遥感信息
遙感信息
요감신식
2015年
2期
36-42
,共7页
形态学方法%结构元%形态学剖面线%遥感影像%分类精度
形態學方法%結構元%形態學剖麵線%遙感影像%分類精度
형태학방법%결구원%형태학부면선%요감영상%분류정도
morphological method%structuring element%morphological profile%remote sensing image%classification accuracy
针对不同形态学方法和结构元对于形态学剖面线遥感影像分类精度的影响存在较大差异，而国内外在这方面缺乏深入研究的不足，该文选取了武汉市两个实验区，构造了32个形态学剖面线，对研究区的 QuickBird影像进行了分类。通过总体精度、Kappa 系数和剖面线分类结果图，比较了不同形态学剖面线对于分类结果的影响。结果表明：在结构元形状相同的情况下，先开运算后闭运算和先闭运算后开运算在分类精度方面明显优于一般方法和其他两种形态学方法，能够比较清晰地提取出小斑块地物特征；当形态学方法为闭运算和开运算的时候，八边形结构元对应的结果精度最高；当形态学方法为先开运算后闭运算和先闭运算后开运算时，除了方形结构元，其他结构元得到结果精度都较高。
針對不同形態學方法和結構元對于形態學剖麵線遙感影像分類精度的影響存在較大差異，而國內外在這方麵缺乏深入研究的不足，該文選取瞭武漢市兩箇實驗區，構造瞭32箇形態學剖麵線，對研究區的 QuickBird影像進行瞭分類。通過總體精度、Kappa 繫數和剖麵線分類結果圖，比較瞭不同形態學剖麵線對于分類結果的影響。結果錶明：在結構元形狀相同的情況下，先開運算後閉運算和先閉運算後開運算在分類精度方麵明顯優于一般方法和其他兩種形態學方法，能夠比較清晰地提取齣小斑塊地物特徵；噹形態學方法為閉運算和開運算的時候，八邊形結構元對應的結果精度最高；噹形態學方法為先開運算後閉運算和先閉運算後開運算時，除瞭方形結構元，其他結構元得到結果精度都較高。
침대불동형태학방법화결구원대우형태학부면선요감영상분류정도적영향존재교대차이，이국내외재저방면결핍심입연구적불족，해문선취료무한시량개실험구，구조료32개형태학부면선，대연구구적 QuickBird영상진행료분류。통과총체정도、Kappa 계수화부면선분류결과도，비교료불동형태학부면선대우분류결과적영향。결과표명：재결구원형상상동적정황하，선개운산후폐운산화선폐운산후개운산재분류정도방면명현우우일반방법화기타량충형태학방법，능구비교청석지제취출소반괴지물특정；당형태학방법위폐운산화개운산적시후，팔변형결구원대응적결과정도최고；당형태학방법위선개운산후폐운산화선폐운산후개운산시，제료방형결구원，기타결구원득도결과정도도교고。
Different morphological methods and structuring elements have great influence on classification accuracy of remote sensing images.There is no further research about this in domestic and abroad.Here we choose two research areas from Wuhan,using four kinds of morphological methods which are opening operator,closing operator,opening-closing operator and closing-opening operator and four structuring elements which are diamond,disk,octagon,and square to construct 32 morphological profiles.The QuickBird image classification experiment was carried out in two study areas.The effect of different morphological profiles on classification results based on overall accuracy and Kappa coefficient was compared.The results show that,the opening-closing operator and closing-opening operator have great advantages over ordinary method and other two morphological methods on classification accuracy and they can clearly extract small plaque features;when the structuring element is octagon,the features of small patches are easily to be left out and the original points will be easily replaced by others;when the morphological methods are closing operator and opening operator,the classification accuracy of octagon is the highest;when the morphological methods are closing-opening operator and opening-closing operator,the classification accuracy of all the structuring elements is good except for square element,and the accuracy of diamond element is the highest among these four elements.
