简介:WorkhasbeendonewithextendingtheusefulimaginganddetectionrageofCCD.ThiswasaccomplishedthroughdirectopticalcouplingandbondingofimageintensifierstotheCCD.IthasbeenshownthattheusefulrangeofaCCDmaybeextendedtwoordersofmagnitudeusingthesetechniquesincouplingamicrochannelplateimageintensifiertotheCCDarray.AlloftheseworksweredonewithpresentlyavailableCCDmadebyChina
简介:InordertoevaluatetheimagingqualityofCCDcamerasfullyandrapidly,theminimumresolvablecontrast(MRC)ispresentedinthispaperandthesystemofmeasuringMRCisconstructedaswell,inwhichtwointegratingspheresareproposedtoilluminatetwosidesofthetargetrespectively.Thevariablecontrastcanbeobtainedbyregulatingtheluminanceofintegratingspheres.Experimentalresultsindicatethattheerrorofmeasuringluminanceiswithin±0.3cd/m2,MRCriseswiththeincreaseofthespatialfrequency.TheexperimentalresultsshowthatthemethodproposedisaneffectiveapproachtoevaluatetheimagingqualityofCCDcameras.
简介:Anew128×128elementPtSiSchottkybarrierinfraredimagesen-sorwithITCCDreadortstructureandPtSithinfilmopticalcavitydetectorstruc-turehasbeenfabricated,whichhas50цm×50цmpixels,afillfactorof40per-cent,thenonuniformityof5%orlessandthedynamicrangeofoverorequalto50dB.Thenoiseequivalenttemperaturedifferenceis0.2Kwithf/1.0opticsat300Kbackground.Inthispaper,theprincipleofoperation,designconsiderationandfabric-cationtechnologyforthedevicearedescribed.
简介:Duringthelastdecade,spatio-temporaldatabaseshavebecomeincreasinglyimportantinmanyapplicationssuchasgeographicinformationsystems(GIS)andengineeringinformationsystems.Thispaperdiscussesthedesignandimplementationofageocomputingplatformforthedevelopmentoflocation-basedservices(LBS)focusingonmobilemapping.Duringtheanalysis,design,andimplementationofthegeocomputingplatform,aneffectivemethodisproposedforthereal-timeprocessingofgeographicinformationacquiredbyacameraattachedtoapersonaldigitalassistant(PDA).Thismethodcombineslocationinformationgivenbytheglobalpositionsystem(GPS)withman’sabilitytorecognizethelocationofobjectsandtheirgeographicalrelationshiptoimproveobjectmapping.
简介:Usingcomputer-controlledliquidcrystaldisplay(LCD)asanimageprocessorandaCCDcameraasadetector,phase-onlycorrelationmeasurementisperformedwiththeaidofjointtransformcorrelationmethod(JTC).Thiscomputer-controlledLCD-CCDimageprocessingsystemmaybeapowerfultoolfordefectdetection,positioncontrolandpatternrecognition.Itenablesnewpossibilitiesinanalogreal-timeimageprocessing.Thisisofgreatinterestinmicroelectronicmanufacturingtodayandinthefuture.
简介:因为紫外可见的吸收度察觉者不能避免的一般多波长源于光的紧张变化的噪音和飘移采购原料,双横梁多波长紫外可见的察觉者基于电荷耦合器件被设计。在它通过chopper以后,轻来源的光线被横梁splitter划分成一条信号光线和一条引用光线。信号光线照耀进样品房间。通过样品房间的信号光线失败到集中它到被一个凹面栅栏在电荷耦合器件的一部分上想象的槽上的一面凹面镜子上。参考光线被凹面栅栏在槽以后在电荷耦合器件的另外的部分上想象。信号光谱,引用光谱和电荷耦合器件的黑暗水流能在光系统的合作下面在一样的电荷耦合器件上被测量并且补助电路。为由使用参考光谱和电荷耦合器件的黑暗水流的信号光谱的即时赔偿能有效地压抑察觉者的噪音和飘移。短期的噪音是10?5AU和飘移是10?4AU/h。CLC数字TN366文件代码A
简介:AmeasurementsystemwiththeCCDmatrixandcomputersystemisdesignedtotestthe2Dsizeofanyshapeworkpiecesautomatically.Inaddition,thesystemadoptsthemethodoftherelativemeasurementwhichincreasestheprecisionandthevelocity.Moreimportantly,theprecisioncan'tbechangedwiththeconditionsofthetemperatureandairpressure.Theexperimentsshowthattherelativeprecisionof0.0029andtheabsoluteprecisionof2.97μmareobtained.Theinstrumentmaybeusedintheproductlineandmakethetestingonlinepossible.
简介:首先,使用新型压缩感知框架对图像进行基于小波的轮廓波变换(WBCT);然后,采用部分傅里叶矩阵随机观测子空间系数;最后,结合软阈值贪婪方向追踪(SGDP)算法完成图像重构。试验结果表明,与传统的稀疏梯度投影(GPSR)算法相比,基于软阈值贪婪方向追踪的图像重构法在恢复图像低频信息的同时保留了高频信息,尤其对于含噪图像重构,可使重构图像峰值信噪比(PSNR)值提高约2dB。
简介:针对传统光学遥感图像近岸舰船检测方法不能处理大场景图像问题,提出了一种新的大场景近岸舰船检测方法。该方法采取分块处理策略,利用粗海陆分割方法筛选有效检测区域块,以缩小目标检测范围和提高检测效率。在检测结果合并阶段,采用0-1整数规划方法进行融合建模,并根据约束集对模型进行拆分,从而提高了结果融合效率。试验结果表明该方法具有较高的近岸舰船检测效率。