A study of a three-dimensional histogram using the NOAA AVHRR images
A study of a three-dimensional histogram using the NOAA AVHRR images
复制标题
使用 NOAA AVHRR 图像的三维直方图研究
DOI：
10.1109/36.83988
复制
发表时间：
1991
期刊：
影响因子：
--
通讯作者：
S. Noguchi
中科院分区：
文献类型：
--
作者：
J. Kudoh;S. Noguchi
讨论了NOAA卫星先进甚高分辨率辐射计(AVHRR)三维分析系统的研制过程中遇到的在二维CRT上绘制三维直方图的问题。在这种情况下，有两个因素：一是 NOAA AVHRR 三个图像通道的亮度级别给出的坐标位置，二是图像内点的频率。为了确定显示处理后的三维直方图的半最佳值，作者尝试将频率和像素总数联系起来。发现标准差是合理的。在使用该方法的分析中，图像主要成分之间的差异显示在三维直方图中，允许通过聚类过程识别海洋、陆地和云等特征。 >
The development of the NOAA satellite Advanced Very High Resolution Radiometer (AVHRR) three-dimensional analysis system, in which the problem of drawing a three-dimensional histogram on a two-dimensional CRT was encountered, is discussed. In this case there are two factors: one is the coordinate position given by the brightness level of the three image channels of NOAA AVHRR, the other is the frequency of the points within the images. To decide the semi-optimum value for displaying the processed three-dimensional histogram, the authors tried to relate the frequency and the total number of pixels. It was found that the standard deviation is reasonable. In the analysis using this method, the differences between major components of the images are displayed in the three-dimensional histogram, allowing the identification of features like sea, land, and clouds by a clustering process. >