“航天清华一号”微小卫星及其图像处理
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摘要
介绍了“航天清华一号”微小卫星的研究背景和主要技术指标。讨论了星上图像智能处理的方案 ,包括云检测和图像压缩两个部分 ,并介绍了地面的图像处理工作
In this paper, we introduce the research background and key technical parameters of “Hangtian Tsinghua_1” micro_satellite. The scheme of on_board image intelligent processing, which includes cloud detection and image compression, is discussed in detail. Cloud detection is based on the cloud's brightness character and we use gray threshold method to achieve image segmentation through the analysis of image histogram. Image compression method is a mend of Block Truncation Coding method that implements three_level compression according to the activity of the image block. All on_board image processing tasks are fulfilled by the Transputer processor. The image processing work on the ground mainly including noise removal and image correction is discussed in the end.
In this paper, we introduce the research background and key technical parameters of “Hangtian Tsinghua_1” micro_satellite. The scheme of on_board image intelligent processing, which includes cloud detection and image compression, is discussed in detail. Cloud detection is based on the cloud's brightness character and we use gray threshold method to achieve image segmentation through the analysis of image histogram. Image compression method is a mend of Block Truncation Coding method that implements three_level compression according to the activity of the image block. All on_board image processing tasks are fulfilled by the Transputer processor. The image processing work on the ground mainly including noise removal and image correction is discussed in the end.
引文
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[2 ] MoikJG .DigitalProcessingofRemoteSensingImage [M] .Beijing :MeteorologyPress,1987.[J.G .莫伊克 .遥感图像的数字处理[M] .北京 :气象出版社 ,1987.]
[3 ] DongseokShin ,JohnKPollard .ClouddetectionfromATSRimagesusingasegmentationtechniques [J] .SPIE ,1995 ,2 5 78:46— 5 2 .
[4] LiZhirong ,McodonnellMJ.Usingdualthresholdsforcloudandmo saicking [J] .Int.J .Remotesensing ,1986,7(10 ) :13 4 9— 13 5 8.
[5 ] JosephShou_PyngShu .Cloudshadowremovalfromaerialphotographs[J] .PatternRecognition ,1990 ,2 3 (6) :64 7— 65 6.
[6] SaundersRW .Anautomatedschemefortheremovalofcloudconta_minationfromAVHRRradiancesoverwesternEurope [J] .Int.J .Remotesensing ,1986,7(7) :867— 886.
[7] NingShunian ,L櫣Songtang.ProcessingandApplicationofRemoteSensingImage [M] .Beijing :SeismologyPress,1995 .[宁书年 ,吕松棠 .遥感图像处理与应用 [M] .北京 :地震出版社 ,1995 .]
[8] WangRunsheng .ImageComprehension [M] .Changsha :NationalUniversityofDefenseTechnologyPress,1995 .[王润生 .图像理解[M] .长沙 :国防科技大学出版社 ,1995 .]
[9] JiaXiaoguang ,WangLei.TheNewDevelopmentofCompressionTechniqueforAstronauticRemoteSensingImage [J] .ChinaJournalofImageandGraphics,1997,10 (10 ) :677— 70 0 .[贾晓光 ,王雷 .航天遥感图像压缩技术的最新发展 [J] .中国图像图形学报 ,1997.10 (10 ) :677— 70 0 .]
[10 ] LiQiang ,WangZhengzhi.ACompressionMethodforRemoteSen_singImage [J] .JournalofRemoteSensing ,1999,2 (1) ,3 1— 3 7.[李强 ,王正志 .基于小波理论的遥感图像高保真压缩方法研究 [J] .遥感学报 ,1999,2 (1) ,3 1— 3 7.]
[11] ZhouXiaokuan ,ZhangJing .RemoteSensingImageCompressionBasedontheMulti_ModeAdaptiveQuantification [J] .ChinaJournalofImageandGraphics,1997,5 (2 ,3 ) ,99— 10 2 .[周孝宽 ,张京 .遥感图像多模式自适应压缩法 [J] .中国图像图形学报 ,1997,5 (2 ,3 ) ,99— 10 2 .]
[12 ] ZhangRong ,LiuZhengkai.ANear_losslessCompressionTechniqueofMulti_spectralImageData [J] .JournalofImageandGraphics,1998,10 (10 ) ,82 3— 82 6.[张荣 ,刘政凯 .一种多光谱遥感图像的近无损压缩方法 [J] .中国图像图形学报 ,1998,10 (10 ) ,82 3— 82 6.]
[13 ] ChengZijing ,ZhouXiaokuan .DevelopmentofthePrototypeofHighSpeedImagecompressionDeviceforSatellite [J] .JournalofBeijingUniversityofAeronauticsandAstronautics ,1999,12 (6) ,743— 746.[程子敬 ,周孝宽 .星载高速图像数据压缩原理样机的研制[J] .北京航空航天大学学报 ,1999,12 (6) ,743— 746.]
[2 ] MoikJG .DigitalProcessingofRemoteSensingImage [M] .Beijing :MeteorologyPress,1987.[J.G .莫伊克 .遥感图像的数字处理[M] .北京 :气象出版社 ,1987.]
[3 ] DongseokShin ,JohnKPollard .ClouddetectionfromATSRimagesusingasegmentationtechniques [J] .SPIE ,1995 ,2 5 78:46— 5 2 .
[4] LiZhirong ,McodonnellMJ.Usingdualthresholdsforcloudandmo saicking [J] .Int.J .Remotesensing ,1986,7(10 ) :13 4 9— 13 5 8.
[5 ] JosephShou_PyngShu .Cloudshadowremovalfromaerialphotographs[J] .PatternRecognition ,1990 ,2 3 (6) :64 7— 65 6.
[6] SaundersRW .Anautomatedschemefortheremovalofcloudconta_minationfromAVHRRradiancesoverwesternEurope [J] .Int.J .Remotesensing ,1986,7(7) :867— 886.
[7] NingShunian ,L櫣Songtang.ProcessingandApplicationofRemoteSensingImage [M] .Beijing :SeismologyPress,1995 .[宁书年 ,吕松棠 .遥感图像处理与应用 [M] .北京 :地震出版社 ,1995 .]
[8] WangRunsheng .ImageComprehension [M] .Changsha :NationalUniversityofDefenseTechnologyPress,1995 .[王润生 .图像理解[M] .长沙 :国防科技大学出版社 ,1995 .]
[9] JiaXiaoguang ,WangLei.TheNewDevelopmentofCompressionTechniqueforAstronauticRemoteSensingImage [J] .ChinaJournalofImageandGraphics,1997,10 (10 ) :677— 70 0 .[贾晓光 ,王雷 .航天遥感图像压缩技术的最新发展 [J] .中国图像图形学报 ,1997.10 (10 ) :677— 70 0 .]
[10 ] LiQiang ,WangZhengzhi.ACompressionMethodforRemoteSen_singImage [J] .JournalofRemoteSensing ,1999,2 (1) ,3 1— 3 7.[李强 ,王正志 .基于小波理论的遥感图像高保真压缩方法研究 [J] .遥感学报 ,1999,2 (1) ,3 1— 3 7.]
[11] ZhouXiaokuan ,ZhangJing .RemoteSensingImageCompressionBasedontheMulti_ModeAdaptiveQuantification [J] .ChinaJournalofImageandGraphics,1997,5 (2 ,3 ) ,99— 10 2 .[周孝宽 ,张京 .遥感图像多模式自适应压缩法 [J] .中国图像图形学报 ,1997,5 (2 ,3 ) ,99— 10 2 .]
[12 ] ZhangRong ,LiuZhengkai.ANear_losslessCompressionTechniqueofMulti_spectralImageData [J] .JournalofImageandGraphics,1998,10 (10 ) ,82 3— 82 6.[张荣 ,刘政凯 .一种多光谱遥感图像的近无损压缩方法 [J] .中国图像图形学报 ,1998,10 (10 ) ,82 3— 82 6.]
[13 ] ChengZijing ,ZhouXiaokuan .DevelopmentofthePrototypeofHighSpeedImagecompressionDeviceforSatellite [J] .JournalofBeijingUniversityofAeronauticsandAstronautics ,1999,12 (6) ,743— 746.[程子敬 ,周孝宽 .星载高速图像数据压缩原理样机的研制[J] .北京航空航天大学学报 ,1999,12 (6) ,743— 746.]
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