Real-Time Imaging最新文献

A neighborhood evaluated adaptive vector filter for suppression of impulse noise in color images 一种邻域评估自适应矢量滤波器用于抑制彩色图像中的脉冲噪声

Real-Time Imaging Pub Date : 2005-10-01 DOI: 10.1016/j.rti.2005.07.002

Zhonghua Ma , Dagan Feng , Hong Ren Wu

引用次数: 33

Real-time acquisition of depth and color images using structured light and its application to 3D face recognition 基于结构光的深度和颜色图像实时采集及其在三维人脸识别中的应用

Real-Time Imaging Pub Date : 2005-10-01 DOI: 10.1016/j.rti.2005.06.006

Filareti Tsalakanidou , Frank Forster , Sotiris Malassiotis , Michael G. Strintzis

{"title":"Real-time acquisition of depth and color images using structured light and its application to 3D face recognition","authors":"Filareti Tsalakanidou , Frank Forster , Sotiris Malassiotis , Michael G. Strintzis","doi":"10.1016/j.rti.2005.06.006","DOIUrl":"10.1016/j.rti.2005.06.006","url":null,"abstract":"<div><p>In this paper, a novel real-time 3D and color sensor for the mid-distance range (0.1–3<!--> <span><span>m) based on color-encoded structured light is presented. The sensor is integrated using low-cost of-the-shelf components and allows the combination of 2D and 3D image processing algorithms, since it provides a 2D color image of the scene in addition to the range data. Its design is focused on enabling the system to operate reliably in real-world scenarios, i.e. in uncontrolled environments and with arbitrary scenes. To that end, novel approaches for encoding and recognizing the projected light are used, which make the system practically independent of intrinsic object colors and minimize the influence of the </span>ambient light conditions<span>. The system was designed to assist and complement a face authentication system<span> integrating both 2D and 3D images. Depth information is used for robust face detection, localization and 3D pose estimation. To cope with illumination and pose variations, 3D information is used for the normalization of the input images. The performance and robustness of the proposed system is tested on a face database recorded in conditions similar to those encountered in real-world applications.</span></span></span></p></div>","PeriodicalId":101062,"journal":{"name":"Real-Time Imaging","volume":"11 5","pages":"Pages 358-369"},"PeriodicalIF":0.0,"publicationDate":"2005-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.rti.2005.06.006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79906957","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: 46

DWT-based scene-adaptive color quantization 基于小波变换的场景自适应颜色量化

Real-Time Imaging Pub Date : 2005-10-01 DOI: 10.1016/j.rti.2005.06.003

N. Kim, N. Kehtarnavaz

{"title":"DWT-based scene-adaptive color quantization","authors":"N. Kim, N. Kehtarnavaz","doi":"10.1016/j.rti.2005.06.003","DOIUrl":"10.1016/j.rti.2005.06.003","url":null,"abstract":"<div><p><span><span>Color quantization is the process of reducing the number of colors in an image. That is, color quantization maps a large number of colors into a much smaller number of representative colors while keeping color distortion to an acceptable level. The reduction in the number of colors lowers computational complexity associated with color processing, and achieves higher color </span>image compression<span> for storage and transmission purposes. The existing color quantization methods require that the number of representative or prominent colors be specified by the user. This paper presents a scene-adaptive color quantization method which eases this constraint by determining the number of representative colors automatically. This method utilizes the discrete wavelet transform to achieve a computationally efficient implementation of the multi-scale </span></span>clustering algorithm in a 3D color space. The performance is evaluated in terms of compression ratio or number of representative colors, color distortion, and computational complexity. It is shown that the developed method outperforms the popular color quantization methods in terms of color distortion.</p></div>","PeriodicalId":101062,"journal":{"name":"Real-Time Imaging","volume":"11 5","pages":"Pages 443-453"},"PeriodicalIF":0.0,"publicationDate":"2005-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.rti.2005.06.003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83154790","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: 20

A fast impulsive noise color image filter using fuzzy metrics 基于模糊度量的快速脉冲噪声彩色图像滤波

Real-Time Imaging Pub Date : 2005-10-01 DOI: 10.1016/j.rti.2005.06.007

Samuel Morillas , Valentín Gregori , Guillermo Peris-Fajarnés, Pedro Latorre

引用次数: 141

Real-time lossless compression of mosaic video sequences 马赛克视频序列的实时无损压缩

Real-Time Imaging Pub Date : 2005-10-01 DOI: 10.1016/j.rti.2005.07.001

Lei Zhang , Xiaolin Wu , Paul Bao

引用次数: 15

Modified SPIHT algorithm for wavelet packet image coding 改进的SPIHT小波包图像编码算法

Real-Time Imaging Pub Date : 2005-10-01 DOI: 10.1016/j.rti.2005.06.009

Nikola Sprljan , Sonja Grgic , Mislav Grgic

引用次数: 0

Real-time segmentation of surgical instruments inside the abdominal cavity using a joint hue saturation color feature 利用关节色相饱和度特征对腹腔内手术器械进行实时分割

Real-Time Imaging Pub Date : 2005-10-01 DOI: 10.1016/j.rti.2005.06.008

C. Doignon, P. Graebling, M. de Mathelin

{"title":"Real-time segmentation of surgical instruments inside the abdominal cavity using a joint hue saturation color feature","authors":"C. Doignon, P. Graebling, M. de Mathelin","doi":"10.1016/j.rti.2005.06.008","DOIUrl":"10.1016/j.rti.2005.06.008","url":null,"abstract":"<div><p>In this paper, the real-time segmentation of surgical instruments with color images used in minimally invasive surgery is addressed. This work has been developed in the scope of the robotized laparoscopic surgery, specifically for the detection and tracking of gray regions and accounting for images of metallic instruments inside the abdominal cavity. With this environment, the moving background due to the breathing motion, the non-uniform and time-varying lighting conditions and the presence of specularities are the main difficulties to overcome. Then, to achieve an automatic color segmentation suitable for robot control, we developed a technique based on a discriminant color feature with robustness capabilities with respect to intensity variations and specularities. We also designed an adaptive region growing with automatic region seed detection and a model-based region classification, both dedicated to laparoscopy. The foreseen application is a good training ground to evaluate the proposed technique and the effectiveness of this work has been demonstrated through experimental results with endoscopic image sequences to efficiently locate boundaries of a landmark-free needle-holder at half the video-rate.</p></div>","PeriodicalId":101062,"journal":{"name":"Real-Time Imaging","volume":"11 5","pages":"Pages 429-442"},"PeriodicalIF":0.0,"publicationDate":"2005-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.rti.2005.06.008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77040044","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: 68

Least-squares smoothing of 3D digital curves 三维数字曲线的最小二乘平滑

Real-Time Imaging Pub Date : 2005-10-01 DOI: 10.1016/j.rti.2005.06.002

Ján Glasa

引用次数: 1

A cost-effective encryption scheme for color images 一种具有成本效益的彩色图像加密方案

Real-Time Imaging Pub Date : 2005-10-01 DOI: 10.1016/j.rti.2005.05.002

Rastislav Lukac, Konstantinos N. Plataniotis

引用次数: 31

Multi-dimensional image processing 多维图像处理

Real-Time Imaging Pub Date : 2005-10-01 DOI: 10.1016/j.rti.2005.08.002

Rastislav Lukac , Phillip A. Laplante , Konstantinos N. Plataniotis

引用次数: 4