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$\begingroup$ Thanks for the answer sir! ... I have a question please, how should the mean images computed over the dataset? shall I compute a single mean over (testing+training data) or shall I compute two different means one for training and the other for testing ? $\endgroup$

Ibrahim Amer
– Ibrahim Amer

2016-09-11 13:36:24 +00:00
Commented Sep 11, 2016 at 13:36
$\begingroup$ Just a note, the mean you should remove from the test set should be the mean of the training data I believe right? To make the same transformation. Otherwise if sets are too different, means would be also different, and therefore the transformation applied to the test set, also different. Could anyone back me up? @amoeba? $\endgroup$

ouranos
– ouranos

2017-07-02 21:06:09 +00:00
Commented Jul 2, 2017 at 21:06
1

$\begingroup$ @ouranos That's right -- you subtract the mean of the training data from the test data. That's what I meant by "both transformations should be done using the values obtained with the training set." $\endgroup$

amoeba
– amoeba

2017-07-02 21:16:36 +00:00
Commented Jul 2, 2017 at 21:16

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