海洋遥感彩色图像中的海洋数据读取技术

基于对海洋遥感彩色图像的像素点数据矩阵的理解,提出了一种基于MATLAB软件的海洋遥感数据读取技术.依据这项技术,用户可以从卫星遥感获取的各种海洋要素彩色图像中读取对应于各个像素点的海洋要素数据.在MATLAB软件中,图像是由像素点构成的,全部图像信息均以矩阵的形式存储和运算.一幅图像可能包含一个数据矩阵和一个颜色映射表矩阵.用户可使用MATLAB软件读入图像,并通过所读取图像中包含的数据矩阵和颜色映射表矩阵,将图像区域中的像素点的颜色与色标中的颜色进行比较来获得像素点所表示的海洋要素数据.以一幅东中国海海域的海表面温度(SST)彩色图像实例说明了如何应用该技术来提高遥感彩色图像信息的读取能力.

Oceanic data retrieval from oceanic remote sensing color images

A technique for oceanic data retrieval from oceanic remote sensing color images based on the MATLAB software was introduced in the paper.Data can be acquired from the oceanic remote sensing color images by using the technique.The main method of the technique was to compare the color of each pixel with colors in color bar by using MATLAB.MATLAB stored images as arrays,in which each element of the matrix corresponded to a single pixel in the displayed image.Based on the technique,an image was read by MATLAB and stored as an array,and then color of each pixel was determined by comparing its value with the value of the pixel in the color bar of the image. The value of oceanic element in the area represented by the pixel equaled the value indicated by the same color in color bar.As an example,a daily averaged sea surface temperature(SST) color image for the East China Sea was taken for retrieving and SST data was obtained from the image by using the technique.