2014 5th European Workshop on Visual Information Processing (EUVIP)最新文献_第4页

Improved side matching for matched-texture coding 改进了匹配纹理编码的侧匹配

2014 5th European Workshop on Visual Information Processing (EUVIP) Pub Date : 2014-12-01 DOI: 10.1109/EUVIP.2014.7018377

Guoxin Jin, T. Pappas, D. Neuhoff

{"title":"Improved side matching for matched-texture coding","authors":"Guoxin Jin, T. Pappas, D. Neuhoff","doi":"10.1109/EUVIP.2014.7018377","DOIUrl":"https://doi.org/10.1109/EUVIP.2014.7018377","url":null,"abstract":"Matched-texture coding (MTC) exploits the redundancy of textured regions in natural images in order to achieve low-encoding-rate structurally lossless compression. A key element of MTC identifying large image blocks that can be replaced with previously encoded blocks that have similar structure. The side matching (SM) approach attempts to do this by matching the upper and left boundary (side) of a target block with the corresponding boundary of the candidate block, and then, among the best side matches, selecting the one that best matches the target block. We explore the effectiveness of, and interplay between, three SM criteria in order to increase the number and quality of matches and to reduce the computational complexity. The criteria are mean-squared-error, log variance ratio, and partial implementations of STSIM-2, a recently proposed structural texture similarity metric. We propose a hierarchical algorithm for side matching, with three layers that utilize the three metrics, that improves performance and reduces the computation complexity. To set thresholds for the first and second layers of the hierarchical algorithm, we rely on Bayesian hypothesis testing. To estimate the necessary local probability densities, we introduce an adaptive estimation technique that depends on the side matching search region. Experimental results demonstrate an improvement of quality for a given encoding rate over previous realizations of MTC.","PeriodicalId":442246,"journal":{"name":"2014 5th European Workshop on Visual Information Processing (EUVIP)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129246001","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

Face recognition with a novel image representation: Local Walsh-Hadamard Transform

2014 5th European Workshop on Visual Information Processing (EUVIP) Pub Date : 2014-12-01 DOI: 10.1109/EUVIP.2014.7018389

Meryem Uzun-Per, M. Gökmen

{"title":"Face recognition with a novel image representation: Local Walsh-Hadamard Transform","authors":"Meryem Uzun-Per, M. Gökmen","doi":"10.1109/EUVIP.2014.7018389","DOIUrl":"https://doi.org/10.1109/EUVIP.2014.7018389","url":null,"abstract":"In this paper, we present a rich image representation which is robust to illumination, facial expression and scale variations. For this aim, firstly, we propose a novel dense local image representation method based on Walsh Hadamard Transform (WHT) called Local WHT (LWHT). LWHT is the application of WHT to each pixel of an image to decompose it into multiple components, called LWHT maps. Secondly, although LWHT maps are real valued images we propose a method to produce complex valued images from LWHT maps by pairing these maps. We utilize these complex valued image components to obtain Phase Magnitude Histograms (PMHs) in feature extraction stage. Experiments on FERET dataset show that LWHT outperforms Local Binary Patterns (LBP) and Local Gabor Binary Patterns. To further improve the recognition performance, we enhanced our basic method by dividing images into subregions and weighting them, applying cascaded LWHT, and reducing dimension of feature vectors by Block-based Whitened Principal Component Analysis (BWPCA). Experimental results show that the proposed algorithm considerably improves the Walsh-based face recognition and generate comparable results for LBP and Gabor based approaches.","PeriodicalId":442246,"journal":{"name":"2014 5th European Workshop on Visual Information Processing (EUVIP)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127891067","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

A new fractional-order variational model for speckled de-noising 一种新的分数阶变分散斑去噪模型

2014 5th European Workshop on Visual Information Processing (EUVIP) Pub Date : 2014-12-01 DOI: 10.1109/EUVIP.2014.7018384

Meriem Hacini, F. Hachouf, K. Djemal

引用次数: 3

Using sparse coding for landmark localization in facial expressions 基于稀疏编码的面部表情标记定位

2014 5th European Workshop on Visual Information Processing (EUVIP) Pub Date : 2014-12-01 DOI: 10.1109/EUVIP.2014.7018369

Vittorio Cuculo, R. Lanzarotti, Giuseppe Boccignone

引用次数: 10

Weber local descriptor from three orthogonal planes based video copy detection 基于三个正交平面的Weber局部描述子的视频拷贝检测

2014 5th European Workshop on Visual Information Processing (EUVIP) Pub Date : 2014-12-01 DOI: 10.1109/EUVIP.2014.7018374

Aissa Boukhari, A. Serir

引用次数: 2

Segmentation-based 3D dynamic mesh compression scheme 基于分段的三维动态网格压缩方案

2014 5th European Workshop on Visual Information Processing (EUVIP) Pub Date : 2014-12-01 DOI: 10.1109/EUVIP.2014.7018386

M. Hachani, A. O. Zaid, W. Puech

引用次数: 1

Multimodal face recognition based on histograms of three local descriptors using score level fusion 基于三局部描述符直方图的多模态人脸识别

2014 5th European Workshop on Visual Information Processing (EUVIP) Pub Date : 2014-12-01 DOI: 10.1109/EUVIP.2014.7018380

A. Chouchane, M. Belahcene, A. Ouamane, S. Bourennane

引用次数: 1

Kinect depth map inpainting using spline approximation 使用样条近似绘制Kinect深度图

2014 5th European Workshop on Visual Information Processing (EUVIP) Pub Date : 2014-12-01 DOI: 10.1109/EUVIP.2014.7018372

Denis Brazey, C. Gout

引用次数: 1

A new pooling strategy for image quality metrics: Five number summary 一种新的图像质量度量池策略:五数摘要

2014 5th European Workshop on Visual Information Processing (EUVIP) Pub Date : 2014-12-01 DOI: 10.1109/EUVIP.2014.7018373

C. Zewdie, Marius Pedersen, Zhaohui Wang

引用次数: 8

3D-aided face recognition from videos 视频中的3d辅助人脸识别

2014 5th European Workshop on Visual Information Processing (EUVIP) Pub Date : 2014-12-01 DOI: 10.1109/EUVIP.2014.7018366

Baptiste Chu, S. Romdhani, Liming Chen

{"title":"3D-aided face recognition from videos","authors":"Baptiste Chu, S. Romdhani, Liming Chen","doi":"10.1109/EUVIP.2014.7018366","DOIUrl":"https://doi.org/10.1109/EUVIP.2014.7018366","url":null,"abstract":"The deployment of cameras for security control allows for video stream to be used as input for face recognition (FR). However, most state of the art FR SDKs are generally specifically tuned for dealing with frontal and neutral face images, whereas expression and pose variations, which typically occur in unconstrained settings, e.g., video images, are still major challenges for reliable FR. In this paper, we aim to endow the state of the art FR SDKs with the capabilities to recognize faces in videos. For this purpose, given a video sequence of a person, an extended 3D Morphable Model (3DMM) is used to generate a novel view of this person where the pose is rectified and the expression neutralized. We present a 3DMM fitting method specifically designed for videos to take into account the temporal properties, making use of multiple frames for fitting. Moreover, some constraints of smoothness are used to get a better estimation of its 3D shape and to separate its expression component from its identity component. Finally, we evaluate the proposed method on the Prison Break TV serial and demonstrate its effectiveness using a standard commercial FR SDK.","PeriodicalId":442246,"journal":{"name":"2014 5th European Workshop on Visual Information Processing (EUVIP)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127137676","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