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how to write this equation in Matlab?? please help

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ghada sandoub
ghada sandoub 2019-2-11
编辑： ghada sandoub 2019-8-14
where Ig(x) is an image (matrix

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Bob Thompson
Bob Thompson 2019-2-11
sigma = (I/eta).*sum(sqrt(ln((Imax(range)+Imin(range))./(Imax(range)-Imin(range))));
Something like this. Your 'range' is going to be the different values of x you want. Most everything else should just be filling in variables.
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Bob Thompson
Bob Thompson 2019-2-12
编辑：Bob Thompson 2019-2-12
You can apply the summation across multiple x values by defining your 'range' to cover those values. sum() just adds up all the values of the interior array.
You can define a range in matlab using index notation.
ghada sandoub
ghada sandoub 2019-2-12
编辑：ghada sandoub 2019-2-12
@ Bob Nbob
i applied this form for the equation
sigma = (I/eta).*sum((log(( double(Imax) + double(Imin )) ./ ( double(Imax) - double(Imin ))) ).^ -0.5) ;
where : Imax and Imin are matrices with arguments of type uint8 , but i met this error in matlab
and when i used * instead of .* i met this error
can you help me to fix this error

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