Landsat 8影像水邊線提取方法比較研究
發(fā)布時(shí)間:2018-12-12 21:04
【摘要】:傳統(tǒng)的海岸線調(diào)繪方法比較費(fèi)時(shí)、費(fèi)力,而且資金消耗巨大,因而會(huì)逐漸被遙感技術(shù)所取代。本文利用Landsat 8的OLI數(shù)據(jù)提取長江入?谔幍木哦紊乘吘。由于水體、土壤等地物的光譜特征不同,所以可以選擇不同的方法進(jìn)行提取。本文選用了灰度閾值法、邊緣檢測法中的Soble算子和Roberts算子、改進(jìn)的歸一化水體差異指數(shù)(MNDWI)等方法對水邊線進(jìn)行提取研究,并對結(jié)果進(jìn)行比較分析。發(fā)現(xiàn)Landsat 8中的第一波段有利于水邊界線提取,邊緣檢測中的Soble算子提取的九段沙水邊線可以得到較好的結(jié)果。
[Abstract]:The traditional shoreline mapping method is time-consuming, laborious and expensive, so it will be replaced by remote sensing technology. In this paper, the Landsat 8 OLI data are used to extract the sand and water boundary of Jiuduan at the mouth of the Yangtze River. Because the spectral characteristics of water and soil are different, different methods can be used to extract them. In this paper, the grayscale threshold method, the Soble operator and the Roberts operator in the edge detection method and the improved normalized water difference index (MNDWI) are used to extract the water edge, and the results are compared and analyzed. It is found that the first band in Landsat 8 is beneficial to the extraction of water boundary, and the Soble operator in edge detection can get better results.
【作者單位】: 山東科技大學(xué)測繪科學(xué)與工程學(xué)院;山東省3S工程技術(shù)研究中心;山東省基礎(chǔ)地理信息與數(shù)字化技術(shù)重點(diǎn)實(shí)驗(yàn)室;
【分類號(hào)】:P237
[Abstract]:The traditional shoreline mapping method is time-consuming, laborious and expensive, so it will be replaced by remote sensing technology. In this paper, the Landsat 8 OLI data are used to extract the sand and water boundary of Jiuduan at the mouth of the Yangtze River. Because the spectral characteristics of water and soil are different, different methods can be used to extract them. In this paper, the grayscale threshold method, the Soble operator and the Roberts operator in the edge detection method and the improved normalized water difference index (MNDWI) are used to extract the water edge, and the results are compared and analyzed. It is found that the first band in Landsat 8 is beneficial to the extraction of water boundary, and the Soble operator in edge detection can get better results.
【作者單位】: 山東科技大學(xué)測繪科學(xué)與工程學(xué)院;山東省3S工程技術(shù)研究中心;山東省基礎(chǔ)地理信息與數(shù)字化技術(shù)重點(diǎn)實(shí)驗(yàn)室;
【分類號(hào)】:P237
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