How to find the global mean(average)of the entire scene of a hyperion hyperspectral data.

Question

ALINA 2014-1-2

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/111232-how-to-find-the-global-mean-average-of-the-entire-scene-of-a-hyperion-hyperspectral-data

回答： Image Analyst 2014-1-2

 Hyperion Hyperspectral data is a satellite imagewhich contains 242 bands.Each band has 1300columns and 4000 rows of pixels.These pixels give reflectance values.I would like to calculate the global mean of the entire scene.Can you please help me with the matlab code for the same.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Amit 2014-1-2

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/111232-how-to-find-the-global-mean-average-of-the-entire-scene-of-a-hyperion-hyperspectral-data#answer_119875

在 MATLAB Online 中打开

If by global mean, you mean the mean value of the reflectance values throughout the whole bands, then you can do something like this.

mean_band = zeros(242,1);
for i = 1:242 %Loop for each band
   mean_band(i,1) = mean(mean(_data_from_ith_band_);
end
global_mean = mean(mean_band);

How do you have band data stored?

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

Answer 2

Image Analyst 2014-1-2

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/111232-how-to-find-the-global-mean-average-of-the-entire-scene-of-a-hyperion-hyperspectral-data#answer_119886

Define global mean. It sounds ambiguous. Do you want the mean of each spectral band? If so use mean2() in the Image Processing Toolbox. After that you can do some kind of weighted average of all the means if you want.