OpenCV C++ and cvSmooth

Anyone know what could be problem:

cvSmooth(origImage, grayImage1, CV_BLUR,3);

I received error:

error: cannot co开发者_JAVA技巧nvert `cv::Mat' to `const CvArr*' for argument `1' to `void 
cvSmooth(const CvArr*, CvArr*, int, int, int, double, double)'

If I use:

cvtColor(origImage, grayImage, CV_BGR2GRAY);

All worked fine. capturing is from laptop camera(realtime).

cv::Mat is a new structure from the C++ version of OpenCV. cvSmooth() is from the old C API. Do not mix the C interface with the C++!

I'll suggest that you take a moment to read the introduction.

Also, if you check opencv/modules/imgproc/src/smooth.cpp you'll see that cv::boxFilter() is the equivalent for cvSmooth(CV_BLUR) on the new C++ interface.

Be careful not to mix the OpenCV 1.x API (CvArr) with the 2.x API (cv::Mat). I guess you tried an example from somewhere.