How to calculate the mean from different images at once? TBV1 and RVI1 cover each other and have the same size. in the following code I calculated thea mean of all the pixels of Tb where the condition applies.I have 3 more set of Tbv and RVI .

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Hana
Hana on 23 Oct 2014
Commented: Hana on 13 Nov 2014
I need to calculate mean of all pixel of TBs where condition (RVI>=0 and RVI<=0.2)applies.my images are Tbv2,Tbv3,Tbv4 and RVI2,RVI3,RVI4.Please note that I dont want to calculate mean of each image seperately.the mean should be calculated at once for all images.
Tbv1 = imread('tb.tif');
RVI1 =imread('rvi.tif')
ME = mean(Tbv1( RVI1>=0 & RVI1 <=0.2));

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Accepted Answer

Guillaume
Guillaume on 23 Oct 2014
Concatenate your images in cell arrays, and use cellfun to calculate the mean in one go:
Tbv = {Tbv1, Tbv2, Tbv3, Tbv4};
Rvi = {Rvi1, Rvi2, Rvi3, Rvi4};
me = cellfun(@(tbv, rvi) mean(tbv(rvi>=0 & rvi<=0.2)), Tbv, Rvi);
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Image Analyst
Image Analyst on 31 Oct 2014
Edited: Image Analyst on 31 Oct 2014
If you no longer need the big cell arrays after that, you might clear them to free up memory:
clear('Tbv', 'Rvi');
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Hana
Hana on 13 Nov 2014
me = cellfun(@(tbv, rvi) mean(tbv(rvi>=0 & rvi<=0.2)), Tbv, Rvi); gives me 4 mean value seperately from tha pair (Tbv1,Rvi1)....(Tbv4,Rvi4) I need a single mean value from all the pairs.

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