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How to find the angle made by eigen vector and x-axis?

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Suhas Yelluru
Suhas Yelluru am 5 Mai 2014
Kommentiert: John D'Errico am 5 Mai 2014
I have used the function "eig()" to obtain eigen values and eigen vectors of a grayscale image, i now need to find the angle made by the eigen vector with respect to x-axis. Please help!
Thanks in advance!
  2 Kommentare
Geoff Hayes
Geoff Hayes am 5 Mai 2014
Can't the usual method of finding the angle be used? If the vector is [x1 y1], then the angle with respect to the x-axis is atan2(y1,x1)? (Naturally this assumes an origin of (0,0) which may be different than that which is in your problem.)
John D'Errico
John D'Errico am 5 Mai 2014
We don't know how you used eig in this case. For example, did you simply apply eig to a square image as an array? Show what you did, as your question is impossible to answer otherwise.

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