Problem with opencv function

[Err]

Hello,

I'm trying to use opencv library in my application, and meet the troubles. In the attached file 3 functions with following prototypes:

void cvSetErrStatus(long status);

CvMat* cvCreateMat( int rows, int cols, int type );
void cvFindHomography( const CvMat* src_points, const CvMat* dst_points, CvMat* homography );

As long as LV can't pass structures as out parameter of CLFN (CvMat is a structure), I use pointer to numeric value for structure passing from one function to another. The first two functions work properly, but the last one returns error. Any suggestions?

[Yi Y]

Hi Err,
It seems like you are trying to pass the wrong type of parameter to cvFindHomography( const CvMat* src_points, const CvMat* dst_points, CvMat* homography ).  How did you configure the Call Library Function Node that calls cvFindHomography( const CvMat* src_points, const CvMat* dst_points, CvMat* homography )? Maybe you should try using I32 instead of I64 for the pointers. Hope this helps.

Yi Y.
Applications Engineer
National Instruments
http://www.ni.com/support