简介:Videoobjectextractionisakeytechnologyincontent-basedvideocoding.AnovelvideoobjectextractingalgorithmbytwoDimensional(2-D)mesh-basedmotionanalysisisproposedinthispaper.Firstly,a2-Dmeshfittingtheoriginalframeimageisobtainedviafeaturedetectionalgorithm.Then,higherorderstatisticsmotionanalysisisappliedonthe2-Dmeshrepresentationtogetaninitialmotiondetectionmask.Afterpost-processing,thefinalsegmentingmaskisquicklyobtained.Andhencethevideoobjectiseffectivelyextracted.Experimentalresultsshowthattheproposedalgorithmcombinesthemeritsofmesh-basedsegmentingalgorithmsandpixel-basedsegmentingalgorithms,andherebyachievessatisfactorysubjectiveandobjectiveperformancewhiledramaticallyincreasingthesegmentingspeed.
简介:A3D扩充了现实航行系统使用实体镜的图象为teleoperated机器人系统被开发。在模仿的模型和实际机器人的录像图象之间的精确匹配能被认识到,它帮助操作员正确地并且可靠地完成遥控任务。系统介绍不同地图翻译转变方法为实体镜的显示器拿视差图象,提供操作符immersive3D经验。同时,动态立体声录像的一个快、精确的登记方法被建议,并且一个虚拟机器人的有效集成和真实立体声景色能被完成。系统的操作错误在不到2.2公里和平均错误被维持的初步的实验表演是0.8547,在x的0.9093和0.6972公里,y,z方向分别地。大量实验象按按钮那样,等等拉抽屉也被进行评估系统的表演。结构的深度信息能是的可行性研究表演很快并且在遥远的环境认出了地点。图象覆盖系统的扩充现实能增加操作精确性并且由于看的直觉的3D减少过程时间。
简介:TheproblemsofcharacteristicpolynomialassignmentinFomasini-Marchesini(F-M)modelⅡof2-Dsystemsareinvestigated.Thecorrespondingclosed-loopsystemsdescribedbyF-MmodelIIareobtainedviathestatefeedback.Usingthealgebraicgeometrymethod,thecharacteristicpolynomialassignmentinthedosed-loopsystemsisdiscussed.Intermsofthetheoryofalgebraicgeometry,theproblemofcharacteristicpolynomialassignmentistransferredtotheonewhetherarationalmappingisonto.SufficientconditionsforalmostarbitraryassignmentcoefficientsofcharacteristicpolynomialinF-MmodelⅡof2-Dsystemsviastatefeedbackarederived,andtheyareavailableformulti-inputcases.Italsohasbeenshownthatthismethodcanbeappliedtoassignthecharacteristicpolynomialwithoutputfeedback.Thesufficientconditionsforalmostarbitraryassignmentcoefficientsofcharacteristicpolynomialofmulti-input2-DsystemsdescribedbyF-MmodelⅡwithoutputfeedbackareestablished.