Proceedings of the 2006 IEEE International Workshop on Imagining Systems and Techniques (IST 2006)最新文献

{"title":"Unsupervised Change Detection in Multispectral Images based on Independent Component Analysis","authors":"M. Ceccarelli, A. Petrosino","doi":"10.1109/IST.2006.1650775","DOIUrl":"https://doi.org/10.1109/IST.2006.1650775","url":null,"abstract":"Detecting regions of change in multiple images of the same scene taken at different times is of widespread interest due to a large number of applications in diverse disciplines, including remote sens- ing, surveillance, medical diagnosis and treatment, civil infrastruc- ture, and underwater sensing. The paper proposes a data dependent change detection approach based on textural features extracted by the Independent Component Analysis (ICA) model. The properties of ICA allow to create energy features for computing multispectral and multitemporal difference im- ages to be classified. Our experiments on remote sensing images show that the proposed method can efficiently and effectively clas- sify temporal discontinuities corresponding to changed areas over the observed scenes.","PeriodicalId":175808,"journal":{"name":"Proceedings of the 2006 IEEE International Workshop on Imagining Systems and Techniques (IST 2006)","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132452872","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}

{"title":"Synthesis of Metamaterial Coatings for Cylindrical Structures by an Ant-Colony Optimization Algorithm","authors":"G. Bozza, M. Pastorino, M. Raffetto, A. Randazzo","doi":"10.1109/IST.2006.1650792","DOIUrl":"https://doi.org/10.1109/IST.2006.1650792","url":null,"abstract":"In this work the synthesis of metamaterial coatings is considered. The problem is stated for cylindrical structures with a conducting core. The problem is faced by means of an Ant Colony Optimization (ACO) algorithm which has been proven to be a promising tool to solve global optimization problems. Finally, preliminary results are provided to assess the proposed approach.","PeriodicalId":175808,"journal":{"name":"Proceedings of the 2006 IEEE International Workshop on Imagining Systems and Techniques (IST 2006)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131942756","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}

{"title":"Neural Network Mapping and Clustering of Elastic Behavior from Tactile and Range Imaging for Virtualized Reality Applications","authors":"A. Crétu, E. Petriu, P. Payeur","doi":"10.1109/IST.2006.1650768","DOIUrl":"https://doi.org/10.1109/IST.2006.1650768","url":null,"abstract":"To fully reach its potential, virtualized reality needs to go beyond the modeling of rigid bodies and introduce accurate representations of deformable objects. This paper explores neural networks and vision-based and tactile measurement strategies to investigate the intricate processes of acquisition and mapping of properties characterizing deformable objects. An original com- posite neural network framework is applied to guide the tactile probing by clustering measurements representing uniform elastic- ity regions and, therefore, direct sensors toward areas of elasticity transitions where higher sampling density is required. The net- work characterizes the relationship between surface deformation and forces that are exemplified in nonrigid bodies. Beyond serving as a planner for the acquisition of measurements, the proposed composite neural architecture allows the encoding of the complex force/deformation relationship without the need for sophisticated mathematical modeling tools. Experimental results prove the va- lidity and the feasibility of the proposed approach.","PeriodicalId":175808,"journal":{"name":"Proceedings of the 2006 IEEE International Workshop on Imagining Systems and Techniques (IST 2006)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131293029","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}

{"title":"Optimization of 2D to-3D Reconstruction Technique for Maxillo-Facial Surgery Applications","authors":"G. Tognola, M. Parazzini, G. Pedretti, P. Ravazzani, F. Grandori, A. Pesatori, M. Norgia, C. Svelto","doi":"10.1109/IST.2006.1650800","DOIUrl":"https://doi.org/10.1109/IST.2006.1650800","url":null,"abstract":"Facial nerve and mandibula 3D image reconstruction was performed in order to help a better planning of maxillo-facial operations. The 3D model of mandibula was obtained from image segmentation of computed tomography scans elaborated with an optimized gradient vector flow snake method. The gradient vector flow snake method parameters were optimized in order to achieve more accurate contours segmentation of nerve mandibular scans.","PeriodicalId":175808,"journal":{"name":"Proceedings of the 2006 IEEE International Workshop on Imagining Systems and Techniques (IST 2006)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126921220","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}

{"title":"Enhanced Robotic Rover Imaging Sensors for Space Exploration","authors":"G. Giakos, L. Fraiwan, S. Sumrain, S. Sukumar, P. Bathini, D. Wagenar, S. Paturi, V. Adya, M. Reddy, K. Ambadipudi, K. Valluru, D. Sheffer","doi":"10.1109/IST.2006.1650765","DOIUrl":"https://doi.org/10.1109/IST.2006.1650765","url":null,"abstract":"The novelty of this study consists on the design and exploration of the performance of an efficient active sensoroptical polarimetric system aimed to perform real-time detection and 1-d imaging of surface defects. The design of such imaging sensor system would be, among other factors, of paramount significance for remote robotic rover inspections, and repairs of spacecraft structures including thermal protection systems for surface damage. Experimental results indicate an enhancement of the backscattered imaging signal parameters.","PeriodicalId":175808,"journal":{"name":"Proceedings of the 2006 IEEE International Workshop on Imagining Systems and Techniques (IST 2006)","volume":"127 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114471097","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}

{"title":"Diode Laser Stroboscopy in High Speed Imaging","authors":"P. Immonen, A. Makynen","doi":"10.1109/IST.2006.1650801","DOIUrl":"https://doi.org/10.1109/IST.2006.1650801","url":null,"abstract":"– In this work diode laser stroboscopy has been experimented in four different imaging applications. Each case includes small high speed particles sizes and velocities varying from 10µm to 1mm and 50 to 200m/s, respectively. The measurement equipment consists of a powerful diode laser light source and a high-sensitivity 12-bit digital camera. The results show that diode laser stroboscopy provides powerful means to visualize and measure high speed phenomena.","PeriodicalId":175808,"journal":{"name":"Proceedings of the 2006 IEEE International Workshop on Imagining Systems and Techniques (IST 2006)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121903661","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}

{"title":"GPR Data Processing Using the Component-Separation Methods PCA and ICA","authors":"F. Abujarad, A. Omar","doi":"10.1109/IST.2006.1650776","DOIUrl":"https://doi.org/10.1109/IST.2006.1650776","url":null,"abstract":"This paper illustrates clutter reduction in stepped- frequency ground penetrating radar (SFGPR) data for anti- personal landmines detection. For the purpose of clutter reduc- tion, two subspace projection techniques have been studied and applied to experimental data, namely the principle component analysis (PCA) and the independent component analysis (ICA). Their output SNR have also been compared. These two algorithms have been applied and compared for experimental data set with non-metallic AP landmines. The experimental data were collected by using an SFGPR operating on the frequency range from 1 GHz to 20 GHz.","PeriodicalId":175808,"journal":{"name":"Proceedings of the 2006 IEEE International Workshop on Imagining Systems and Techniques (IST 2006)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123474366","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}

{"title":"Automated Assessment of Aortic Regurgitation using 2D Doppler Echocardiogram","authors":"N. Kiruthika, B. Prabhakar, M. Reddy","doi":"10.1109/IST.2006.1650783","DOIUrl":"https://doi.org/10.1109/IST.2006.1650783","url":null,"abstract":"Based on 2D Doppler echocardiography a non-invasive automated method for assessing the severity of Aortic Regurgitation (AR) is explained in this paper. Using GE ultrasound machine equipped with 1.7MHz to 15MHz phased array transducers. Continuous Wave (CW) color Doppler echocardiographic images of aortic valve were obtained from Frontier Life Line Hospital, Chennai, India. Doppler index is extracted by applying image processing techniques. Proposed algorithm automatically detects Peak velocity envelope of the spectral Doppler ultrasound tracings for calculating Pressure Half Time (PHT) available in a single screen frame. Measurements extracted automatically from the maximal velocity envelope are compared with measurements obtained manually where PHT for severity assessment of AR show strong positive correlation (r=0.950313). Present work provides a novel automated tool for extraction of clinical parameters from 2D Doppler images and assesses the severity of AR thus overcoming the short comings of the manual technique.","PeriodicalId":175808,"journal":{"name":"Proceedings of the 2006 IEEE International Workshop on Imagining Systems and Techniques (IST 2006)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122550468","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}

{"title":"Length Measurement of a Rough Surface by Correlating Consecutive Range Images","authors":"J. Junttila, A. Makynen","doi":"10.1109/IST.2006.1650782","DOIUrl":"https://doi.org/10.1109/IST.2006.1650782","url":null,"abstract":"Correlation techniques are widely used for motion and velocity measurement. In this work correlation of one dimensional range images are used to estimate target motion. A length measurement, which is based on the shift estimation of the consecutive overlapping profiles, is studied. Profiles are supposed to be calibrated one dimensional range images and measured from a moving rough surface in the direction of the surface movement.","PeriodicalId":175808,"journal":{"name":"Proceedings of the 2006 IEEE International Workshop on Imagining Systems and Techniques (IST 2006)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122408107","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}

{"title":"On the Interpolation of Echographic Images Exploiting Band-Pass Signals","authors":"S. Curletto, A. Trucco","doi":"10.1109/IST.2006.1650778","DOIUrl":"https://doi.org/10.1109/IST.2006.1650778","url":null,"abstract":"This paper deals with the study of an innovative interpolation technique aimed at the generation of echographic images of a synthetic scene previously insonified. The traditional echographic equipments perform the interpolation process working on the data obtained after the envelope extraction (low- pass data). The proposed method carries out the interpolation process using the band-pass data before the envelope extraction, performing, in this way, a complex values interpolation. I. INTRODUCTION This work refers to the ultrasound imaging. Among all of the possible applications, here we consider the one referring to the generation of medical echographic images. The purposes of this work is the development of new band-pass interpolation techniques aimed to the composition of the echographic images, comparing the results with those obtained adopting the low-pass interpolation methods nowadays in use. The traditional echographic equipments perform the interpolation process on the image pixels, working, in this way, on the gray levels obtained extracting the envelope of the demodulated echoes received by the array and processed by the beamforming algorithm. The linear interpolation function is commonly adopted because it is less burdensome in terms of computational load and provides better results when the spatial sampling theorem is respected. Otherwise, the designed method interpolates directly the band-pass signals obtained by the beamforming process. It is useful to interpolate before the envelope extraction process, since this process causes loss of phase information, which is important to obtain a better image, especially in condition of strong undersampling. In particular, in this paper, we try to demonstrate that the interpolation process applied to the band-pass signals instead of the low-pass signals (after envelope extraction) allows to obtain better results in terms of reconstructed images quality also, as mentioned above, when the spatial sampling theorem is not respected. This characteristic makes it possible to acquire the echo signals in undersampling condition, and thus, reconstructing a fully spatial sampled image using the addressed interpolation method. Some tests regarding the adoption of interpolation functions more complex than the linear one have been carried out on both band-pass and low-pass signals. Even though the implementation of these functions produces an unavoidable computational load growth, the quality of the obtained images is better than those interpolated with traditionally linear functions. In particular, our attention has been","PeriodicalId":175808,"journal":{"name":"Proceedings of the 2006 IEEE International Workshop on Imagining Systems and Techniques (IST 2006)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124234302","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}