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PixelGrid在数字高程模型生产中的应用 被引量:1
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作者 张立刚 《黑龙江水利科技》 2020年第10期169-171,共3页
PixelGrid软件是一款应用于高分辨率对地观测卫星遥感影像一体化数据处理的系统,是生产数字表面模型、数字高程模型、数字正射影像、数字线划图等测绘地理信息4D数据产品的一款常用软件。首先,文章针对卫星遥感影像数据在地面接收处理... PixelGrid软件是一款应用于高分辨率对地观测卫星遥感影像一体化数据处理的系统,是生产数字表面模型、数字高程模型、数字正射影像、数字线划图等测绘地理信息4D数据产品的一款常用软件。首先,文章针对卫星遥感影像数据在地面接收处理后存在的个别前、后视影像视差过大问题,制定了两视影像有理多项式系数拟合精度提升并生成数字高程模型的技术路线。最后,以国产资源三号立体卫星影像为试验样本,开展了技术应用与精度分析,为单景数字高程模型生产提供参考。 展开更多
关键词 pixel Grid 数字高程模型 有理多项式系数 地面分辨率
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Image Processing algorithm Based On The Solitary Wave
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作者 ZHU Zi-min LIU Rong-qiang +1 位作者 CAO You-wei LIU Fen-fen 《International Journal of Technology Management》 2013年第2期85-87,共3页
The core algorithm of digital image processing has mainly involved three aspects: random theory, wavelet analysis and partial differential equations. This paper presents a new algorithm, which takes the digital image... The core algorithm of digital image processing has mainly involved three aspects: random theory, wavelet analysis and partial differential equations. This paper presents a new algorithm, which takes the digital image as a pixel grid, and then establishes the dynamic equation that has solitary wave solutions. Moreover, the solution can become analytic so it can be applied to the image directly. Meanwhile, due to the elastic collision properties of the solitary wave, pixel of the same size can produce the same kind of solitary wave, which facilitates a further processing of pixel. The interplay between pixels can be further studied in terms of collision property on account of the nonlinear effect. Analysis of the algorithm shows that solitary wave amplitude characterize the effect between adjacent pixels, and the phase change of solitary waves provide the azimuth information of image. 展开更多
关键词 pixel grid solitary wave COLLISION NONLINEAR
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