随着航天航空遥感技术的飞速发展,立体式、多层次、多视角、全方位和全天候对地观测的时代已然到来。如何激活数据价值,更好地服务行业应用,满足快速增长的遥感应用需求,成为遥感企业面临的迫切课题。遥感图像处理软件作为遥感数据与行...随着航天航空遥感技术的飞速发展,立体式、多层次、多视角、全方位和全天候对地观测的时代已然到来。如何激活数据价值,更好地服务行业应用,满足快速增长的遥感应用需求,成为遥感企业面临的迫切课题。遥感图像处理软件作为遥感数据与行业应用的桥梁,在遥感产业化过程中发挥着不可替代的作用。本文概述了国内外遥感卫星数据和遥感软件发展历程,通过中国国产遥感图像处理软件——像素专家(pixel information expert,PIE)阐述了国产遥感软件的研制进展、典型应用和未来技术发展方向。PIE软件具有多源遥感载荷全方位支持、全谱段要素信息智能提取、多行业全业务链深度融合、海量遥感数据快速处理和自主产权程序完全可控等5大核心能力。未来将加强与大数据、云计算和人工智能等技术前沿领域的交叉融合,提升遥感数据分析处理、知识挖掘与决策支持能力,实现遥感数据的按需获取快速传输和专题信息聚焦服务。展开更多
The vegetation has been poisoned by gold in the western Guangdong-Hainan region. The gold content ofthe leaves there is as high as 10-1961 times the abundance, the chlorophyll content is 10%-30% lower thanthat of the ...The vegetation has been poisoned by gold in the western Guangdong-Hainan region. The gold content ofthe leaves there is as high as 10-1961 times the abundance, the chlorophyll content is 10%-30% lower thanthat of the vegetation in metamorphic terrains and 10%-20% higher than that in granite terrains, and thecarotenoid content is 10%-44% lower than the background value. The water content of leaves is 10% to 20%lower than the background value. The cells of leaves are deformed and broken. The leaf surface shows colourspots and becomes yellow or dark green. The spectral reflectance of the leaf surface is 5%-30% higher than thebackground value: the spectral shape has shifted 5-15 nm to the short wavelength. The gray scales of eanopyon images of Landsat TM and airborne imaging scanner (AIS) are 10%-100% higher than the backgroundvalues. On Landsat TM and AIS false colour images, plants poisoned by gold display a yellow color, whichdisinguishes them from background plants. According to the spectral and image features of goldbiogeochemical effects, the author has constructed a gold information system and expert prediction system,and thus two gold target areas and two gold prospect areas have been identified rapidly, economically andaccurately in the western Guangdong-Hainan region which is extensively covered by vegetation.展开更多
准确、及时地了解作物种植结构和信息在粮食安全、经济到政治等人类活动的许多方面都发挥着至关重要的作用。基于结合面向对象随机森林算法(Random forest,RF)和一站式地球科学大数据实时计算平台(Pixel Information Expert-Engine),探...准确、及时地了解作物种植结构和信息在粮食安全、经济到政治等人类活动的许多方面都发挥着至关重要的作用。基于结合面向对象随机森林算法(Random forest,RF)和一站式地球科学大数据实时计算平台(Pixel Information Expert-Engine),探讨了结合面向对象随机森林算法与时间序列哨兵1号合成孔径雷达(SAR)数据后向散射系数对大规模作物分类的影响,并结合哨兵1号和哨兵2号主被动遥感数据,探讨植被指数特征和纹理特征的不同组合对后向散射系数、光谱特征和作物分类精度的提高。结果表明,结合面向对象随机森林算法,可明显削弱分类的椒盐效果,且基于融合时间序列的多特征SAR和光学数据的分类精度最高,SAR数据的分类精度最低。本研究采用的方法和平台能够准确、高效地进行土地利用分类工作,具有很好的推广价值。展开更多
文摘随着航天航空遥感技术的飞速发展,立体式、多层次、多视角、全方位和全天候对地观测的时代已然到来。如何激活数据价值,更好地服务行业应用,满足快速增长的遥感应用需求,成为遥感企业面临的迫切课题。遥感图像处理软件作为遥感数据与行业应用的桥梁,在遥感产业化过程中发挥着不可替代的作用。本文概述了国内外遥感卫星数据和遥感软件发展历程,通过中国国产遥感图像处理软件——像素专家(pixel information expert,PIE)阐述了国产遥感软件的研制进展、典型应用和未来技术发展方向。PIE软件具有多源遥感载荷全方位支持、全谱段要素信息智能提取、多行业全业务链深度融合、海量遥感数据快速处理和自主产权程序完全可控等5大核心能力。未来将加强与大数据、云计算和人工智能等技术前沿领域的交叉融合,提升遥感数据分析处理、知识挖掘与决策支持能力,实现遥感数据的按需获取快速传输和专题信息聚焦服务。
文摘The vegetation has been poisoned by gold in the western Guangdong-Hainan region. The gold content ofthe leaves there is as high as 10-1961 times the abundance, the chlorophyll content is 10%-30% lower thanthat of the vegetation in metamorphic terrains and 10%-20% higher than that in granite terrains, and thecarotenoid content is 10%-44% lower than the background value. The water content of leaves is 10% to 20%lower than the background value. The cells of leaves are deformed and broken. The leaf surface shows colourspots and becomes yellow or dark green. The spectral reflectance of the leaf surface is 5%-30% higher than thebackground value: the spectral shape has shifted 5-15 nm to the short wavelength. The gray scales of eanopyon images of Landsat TM and airborne imaging scanner (AIS) are 10%-100% higher than the backgroundvalues. On Landsat TM and AIS false colour images, plants poisoned by gold display a yellow color, whichdisinguishes them from background plants. According to the spectral and image features of goldbiogeochemical effects, the author has constructed a gold information system and expert prediction system,and thus two gold target areas and two gold prospect areas have been identified rapidly, economically andaccurately in the western Guangdong-Hainan region which is extensively covered by vegetation.
文摘准确、及时地了解作物种植结构和信息在粮食安全、经济到政治等人类活动的许多方面都发挥着至关重要的作用。基于结合面向对象随机森林算法(Random forest,RF)和一站式地球科学大数据实时计算平台(Pixel Information Expert-Engine),探讨了结合面向对象随机森林算法与时间序列哨兵1号合成孔径雷达(SAR)数据后向散射系数对大规模作物分类的影响,并结合哨兵1号和哨兵2号主被动遥感数据,探讨植被指数特征和纹理特征的不同组合对后向散射系数、光谱特征和作物分类精度的提高。结果表明,结合面向对象随机森林算法,可明显削弱分类的椒盐效果,且基于融合时间序列的多特征SAR和光学数据的分类精度最高,SAR数据的分类精度最低。本研究采用的方法和平台能够准确、高效地进行土地利用分类工作,具有很好的推广价值。
