Opencv3.0中Mat与IplImage的转换

最近做图像,使用了Opencv3.0。因为涉及了蛋疼的混合编程，所以Mat 和 IplImage的转换是必不可少的。

让人无语的是从网上查的IplImage转Mat的方法根本不能用。于是我不得不扒了一下Opencv3.0的原文档，上面这么说：

Partial yet very common cases of this user-allocated data case are conversions from CvMat and IplImage to Mat. For this purpose, there is functioncv::cvarrToMat taking pointers to CvMat or IplImage and the optional flag indicating whether to copy the data or not.

 Ptr<IplImage> iplimg(cvLoadImage(imagename)); // Ptr<T> is safe ref-counting pointer class    if(!iplimg)    {        fprintf(stderr, "Can not load image %s\n", imagename);        return -1;    }    Mat img = cv::cvarrToMat(iplimg); // cv::Mat replaces the CvMat and IplImage, but it's easy to convert    // between the old and the new data structures (by default, only the header    // is converted, while the data is shared)

以上是IplImage转换为Mat的过程，而IplImage转换Mat是有一个现成的构造函数：

IplImage(Mat& m);

所以，答案如下：

(1) IplImage 转 Mat:

IplImage* image = cvLoadImage( "lena.jpg");  Mat mat=cvarrToMat(image);

(2)Mat转IplImage:

IplImage img = IplImage(mat);