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Edge-based Adaptive Directional Intra Prediction 基于边缘的自适应方向内预测
28th Picture Coding Symposium Pub Date : 2010-12-01 DOI: 10.1109/PCS.2010.5702510
Feng Zou, O. Au, Jingjing Dai, Chao Pang, Wen Yang, Xing Wen, Yu Liu
{"title":"Edge-based Adaptive Directional Intra Prediction","authors":"Feng Zou, O. Au, Jingjing Dai, Chao Pang, Wen Yang, Xing Wen, Yu Liu","doi":"10.1109/PCS.2010.5702510","DOIUrl":"https://doi.org/10.1109/PCS.2010.5702510","url":null,"abstract":"H.264/AVC employs intra prediction to reduce spatial redundancy between neighboring blocks. Different directional prediction modes are used to cater diversified video content. Although it achieves quite high coding efficiency, it is desirable to analyze its drawbacks in the existing video coding standard, since it allows us to design better ones. Basically, even after intra prediction, the residue still contains a lot of edge or texture information. Unfortunately, these high frequency components consume a large quantity of bits and the distortion is usually quite high. Based on this drawback, an Edge-based Adaptive Directional Intra Prediction is proposed (EADIP) to reduce the residue energy especially for the edge region. In particular, we establish an edge model in EADIP, which is quite flexible for natural images. Within the model, the edge splits the macroblock into two regions, each being predicted separately. In implementation, we consider the current trend of mode selection and complexity issues. A mode extension is made on INTRA 16×16 in H.264/AVC. Experimental results show that the proposed algorithm outperforms H.264/AVC. And the proposed mode is more likely to be chosen in low bitrate situations.","PeriodicalId":255142,"journal":{"name":"28th Picture Coding Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129367840","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
Improved watermark sharing scheme using minimum error selection and shuffling 采用最小错误选择和变换的改进水印共享方案
28th Picture Coding Symposium Pub Date : 2010-12-01 DOI: 10.1109/PCS.2010.5702482
Aroba Khan, Yohei Yokoyama, Kiyoshi Tanaka
{"title":"Improved watermark sharing scheme using minimum error selection and shuffling","authors":"Aroba Khan, Yohei Yokoyama, Kiyoshi Tanaka","doi":"10.1109/PCS.2010.5702482","DOIUrl":"https://doi.org/10.1109/PCS.2010.5702482","url":null,"abstract":"In this work, we focus on a watermark sharing scheme using error diffusion called DHCED, and try to overcome some drawbacks of this method. The proposed method simultaneously generates carrier halftone images that share the watermark information by selecting the minimum error caused in the noise function for watermark embedding. Also, the proposed method shuffles watermark image before embedding not only to increase the secracy of the embedded watermark information but also improve the watermark detection ratio as well as the watermark appearance in the detection process. We verify the superiority of the proposed method through computer simulation using some benchmark images.","PeriodicalId":255142,"journal":{"name":"28th Picture Coding Symposium","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126970926","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
Compression of pre-computed per-pixel texture features using MDS 使用MDS压缩预先计算的每像素纹理特征
28th Picture Coding Symposium Pub Date : 2010-12-01 DOI: 10.1109/PCS.2010.5702517
Wai-Man Pang, H. Wong
{"title":"Compression of pre-computed per-pixel texture features using MDS","authors":"Wai-Man Pang, H. Wong","doi":"10.1109/PCS.2010.5702517","DOIUrl":"https://doi.org/10.1109/PCS.2010.5702517","url":null,"abstract":"There are many successful experiences employing texture analysis to improve the accuracy and robustness of image segmentation. Usually, per-pixel based texture analysis is required, which involves intensive computation especially for large images. Precomputation and storing of the texture features involves large file space which is not cost effective. To adopt to these novel needs, we propose the use of multidimensional scaling (MDS) technique to reduce the size of per-pixel texture features of an image while preserving the textural discrminiability for segmentation. Per-pixel texture features will create very large dissimilarity matrix, making the solving of MDS intractable. A sampling-based MDS is therefore introduced to tackle the problem with a divide-and-conquer approach. A compression ratio of 1:24 can be achieved with an average error rate lower than 7%. Preliminary experiments on segmentation using the compressed data show satisfactory results as good as using the uncompressed features. We foresee that such a method will allow texture features to be stored and transferred more efficiently on low processing power devices or embedded systems like mobile phones.","PeriodicalId":255142,"journal":{"name":"28th Picture Coding Symposium","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122619280","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
Enhanced region-based adaptive interpolation filter 增强的基于区域的自适应插值滤波器
28th Picture Coding Symposium Pub Date : 2010-12-01 DOI: 10.1109/PCS.2010.5702554
Shohei Matsuo, Y. Bandoh, Seishi Takamura, H. Jozawa
{"title":"Enhanced region-based adaptive interpolation filter","authors":"Shohei Matsuo, Y. Bandoh, Seishi Takamura, H. Jozawa","doi":"10.1109/PCS.2010.5702554","DOIUrl":"https://doi.org/10.1109/PCS.2010.5702554","url":null,"abstract":"Motion compensation with quarter-pel accuracy was added to H.264/AVC to improve the coding efficiency of images exhibiting fractional-pel movement. To enlarge the reference pictures, a fixed 6-tap filter is used. However, the values of the filter coefficients are constant regardless of the characteristic of the input video. An improved interpolation filter, called the Adaptive Interpolation Filter (AIF), that optimizes the filter coefficients on a frame-by-frame basis was proposed to solve the problem. However, when the image is divided into multiple regions, each of which has different characteristics, the coding efficiency could be futher improved by performing optimization on a region-by-region basis. Therefore, we propose a Region-Based AIF (RBAIF) that takes account of image locality. Simulations show that RBAIF offers about 0.43 point higher coding gain than the conventional AIF.","PeriodicalId":255142,"journal":{"name":"28th Picture Coding Symposium","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132610476","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
Image coding approach based on image decomposition 基于图像分解的图像编码方法
28th Picture Coding Symposium Pub Date : 2010-12-01 DOI: 10.1109/PCS.2010.5702556
Yunhui Shi, Yanli Hou, Baocai Yin, Wenpeng Ding
{"title":"Image coding approach based on image decomposition","authors":"Yunhui Shi, Yanli Hou, Baocai Yin, Wenpeng Ding","doi":"10.1109/PCS.2010.5702556","DOIUrl":"https://doi.org/10.1109/PCS.2010.5702556","url":null,"abstract":"Textures in many images or video scenes are difficult to code because of the large amount of visible detail. This paper proposes an image coding approach to solve this problem, in which we incorporate image decomposition and texture synthesis technology into the image coding framework. The key idea of our approach is to first decompose the original image into cartoon component u and texture component v with different basic characteristics, and then to synthesize the selected texture regions in texture component v. The cartoon component u and the non-synthetic regions in texture component v are compressed by JPEG. Experimental results show bit-rate savings of over 30% compared with JPEG at similar visual quality levels.","PeriodicalId":255142,"journal":{"name":"28th Picture Coding Symposium","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116986611","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
Distance and relative speed estimation of binocular camera images based on defocus and disparity information 基于离焦和视差信息的双目相机图像距离和相对速度估计
28th Picture Coding Symposium Pub Date : 2010-12-01 DOI: 10.1109/PCS.2010.5702486
Mitsuyasu Ito, Yoshiaki Takada, T. Hamamoto
{"title":"Distance and relative speed estimation of binocular camera images based on defocus and disparity information","authors":"Mitsuyasu Ito, Yoshiaki Takada, T. Hamamoto","doi":"10.1109/PCS.2010.5702486","DOIUrl":"https://doi.org/10.1109/PCS.2010.5702486","url":null,"abstract":"In this paper, we discuss a method of distance and relative speed estimation for ITS by using a certain amount of focus blur. In this method, we use different focus positions of two cameras for obtaining the amount of focus blur. Next, we propose the method of distance estimation by the amount of focus blur and disparity information. According to the result of simulation, the distance and relative speed were estimated reasonably. In addition, we compose a prototype system for the real-time estimation of distance and relative speed. The system consisted of CMOS sensors designed for this processing, an FPGA, a PC, and other devices. As a result of the implementation of processing, our system was properly validated.","PeriodicalId":255142,"journal":{"name":"28th Picture Coding Symposium","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117003358","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
VQ based data hiding method for still images by tree-structured links 基于VQ的树状链接静态图像数据隐藏方法
28th Picture Coding Symposium Pub Date : 2010-12-01 DOI: 10.1109/PCS.2010.5702489
Hisashi Igarashi, Yuichi Tanaka, Madoka Hasegawa, Shigeo Kato
{"title":"VQ based data hiding method for still images by tree-structured links","authors":"Hisashi Igarashi, Yuichi Tanaka, Madoka Hasegawa, Shigeo Kato","doi":"10.1109/PCS.2010.5702489","DOIUrl":"https://doi.org/10.1109/PCS.2010.5702489","url":null,"abstract":"In this paper, we propose a data embedding method into still images based on Vector Quantization (VQ). In recent years, several VQ-based data embedding methods have been proposed. For examle, ‘Mean Gray-Level Embedding method (MGLE)’ are ‘Pair wise Nearest-Neighbor Embedding method (PNNE)’ are simple, but not sufficiently effective. Meanwhile, an efficient adaptive data hiding method called ‘Adaptive Clustering Embedding method (ACE)’ was proposed, but is somewhat complicated because the VQ indices have to be adaptively clustered in the embedding process. In our proposed method, output vectors are considered as nodes, and nodes are linked as a tree structure and information is embedded by using some of linked vectors. The simulation results show that our proposed method indicates higher SNR than the conventional methods under the same amounts of embedded data.","PeriodicalId":255142,"journal":{"name":"28th Picture Coding Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132388960","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
Direction-adaptive hierarchical decomposition for image coding 方向自适应分层分解图像编码
28th Picture Coding Symposium Pub Date : 2010-12-01 DOI: 10.1109/PCS.2010.5702566
Tomokazu Murakami, Keita Takahashi, T. Naemura
{"title":"Direction-adaptive hierarchical decomposition for image coding","authors":"Tomokazu Murakami, Keita Takahashi, T. Naemura","doi":"10.1109/PCS.2010.5702566","DOIUrl":"https://doi.org/10.1109/PCS.2010.5702566","url":null,"abstract":"A new model of decomposing an image hierarchically into direction-adaptive subbands using pixel-wise direction estimation is presented. For each decomposing operation, an input image is divided into two parts: a base image subsampled from the input image and subband components. The subband components consist of residuals of estimating the pixels skipped through the subsampling, which ensures the invertibility of the decomposition. The estimation is performed in a direction-adaptive way, whose optimal direction is determined by a L1 norm criterion for each pixel, aiming to achieve good energy compaction that is suitable for image coding. Furthermore, since the L1 norms are obtained from the base image alone, we do not need to retain the directional information explicitly, which is another advantage of our model. Experimental results show that the proposed model can achieve lower entropy than conventional Haar or D5/3 discrete wavelet transform in case of lossless coding.","PeriodicalId":255142,"journal":{"name":"28th Picture Coding Symposium","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132509721","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
Image quality assessment based on local orientation distributions 基于局部方向分布的图像质量评价
28th Picture Coding Symposium Pub Date : 2010-12-01 DOI: 10.1109/PCS.2010.5702485
Yue Wang, Tingting Jiang, Siwei Ma, Wen Gao
{"title":"Image quality assessment based on local orientation distributions","authors":"Yue Wang, Tingting Jiang, Siwei Ma, Wen Gao","doi":"10.1109/PCS.2010.5702485","DOIUrl":"https://doi.org/10.1109/PCS.2010.5702485","url":null,"abstract":"Image quality assessment (IQA) is very important for many image and video processing applications, e.g. compression, archiving, restoration and enhancement. An ideal image quality metric should achieve consistency between image distortion prediction and psychological perception of human visual system (HVS). Inspired by that HVS is quite sensitive to image local orientation features, in this paper, we propose a new structural information based image quality metric, which evaluates image distortion by computing the distance of Histograms of Oriented Gradients (HOG) descriptors. Experimental results on LIVE database show that the proposed IQA metric is competitive with state-of-the-art IQA metrics, while keeping relatively low computing complexity.","PeriodicalId":255142,"journal":{"name":"28th Picture Coding Symposium","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114067853","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
Subjective assessment of frame loss concealment methods in 3D video 三维视频中帧丢失隐藏方法的主观评价
28th Picture Coding Symposium Pub Date : 2010-12-01 DOI: 10.1109/PCS.2010.5702455
J. Carreira, Luís Pinto, Nuno M. M. Rodrigues, S. Faria, P. Assunção
{"title":"Subjective assessment of frame loss concealment methods in 3D video","authors":"J. Carreira, Luís Pinto, Nuno M. M. Rodrigues, S. Faria, P. Assunção","doi":"10.1109/PCS.2010.5702455","DOIUrl":"https://doi.org/10.1109/PCS.2010.5702455","url":null,"abstract":"This paper investigates the subjective impact resulting from different concealment methods for coping with lost frames in 3D video communication systems. It is assumed that a high priority channel is assigned to the main view and only the auxiliary view is subject to either transmission errors or packet loss, leading to missing frames at the decoder output. Three methods are used for frame concealment under different loss ratios. The results show that depth is well perceived by users and the subjective impact of frame loss not only depends on the concealment method but also exhibits high correlation with the disparity of the original sequence. It is also shown that under heavy loss conditions it is better to switch from 3D to 2D rather than presenting concealed 3D video to users.","PeriodicalId":255142,"journal":{"name":"28th Picture Coding Symposium","volume":"272 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115905596","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
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