G. Tognola, M. Parazzini, G. Pedretti, P. Ravazzani, F. Grandori, A. Pesatori, M. Norgia, C. Svelto
{"title":"Novel 3D Reconstruction Method for Mandibular Distraction Planning","authors":"G. Tognola, M. Parazzini, G. Pedretti, P. Ravazzani, F. Grandori, A. Pesatori, M. Norgia, C. Svelto","doi":"10.1109/IST.2006.1650780","DOIUrl":"https://doi.org/10.1109/IST.2006.1650780","url":null,"abstract":"In order to plan mandibular distraction, 3D techniques of volumetric reconstruction and image processing were applied. The 3D model of the mandible was obtained from standard 2D Computed Tomography images using a suitable 2D-to-3D image processing. The end purpose of this study is to provide the surgeon with a 3D model of the patient mandible where it would be possible to find, in the pre-surgical phase, the exact point of implantation with respect to patient's anatomy and to build a customized distractor properly fitting the bone surface of the patient.","PeriodicalId":175808,"journal":{"name":"Proceedings of the 2006 IEEE International Workshop on Imagining Systems and Techniques (IST 2006)","volume":"83 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":"122931149","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":"Programmable Vision Sensors with On-chip Real-time Image Processing","authors":"M. Gottardi, N. Massari, A. Simoni","doi":"10.1109/IST.2006.1650766","DOIUrl":"https://doi.org/10.1109/IST.2006.1650766","url":null,"abstract":"In this contribution, the research activity on CMOS pro- grammable vision sensors, carried out at ITC-irst, is presented, with special attention on pixel-parallel architectures for low-level real- time processing tasks. Different pixel topologies are described for full-kernel spatio-temporal filtering, featuring a good tradeoff be- tween pixel-pitch, fill-factor and power consumption (1-4). Thanks to the switched capacitor pixel implementation, all the vision processing can be accomplished by simply changing the sensor timing diagram, which is the key idea of the presented vision sensors. Moreover, a novel approach for on-the-fly image processing over high dynamic- range images is described, adopting integration time sharing and oversampling techniques, which allow integration time and process- ing time to be overlapped, offering new ways of implementing on-chip real-time image processing.","PeriodicalId":175808,"journal":{"name":"Proceedings of the 2006 IEEE International Workshop on Imagining Systems and Techniques (IST 2006)","volume":"88 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":"132946026","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}
G. Bozza, C. Estatico, A. Massa, M. Pastorino, A. Randazzo
{"title":"An Inexact-Newton Algorithm for Tomographic Microwave Imaging","authors":"G. Bozza, C. Estatico, A. Massa, M. Pastorino, A. Randazzo","doi":"10.1109/IST.2006.1650791","DOIUrl":"https://doi.org/10.1109/IST.2006.1650791","url":null,"abstract":"In this paper an Inexact Newton method is applied to solve the electromagnetic inverse scattering problem. Such algorithm is composed by two nested loops: in the outer one the nonlinear scat- tering equations are linearized and in the inner one the linearized equation is solved by means of a truncated Landweber method. In particular, the tomographic arrangement is considered to reconstruct dielectric targets in noisy environments, by exploiting the regularizing properties of the proposed approach.","PeriodicalId":175808,"journal":{"name":"Proceedings of the 2006 IEEE International Workshop on Imagining Systems and Techniques (IST 2006)","volume":"65 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":"134589975","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":"3-D Underwater Acoustic Imaging by an Efficient Frequency Domain Beamforming","authors":"M. Palmese, G. De Toni, A. Trucco","doi":"10.1109/IST.2006.1650781","DOIUrl":"https://doi.org/10.1109/IST.2006.1650781","url":null,"abstract":"To generate underwater volumetric acoustic images a planar array is the minimal requirement, as a linear aperture does not allow one to discriminate signals coming from a 3-D space. Therefore, the number of signals acquired by the receiving array and then processed by an adequate algorithm is often huge, giving rise to a computational load prohibitive for a real-time image generation. An efficient frequency beamforming implementation based on the use of the Chirp Zeta Transform (CZT) has been proposed in literature in case of linear equally spaced array. The contribution proposed in this paper is aimed at extending such an implementation to a planar array. In particular, as the direction of a beam inside a 3-D space involves the use of two steering angles, the choice of such angles is fundamental to extend the CZT beamforming to a 2-D array: a conventional formalism does not allow one to express the main computation as a discrete convolution, and thus to exploit the advantages of the fast Fourier transform. The conducted analysis, in terms of computational complexity and system performances, compares the developed solution with traditional beamforming algorithms implemented in time domains, showing several advantages of the proposed method.","PeriodicalId":175808,"journal":{"name":"Proceedings of the 2006 IEEE International Workshop on Imagining Systems and Techniques (IST 2006)","volume":"14 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":"134054700","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":"Processing of Interference Fringe Patterns to obtain highly localized Strain","authors":"B. R. Arminger, B. Zagar","doi":"10.1109/IST.2006.1650772","DOIUrl":"https://doi.org/10.1109/IST.2006.1650772","url":null,"abstract":"Mechanical strain and displacement measurements are important in general material testing. Especially non-contacting methods like optical measurement are needed to analyze the behaviour of micro materials since no other standard method is otherwise available. In this paper a measurement method is introduced that fulfills these requirements. The device under test has to be prepared only with two Vickers micro hardness indentations. These two markers are illuminated by a collimated laser beam. The mechanical strain or displacement can be measured by scanning the diffracted light field using two CCD line scan cameras. The measurement system is able to resolve displacement of these indentations in the nm range.","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":"134560358","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":"Exploiting XML Documents to Watermark JPEG Images","authors":"Franco Frattolillo, S. D'Onofrio","doi":"10.1109/IST.2006.1650771","DOIUrl":"https://doi.org/10.1109/IST.2006.1650771","url":null,"abstract":"The rise of the Internet and the advances in multimedia technologies have encouraged users to copy digital contents and ille- gally share them, thus violating the legal rights of content owners. In such a scenario, digital watermarking has become a key technology to support the copyright protection of multimedia digital contents dis- tributed on the Internet. This paper presents a nonblind watermarking procedure for JPEG images based on protected XML documents. The procedure enables the copyright owner to insert a distinct watermark code identifying the buyer into the distributed images. More precisely, the watermark is repeatedly embedded into an image in the DCT do- main at different frequencies and by exploiting both block classifica- tion techniques and perceptual analysis. The watermark is then ex- tracted from an image according to the information contained in a protected XML document associated to the image.","PeriodicalId":175808,"journal":{"name":"Proceedings of the 2006 IEEE International Workshop on Imagining Systems and Techniques (IST 2006)","volume":"198 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":"116150426","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}