一种基于图像分割和图像拼接技术的全天空云量估计方法
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摘要
云点识别和全天空图像获取是地基光学全天空测云技术的两个关键问题。针对现有云点识别方法对薄云和淡云的识别偏少或漏检的情况,提出了饱和度空间基于数学期望的改进云图分割方法;针对现有全天空云图获取畸变较大的情况,提出了基于非水平面投影思想的改进图像拼接方法。通过对拍摄云图的云量进行估算与拼接处理实验分析可知,本文方法对于全天空云量估计更符合人工目测结果。
Pixels classification of cloud images and acquirement of whole-sky cloud images are two important aspects of ground-based cloud observation instruments. To improve the accuracy of pixel classification of cloud images and minimize distortion of whole-sky image,approaches of image segmetation in HSI colorspace based on mathematics expection and whole-sky image obtained by image mosaic based on non-project to plane transformation. Theory analyzing and experiments results demonstrate the effectiveness of approaches present here.
Pixels classification of cloud images and acquirement of whole-sky cloud images are two important aspects of ground-based cloud observation instruments. To improve the accuracy of pixel classification of cloud images and minimize distortion of whole-sky image,approaches of image segmetation in HSI colorspace based on mathematics expection and whole-sky image obtained by image mosaic based on non-project to plane transformation. Theory analyzing and experiments results demonstrate the effectiveness of approaches present here.
引文
[1]LongCN,SabburgJM,CalboJ,etal.Retrievingcloudcharacteristicsfromground-baseddaytimecolorall-skyimages[J].JAtmosOceanTechnol,2006,23(5):633-652.
[2]高太长,刘磊,赵世军等.全天空测云技术现状及进展[J].应用气象学报,2010,21(1):101-109.GaoTC,LiuL,ZhaoSJ,etal.TheActualityandProgressofWholeSkyCloudSoundingTechniques[J].JournalofAppliedMeteorologicalScience,2010,21(1):101-109.
[3]ShieldsJE,JohnsonRW,KarrME,etal.DaylightVisible/NIRWhole-skyImagersforCloudandRadianceMonitoringinSupportofUVResearchPrograms[C]//ProcSPIE.2003,5156:155-166.
[4]Souza-EcherMP,PereirAEB,BinsLS,etal.Asimplemethodfortheassessmentofthecloudcoverstateinhigh-latituderegionsbyaground-baseddigitalcamera[J],JAtmosOceanTechnol,2006,23(3):437-447.
[5]CazorlaA,OlmoFJ,Alados-ArboledasL.Developmentofaskyimagerforcloudcoverassessment.JOptSocAmA,2008,25(1):29-39.
[6]OtsuN,AThresholdSelectionMethodfromgraylevelhistogram[J].IEEETrans.Syst.Man.Cyben,1979,SMC-8:62-66.
[7]PUNT.Anewmethodforgray-levelpicturethresholdingusingtheentropyofhistorgram[J].SignalProcessing1980:2(3),223-237.
[8]尹沧涛,何平等,基于图像序列期望特征的阈值分割方法[J].计算机应用研究,2012,24(1):376-378.YinCT,HeP,DaiP,etal.Thresholdsegmentationmethodbasedonexpectedcharacteristicofimagequeue[J],2012,24(1):376-378.
[9]战勇强,周立佳,徐冠雷.基于图像分割的云量估计.已投稿.ZhanYQ,ZhouLJ,XuGL.CloudCoverEstimationBasedonImageSegmentation.Submitted.
[10]GardinerBG,KirschPJ.SettingStandardsforEuropeanUltravioletSpectoroadiometers[R].ECAirPollutionReportNo.53.CommissionofEuropeanCommunities.Luxembourg,1995:138.
[11]霍娟,吕达仁.全天空数字相机观测云量的初步研究[J].南京气象学院学报,2002,25(20):242-245.HuoJ,LvDR.PreliminaryStudyonCloud-CoverUsinganAll-SkyDigitalCamera[J].JOURNALOFNANJINGINSTITUTEOFMETEOROLOGY,2002,25(20):242-245.
[12]万霞,霍娟,吕达仁.基于全天空图像的投影变换算法实现[C].S8大气探测与仪器新技术、新方法,2012.WanX,HuoJ,LvDR.RealizationofProjectionTransformationbasedonwholeskyimage.[C].S8AtmoshpereDetectionandNewTechnologyandNewMethods,2012
[13]英向华,胡占义.一种基于球面透视投影约束的鱼眼镜头校正方法[J].计算机学报,2003,26(12):1702-1708.YingXH,HuZY.FisheyeLenseDistortionCorrectionUsingSphericalPerspectiveProjectionConstraint[J].CHINESEJOURNALOFCOMPUTERS,2003,26(12):1702-1708.
[14]杨玲,成运,应用经纬映射的鱼眼图像校正设计方法[J].工程图学学报,2010,(6):19-22.YangL,ChengY.TheDesigningMethodsofFish-eyeDistortionCorrectionUsingLatitude-longitudeProjection[J].JournalofEngineeringGraphics,2010,(6):19-22.
[15]吴桂萍,吴巍,王成,毕昆.基于双线性插值的鱼眼图像校正方法[J].计算机应用与软件,2012,29(2):122-124.WuGP,WuW,WangC,etal.AFisheyeImageCorrectionMethodBasedonBilinearInterpolation[J].ComputerApplicationsandSoftware,2012,29(2):122-124.
[16]LongCN,SlaterDW,ToomanT.TotalSkyImagerModel880StatusandtestingResults[R].ARMTechnicalReportARMTR-006,USDepartmentofEnergy,WashingtonDC.2001.
[17]PfisterG,RLMc Kenzie,JBLiley,etal.Cloudcoveragebasedonall-skyimaginganditsimpactonsurfacesolarirradiance[J].J.Appl.Meteor.2003,42:1421-1434.
[18]孙晓钢,孙学金,牛珍聪,高太长.全天空云图获取的一种方式及算法实现[J].气象科学,2008,28(3),338-341.SunXG,SunXJ,NiuZC,etal.Amethodofcapturingwhole-skynephogramanditsarithmeticactualization[J].SCIENTIAMETEOROLOGICASINICA,2008,28(3),338-341.
[19]孙学金,高太长,翟东力等.基于非制冷红外焦平面阵列的全天空红外测云系统[J].红外与激光工程,2008,37(5):761-764.SunXJ,GaoTC,ZaiDL,etal.Wholeskyinfraredcloudmeasuringsystembasedontheuncooledinfraredfocalplanearray[J].INFRAREDANDLASERENGINEERING,2008,37(5):761-764.
[20]《数学手册》编写组.数学手册[R].高等教育出版社.1977,12:48-52.MathematicsHandbookWritingGroup.MathematicsHandbook[R]HigherEducationPress,1977,12:48-52.
[21]李晓辉,周荫清,王祖林.基于曲面拼接的球面全景生成算法[J].北京航空航天大学学报,2007,33(6):668-671.LiXH,ZhouYQ,WangZL.Sphericalpanoramacreatingalgorithmbasedoncurvesurfacemosaic[J].JournalofBeijingUniversityofAeronauticsandAstronautics,2007,33(6):668-671.
[22]王新年,张涛,张毓良.改进的基于SIFT和RANSAC的图像配准方法[J].新型工业化,2011,1(6):72-77.WANGXinnian,ZHANGTao,ZHANGYuliang.AnimprovedimageregistrationmethodbasedonSIFTandRANSAC[J].TheJournalofNewIndustrialization,2011,1(6):72-77.
[23]黄全亮,孙坤,刘水清.超分辨率技术对基于特征图像配准算法的影响[J].新型工业化,2011,1(4):1-7.HUANGQuanliang,SUNKun,LIUShuiqing.Infulenceofusingsuper-resolutioninfeature-basedimageregistration[J].TheJournalofNewIndustrialization,2011,1(4):1-7.
[2]高太长,刘磊,赵世军等.全天空测云技术现状及进展[J].应用气象学报,2010,21(1):101-109.GaoTC,LiuL,ZhaoSJ,etal.TheActualityandProgressofWholeSkyCloudSoundingTechniques[J].JournalofAppliedMeteorologicalScience,2010,21(1):101-109.
[3]ShieldsJE,JohnsonRW,KarrME,etal.DaylightVisible/NIRWhole-skyImagersforCloudandRadianceMonitoringinSupportofUVResearchPrograms[C]//ProcSPIE.2003,5156:155-166.
[4]Souza-EcherMP,PereirAEB,BinsLS,etal.Asimplemethodfortheassessmentofthecloudcoverstateinhigh-latituderegionsbyaground-baseddigitalcamera[J],JAtmosOceanTechnol,2006,23(3):437-447.
[5]CazorlaA,OlmoFJ,Alados-ArboledasL.Developmentofaskyimagerforcloudcoverassessment.JOptSocAmA,2008,25(1):29-39.
[6]OtsuN,AThresholdSelectionMethodfromgraylevelhistogram[J].IEEETrans.Syst.Man.Cyben,1979,SMC-8:62-66.
[7]PUNT.Anewmethodforgray-levelpicturethresholdingusingtheentropyofhistorgram[J].SignalProcessing1980:2(3),223-237.
[8]尹沧涛,何平等,基于图像序列期望特征的阈值分割方法[J].计算机应用研究,2012,24(1):376-378.YinCT,HeP,DaiP,etal.Thresholdsegmentationmethodbasedonexpectedcharacteristicofimagequeue[J],2012,24(1):376-378.
[9]战勇强,周立佳,徐冠雷.基于图像分割的云量估计.已投稿.ZhanYQ,ZhouLJ,XuGL.CloudCoverEstimationBasedonImageSegmentation.Submitted.
[10]GardinerBG,KirschPJ.SettingStandardsforEuropeanUltravioletSpectoroadiometers[R].ECAirPollutionReportNo.53.CommissionofEuropeanCommunities.Luxembourg,1995:138.
[11]霍娟,吕达仁.全天空数字相机观测云量的初步研究[J].南京气象学院学报,2002,25(20):242-245.HuoJ,LvDR.PreliminaryStudyonCloud-CoverUsinganAll-SkyDigitalCamera[J].JOURNALOFNANJINGINSTITUTEOFMETEOROLOGY,2002,25(20):242-245.
[12]万霞,霍娟,吕达仁.基于全天空图像的投影变换算法实现[C].S8大气探测与仪器新技术、新方法,2012.WanX,HuoJ,LvDR.RealizationofProjectionTransformationbasedonwholeskyimage.[C].S8AtmoshpereDetectionandNewTechnologyandNewMethods,2012
[13]英向华,胡占义.一种基于球面透视投影约束的鱼眼镜头校正方法[J].计算机学报,2003,26(12):1702-1708.YingXH,HuZY.FisheyeLenseDistortionCorrectionUsingSphericalPerspectiveProjectionConstraint[J].CHINESEJOURNALOFCOMPUTERS,2003,26(12):1702-1708.
[14]杨玲,成运,应用经纬映射的鱼眼图像校正设计方法[J].工程图学学报,2010,(6):19-22.YangL,ChengY.TheDesigningMethodsofFish-eyeDistortionCorrectionUsingLatitude-longitudeProjection[J].JournalofEngineeringGraphics,2010,(6):19-22.
[15]吴桂萍,吴巍,王成,毕昆.基于双线性插值的鱼眼图像校正方法[J].计算机应用与软件,2012,29(2):122-124.WuGP,WuW,WangC,etal.AFisheyeImageCorrectionMethodBasedonBilinearInterpolation[J].ComputerApplicationsandSoftware,2012,29(2):122-124.
[16]LongCN,SlaterDW,ToomanT.TotalSkyImagerModel880StatusandtestingResults[R].ARMTechnicalReportARMTR-006,USDepartmentofEnergy,WashingtonDC.2001.
[17]PfisterG,RLMc Kenzie,JBLiley,etal.Cloudcoveragebasedonall-skyimaginganditsimpactonsurfacesolarirradiance[J].J.Appl.Meteor.2003,42:1421-1434.
[18]孙晓钢,孙学金,牛珍聪,高太长.全天空云图获取的一种方式及算法实现[J].气象科学,2008,28(3),338-341.SunXG,SunXJ,NiuZC,etal.Amethodofcapturingwhole-skynephogramanditsarithmeticactualization[J].SCIENTIAMETEOROLOGICASINICA,2008,28(3),338-341.
[19]孙学金,高太长,翟东力等.基于非制冷红外焦平面阵列的全天空红外测云系统[J].红外与激光工程,2008,37(5):761-764.SunXJ,GaoTC,ZaiDL,etal.Wholeskyinfraredcloudmeasuringsystembasedontheuncooledinfraredfocalplanearray[J].INFRAREDANDLASERENGINEERING,2008,37(5):761-764.
[20]《数学手册》编写组.数学手册[R].高等教育出版社.1977,12:48-52.MathematicsHandbookWritingGroup.MathematicsHandbook[R]HigherEducationPress,1977,12:48-52.
[21]李晓辉,周荫清,王祖林.基于曲面拼接的球面全景生成算法[J].北京航空航天大学学报,2007,33(6):668-671.LiXH,ZhouYQ,WangZL.Sphericalpanoramacreatingalgorithmbasedoncurvesurfacemosaic[J].JournalofBeijingUniversityofAeronauticsandAstronautics,2007,33(6):668-671.
[22]王新年,张涛,张毓良.改进的基于SIFT和RANSAC的图像配准方法[J].新型工业化,2011,1(6):72-77.WANGXinnian,ZHANGTao,ZHANGYuliang.AnimprovedimageregistrationmethodbasedonSIFTandRANSAC[J].TheJournalofNewIndustrialization,2011,1(6):72-77.
[23]黄全亮,孙坤,刘水清.超分辨率技术对基于特征图像配准算法的影响[J].新型工业化,2011,1(4):1-7.HUANGQuanliang,SUNKun,LIUShuiqing.Infulenceofusingsuper-resolutioninfeature-basedimageregistration[J].TheJournalofNewIndustrialization,2011,1(4):1-7.