2012 IEEE International Conference on Imaging Systems and Techniques Proceedings最新文献_第2页

Machine vision and magnetic imaging NDT for the on-line inspection of stainless steel strips 用于不锈钢带材在线检测的机器视觉和磁成像无损检测

2012 IEEE International Conference on Imaging Systems and Techniques Proceedings Pub Date : 2012-07-16 DOI: 10.1109/IST.2012.6295531

M. Ricci, A. Ficola, M. L. Fravolini, L. Battaglini, V. Brunori, A. Palazzi, M. Pastorelli, P. Burrascano, P. Valigi, L. Appolloni, S. Cervo, C. Rocchi

引用次数: 3

A highly efficient mode decision algorithm and architecture for AVS HD Video Encoder 一种高效的AVS高清视频编码器模式决策算法和体系结构

2012 IEEE International Conference on Imaging Systems and Techniques Proceedings Pub Date : 2012-07-16 DOI: 10.1109/IST.2012.6295561

Shuai Li, Chuang Zhu, Fei Wang, Huizhu Jia, Xiaodong Xie, Wen Gao

{"title":"A highly efficient mode decision algorithm and architecture for AVS HD Video Encoder","authors":"Shuai Li, Chuang Zhu, Fei Wang, Huizhu Jia, Xiaodong Xie, Wen Gao","doi":"10.1109/IST.2012.6295561","DOIUrl":"https://doi.org/10.1109/IST.2012.6295561","url":null,"abstract":"In Advanced Audio Video coding Standard (AVS), the utilization of variable block size ranging from 16×16 to 8×8 in inter frame encoding improves the coding efficiency significantly compared with a fixed MB partition. Rate distortion optimization (RDO) is the best known mode decision method, but the corresponding extremely high computational complexity limits its application. This paper proposes an algorithm based on the visual perception model and Sobel operator edge detection model to quickly select the best inter mode from 16×16, 16×8, 8×16 and 8×8 just by using the original pixels. We further analyze and redesign the MB level pipeline structure, and give the optimized hardware structure of the encoder. We tested different sequences including cif, 720p and 1080p, and the experimental results show that the coding efficiency is comparable with the traditional RDO method. The proposed hardware structure saves fractional motion estimation (FME) by 60% in areas and reduces the processing time by 200 cycles. Our proposed mode decision architecture can support the real time processing of 1080P@30fps.","PeriodicalId":213330,"journal":{"name":"2012 IEEE International Conference on Imaging Systems and Techniques Proceedings","volume":"242 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124333661","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

Accurate optical design of an acousto-optic tunable filter imaging spectrometer 声光可调滤光成像光谱仪的精确光学设计

2012 IEEE International Conference on Imaging Systems and Techniques Proceedings Pub Date : 2012-07-16 DOI: 10.1109/IST.2012.6295512

Pengwei Zhou, Huijie Zhao, Ying Zhang, Chongchong Li

引用次数: 5

Homography-based orientation estimation for capsule endoscope tracking 基于同形图的胶囊内窥镜跟踪方向估计

2012 IEEE International Conference on Imaging Systems and Techniques Proceedings Pub Date : 2012-07-16 DOI: 10.1109/IST.2012.6295583

E. Spyrou, D. Iakovidis

引用次数: 19

Capacitively coupled electrical resistance tomography system based on quartz crystal series resonance 基于石英晶体串联共振电容耦合电阻层析成像系统

2012 IEEE International Conference on Imaging Systems and Techniques Proceedings Pub Date : 2012-07-16 DOI: 10.1109/IST.2012.6295539

Baoliang Wang, Sanfu Fu, H. Ji, Zhiyao Huang, Haiqing Li

引用次数: 0

A dual modality tomography system for particle concentration and charge distribution measurement in dense-phase pneumatic conveyor of pulverized coal 用于煤粉密相气力输送中颗粒浓度和电荷分布测量的双模态层析成像系统

2012 IEEE International Conference on Imaging Systems and Techniques Proceedings Pub Date : 2012-07-16 DOI: 10.1109/IST.2012.6295507

Jian Li, Heming Gao, Chuanlong Xu, Shimin Wang

引用次数: 3

Motion error analysis of 3D coordinates of airborne LIDAR under typical terrains 典型地形下机载激光雷达三维坐标运动误差分析

2012 IEEE International Conference on Imaging Systems and Techniques Proceedings Pub Date : 2012-07-16 DOI: 10.1109/IST.2012.6295553

T. Peng, Tian Lan, Guoqiang Ni

{"title":"Motion error analysis of 3D coordinates of airborne LIDAR under typical terrains","authors":"T. Peng, Tian Lan, Guoqiang Ni","doi":"10.1109/IST.2012.6295553","DOIUrl":"https://doi.org/10.1109/IST.2012.6295553","url":null,"abstract":"With the expansion of airborne LIDAR application, the requirements of accuracy and reliability for airborne LIDAR are increasing. Therefore it is necessary to analyze the motion errors of airborne LIDAR data in order to correct errors and improve accuracy. In this paper, in connection with five kinds of typical terrains, a method for the analysis of dynamic 3D coordinate errors is proposed and models for motion errors of 3D coordinates under typical terrains are established. By choosing the flight altitude, point cloud spacing, instantaneous scanning angle, and other variables, the static and dynamic simulations are conducted. Then the corresponding simulation results are analyzed comparatively. It is shown that 3D coordinate errors are the smallest under flat terrain. On the other hand, under non-flat terrain, the greater the slop angle, the greater the 3D coordinate errors are. The error along flight direction is greater than that along the other two directions. In addition, dynamic 3D coordinate errors are much greater than static 3D coordinate errors. For example, static elevation error is about 0.16m, while dynamic elevation error is 1.02m. In conclusion, it is favorable to select the appropriate flight altitude, point cloud spacing and instantaneous scanning angle as to improve the measurement accuracy.","PeriodicalId":213330,"journal":{"name":"2012 IEEE International Conference on Imaging Systems and Techniques Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129054611","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

Studying atmospheric turbulence effects on aircraft motion for airborne SAR motion compensation requirements 研究大气湍流对飞机运动的影响，满足机载SAR运动补偿要求

2012 IEEE International Conference on Imaging Systems and Techniques Proceedings Pub Date : 2012-07-16 DOI: 10.1109/IST.2012.6295519

Hao Guo, Yang Li, Q. Qu, Peiqing Liu

{"title":"Studying atmospheric turbulence effects on aircraft motion for airborne SAR motion compensation requirements","authors":"Hao Guo, Yang Li, Q. Qu, Peiqing Liu","doi":"10.1109/IST.2012.6295519","DOIUrl":"https://doi.org/10.1109/IST.2012.6295519","url":null,"abstract":"It is necessary to study the influence of atmospheric disturbance on aircraft motion for the motion compensation sensitivity requirements of airborne SAR. Most motion compensation study for airborne SAR is focusing on the effects of assuming motion errors on SAR images from the early years of airborne SAR development. In this paper, based on power spectra density (PSD) method, the spectra of aircraft motion that containing all the response motion information due to atmospheric disturbance can be calculated from the given spectra of the atmospheric turbulence and the transfer function between aircraft motion and atmospheric turbulence. As an example, one common atmospheric turbulence model is applied to get the lateral/longitudinal uncontrolled and controlled aircraft motion. At low frequency domain, our results show that the controlled aircraft motion is suppressed in comparison with the uncontrolled aircraft motion as wished; whereas, at high frequency domain, there is no difference between the spectra of controlled and uncontrolled aircraft motion, i.e., each has a scaling behavior with a scaling exponent corresponding exactly to the atmospheric turbulence model. Based on these aircraft motion analysis, an acceptable residual motion error is predicted from the motion compensation requirements, which suggests that motion compensation for airborne SAR is unavoidable and should pay more attention on the medium frequency range.","PeriodicalId":213330,"journal":{"name":"2012 IEEE International Conference on Imaging Systems and Techniques Proceedings","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130836877","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

Tracking a phantom's lung tumour target using optical flow algorithm and electronic portal imaging devices 利用光流算法和电子门静脉成像设备跟踪一个幻影的肺肿瘤目标

2012 IEEE International Conference on Imaging Systems and Techniques Proceedings Pub Date : 2012-07-16 DOI: 10.1109/IST.2012.6295540

P. Teo, R. Crow, S. Van Nest, S. Pistorius

{"title":"Tracking a phantom's lung tumour target using optical flow algorithm and electronic portal imaging devices","authors":"P. Teo, R. Crow, S. Van Nest, S. Pistorius","doi":"10.1109/IST.2012.6295540","DOIUrl":"https://doi.org/10.1109/IST.2012.6295540","url":null,"abstract":"This paper investigates the feasibility and accuracy of tracking the motion of a lung tumour in a breathing phantom using a computer vision algorithm and electronic portal images. A multi-resolution optical flow algorithm that incorporates weighting based on the differences between frames is used to obtain a set of vectors corresponding to the motion between two frames. A global value representing the average motion is obtained by computing the average weighted mean from the set of vectors. The tracking accuracy of the optical flow algorithm is compared to potentiometer measurements. A self-resetting technique has been used to offset the drift observed in the cumulative position of the target. For a 12 breaths/min motion, a maximum average inter-frame velocity error of (1.06 ± 0.61) mm/s is obtained. A correlation coefficient of 0.97 bounded by a 95% prediction interval of (0.96, 0.98) is established between the optical flow and potentiometer results. Maximum absolute average positional error of 0.42 ± 0.21 mm is achieved. This approach offers the potential of real-time tumour motion tracking.","PeriodicalId":213330,"journal":{"name":"2012 IEEE International Conference on Imaging Systems and Techniques Proceedings","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127847268","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

Autonomous robotic ground penetrating radar surveys of ice sheets; Using machine learning to identify hidden crevasses 自主机器人探地雷达冰盖调查;使用机器学习来识别隐藏的裂缝

2012 IEEE International Conference on Imaging Systems and Techniques Proceedings Pub Date : 2012-07-16 DOI: 10.1109/IST.2012.6295593

R. M. Williams, L. E. Ray, J. Lever

{"title":"Autonomous robotic ground penetrating radar surveys of ice sheets; Using machine learning to identify hidden crevasses","authors":"R. M. Williams, L. E. Ray, J. Lever","doi":"10.1109/IST.2012.6295593","DOIUrl":"https://doi.org/10.1109/IST.2012.6295593","url":null,"abstract":"This paper presents methods to continue development of a completely autonomous robotic system employing ground penetrating radar imaging of the glacier sub-surface. We use well established machine learning algorithms and appropriate un-biased processing, particularly those which are also suitable for real-time image analysis and detection. We tested and evaluated three processing schemes in conjunction with a Support Vector Machine (SVM) trained on 15 examples of Antarctic GPR imagery, collected by our robot and a Pisten Bully tractor in 2010 in the shear zone near McMurdo Station. Using a modified cross validation technique, we correctly classified all examples with a radial basis kernel SVM trained and evaluated on down-sampled and texture-mapped GPR images of crevasses, compared to 60% classification rate using raw data. We also test the most successful processing scheme on a larger dataset, comprised of 94 GPR images of crevasse crossings recorded in the same deployment. Our experiments demonstrate the promise and reliability of real-time object detection and classification with robotic GPR imaging surveys.","PeriodicalId":213330,"journal":{"name":"2012 IEEE International Conference on Imaging Systems and Techniques Proceedings","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129287124","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: 12