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hi,

i tried out the following tutorial.I used opencv 2.4.2 with visual studio 2010 and c++.(http://docs.opencv.org/doc/tutorials/imgproc/shapedescriptors/moments/moments.html)

there i can calculate moments for each and every contour of the image, like this

vector<moments> mu(contours.size() ); for( int i = 0; i < contours.size(); i++ ) { mu[i] = moments( contours[i], false ); }

then i tried to calculate Hu-Moments in the same way. i tried with various combinations, but didn't got it work. My problems are,

1. is it possible to calculate Hu-Moments only for a one contour ?
2. should i calculate Hu-Moments for the whole image?

please can anyone explain this with some examples?

hi,

i tried out the following tutorial.I used opencv 2.4.2 with visual studio 2010 and c++.(http://docs.opencv.org/doc/tutorials/imgproc/shapedescriptors/moments/moments.html)

there i can calculate moments for each and every contour of the image, like this

vector<Moments> mu(contours.size() );
 for( int i = 0; i < contours.size(); i++ )
 {
    mu[i] = moments( contours[i], false );
     }
}

hi,

i tried out the following tutorial.I used opencv 2.4.2 with visual studio 2010 and c++.(http://docs.opencv.org/doc/tutorials/imgproc/shapedescriptors/moments/moments.html)

there i can calculate moments for each and every contour of the image, like this

vector<Moments> mu(contours.size() );
for( int i = 0; i < contours.size(); i++ )
{
   mu[i] = moments( contours[i], false );
}

then i tried to calculate Hu-Moments in the same way. i tried with various combinations, but didn't got it work. My problems are,

1. is it possible to calculate Hu-Moments only for a one contour ?
2. should i calculate Hu-Moments for the whole image?

please can anyone explain this with some examples?

hi,

i tried out the following tutorial.I used opencv 2.4.2 with visual studio 2010 and c++.(http://docs.opencv.org/doc/tutorials/imgproc/shapedescriptors/moments/moments.html)

there i can calculate moments for each and every contour of the image, like this

vector<Moments> mu(contours.size() );
for( int i = 0; i < contours.size(); i++ )
{
   mu[i] = moments( contours[i], false );
}

then i tried to calculate Hu-Moments in the same way. i tried with various combinations, but didn't got it work. My problems are,

1. is it possible to calculate Hu-Moments only for a one contour ?
2. should i calculate Hu-Moments for the whole image?

please can anyone explain this with some examples?