Separation of Rock Information from Remote Sensing Data Using Masking Technique and Step_wise Orthogonal Transformation Algorithm
利用掩膜和多因子逐步正交变换区分遥感数据中的岩性信息

Itis provedthatsome effectshave come outforrockinformation separationfrom remotesensing data usingthe principalcomponentanalysis.New information,relatively weak ,isrevealed bytwo_componentscatter_plotclassification , butit does notoccurin the centerarea ofthe aggregation .These phenomenaindicate thatthere are some other relative weak featuresin multi_band remote sensing raw data ,beside main features presented by the principal componentanaly sis.The principalcomponentanalysisis onlyone resultoflineartransformation .In orderto derive more potentialinforma tion from multi_band raw data ofremote sensing,the step_wise orthogonaltransformation software is developed to extract potentialinformation ofrocktypes. Meanwhile ,the maskingtechniqueis usedto getrid oftheinterference of water body and dry riverfrom theraw data.Goodresultsare achieved andthe methodisalso usedin other placesofthe Huabeiplat form rim .