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Hi,

I need to apply a function to each element of a matrix (in a Mat object). For example, I need to calculate the hyperbolic tangent (tanh) of each value in the Mat.

I know that I can access each element of a Mat M by M.at<T>(i,j) as such I can implement the algorithm (just pseudocode) as follows:

for( i = ... )//through each row in Mat M
    for(j = ...)//through each column
        M.at<T>(i,j) = tanh( M.at<T>(i,j) );

This works. But it is rather slow as I'm working on a real time system that needs to do the same operation over and over.

Is there is perhaps someway to collectively apply the same function (perhaps by passing a function pointer) to each element in a Mat at the same time? That would be quite helpful.

Thanks in advance :)

Hi,

I need to apply a function to each element of a matrix (in a Mat object). For example, I need to calculate the hyperbolic tangent (tanh) of each value in the Mat.

I know that I can access each element of a Mat M by M.at<T>(i,j) as such I can implement the algorithm (just pseudocode) as follows:

for( i = ... )//through each row in Mat M
    for(j = ...)//through each column
        M.at<T>(i,j) = tanh( M.at<T>(i,j) );

This works. But it is rather slow as I'm working on a real time system that needs to do the same operation over and over.

Is there is perhaps someway to collectively apply the same function (perhaps by passing a function pointer) to each element in a Mat at the same time? That would be quite helpful.

Thanks in advance :)