphics (ICIG 2007)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125403421","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
Statistical Structure Analysis in MRI Brain Tumor Segmentation MRI脑肿瘤分割的统计结构分析
Fourth International Conference on Image and Graphics (ICIG 2007) Pub Date : 2007-08-22 DOI: 10.1109/ICIG.2007.173
Xiaoping Xuan, Q. Liao
{"title":"Statistical Structure Analysis in MRI Brain Tumor Segmentation","authors":"Xiaoping Xuan, Q. Liao","doi":"10.1109/ICIG.2007.173","DOIUrl":"https://doi.org/10.1109/ICIG.2007.173","url":null,"abstract":"Automated MRI (Magnetic Resonance Imaging) brain tumor segmentation is a difficult task due to the variance and complexity of tumors. In this paper, a statistical structure analysis based tumor segmentation scheme is presented, which focuses on the structural analysis on both tumorous and normal tissues. Firstly, 3 kinds of features including intensity-based, symmetry-based and texture-based are extracted from structural elements. Then a classification technique using AdaBoost that learns by selecting the most discriminative features is proposed to classify the structural elements into normal tissues and abnormal tissues. Experimental results on 140 tumor-contained brain MR images achieve an average accuracy of 96.82% on tumor segmentation.","PeriodicalId":367106,"journal":{"name":"Fourth International Conference on Image and Graphics (ICIG 2007)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123276895","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: 96
Ultrasound Image Enhancement using Dynamic Filtering 超声图像的动态滤波增强
Fourth International Conference on Image and Graphics (ICIG 2007) Pub Date : 2007-08-22 DOI: 10.1109/ICIG.2007.182
Xiaoying Li, Dong C Liu
{"title":"Ultrasound Image Enhancement using Dynamic Filtering","authors":"Xiaoying Li, Dong C Liu","doi":"10.1109/ICIG.2007.182","DOIUrl":"https://doi.org/10.1109/ICIG.2007.182","url":null,"abstract":"This paper presents an adaptive image enhancement method through selected dynamic filtering based on speckle detection for ultrasound images. The main idea is to enhance the tissue structure and also smooth the speckle regions adoptively from pre-defined filters with certain filter characteristics. The criterion of speckle region is defined from a similarity value obtained from histogram matching between the histogram in the processing window and a reference one derived from a speckle area. Big similarity values means speckle pixels needed smoothing from lowpass filtering, and small values correspond to structure pixels which will be enhanced by highpass filters. All these filters can be implemented as dynamic filtering whose index is the similarity value for adoptively smoothing speckle for contrast enhancement or enhancing structure for better edge/boundary detection. Test images show that our new method can enhance tissue structure and also reduce speckle for better image quality.","PeriodicalId":367106,"journal":{"name":"Fourth International Conference on Image and Graphics (ICIG 2007)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116057191","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: 14
Full Search of Side-Information in Distributed Video Coding 分布式视频编码中侧信息的全搜索
Fourth International Conference on Image and Graphics (ICIG 2007) Pub Date : 2007-08-22 DOI: 10.1109/ICIG.2007.101
Yixuan Zhang, Ce Zhu
{"title":"Full Search of Side-Information in Distributed Video Coding","authors":"Yixuan Zhang, Ce Zhu","doi":"10.1109/ICIG.2007.101","DOIUrl":"https://doi.org/10.1109/ICIG.2007.101","url":null,"abstract":"Distributed video coding (DVC) has attracted increasing research efforts due to the requirements of low complexity encoders for portable wireless video communication devices. The recently proposed DVC scheme using Low-Density-Parity-Check-Accumulate (LDPCA) code with hash-based motion estimation at the decoder has achieved very good performance. However, there is still a performance gap compared with conventional video coding schemes. In this paper, we propose a scheme using a full search for side-information to obtain the best possible side- information at the decoder without hash or other extra bits, thus improving the coding efficiency. The simulation results validate the effectiveness of the proposed scheme with better rate-distortion performance compared with the original hash-based LDPCA scheme.","PeriodicalId":367106,"journal":{"name":"Fourth International Conference on Image and Graphics (ICIG 2007)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123830989","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
Fast Texture Mapping from a Single Frontal Image 从单个正面图像快速纹理映射
Fourth International Conference on Image and Graphics (ICIG 2007) Pub Date : 2007-08-22 DOI: 10.1109/ICIG.2007.94
J. Nie, L. Zhang
{"title":"Fast Texture Mapping from a Single Frontal Image","authors":"J. Nie, L. Zhang","doi":"10.1109/ICIG.2007.94","DOIUrl":"https://doi.org/10.1109/ICIG.2007.94","url":null,"abstract":"This paper introduces an improved texture mapping method to meet the future requirement of palm equipment applications. In the case of a lower resource configuration, because there is no requirement of the exact matching between model and texture, the facial texture is extracted from a single frontal face image through a few simple interactions. According to the feature points manual- marked on the texture image, the local texture coordinates can be auto-adjusted alternatively by the algorithm. Experimental results show that the algorithm is rapid, real-time and robust; and that the output model is photo-realistic.","PeriodicalId":367106,"journal":{"name":"Fourth International Conference on Image and Graphics (ICIG 2007)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131198969","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
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