IplImage to Mat

To convert an IPLImage to a Mat object in OpenCV, you can use the following code:

IplImage* ipl_img; // your IplImage object
Mat mat_img = cvarrToMat(ipl_img);

This code uses the cvarrToMat() function to convert the IplImage to a Mat object. Afterwards, you can use the Mat object for further processing or display.

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C++ IplImage to Mat

To convert an IplImage to a Mat in OpenCV, you can use the following code:

// Assume we have an IplImage called iplImage
Mat matImage(iplImage);

This will create a new Mat object called `matImage` that shares the same image data as the IplImage. Note that this only works if the IplImage was created with the `IPL_DEPTH_8U` depth and a 3-channel color format (such as `IPL_DEPTH_8U` and `IPL_DEPTH_8S`). If your IplImage has a different depth or format, you will need to manually copy the image data to a new Mat object.

C++ Mat to IplImage

To convert a Mat object to an IplImage object in OpenCV, you can use the following code:

Mat matImage;
IplImage* iplImage = cvCreateImage(cvSize(matImage.cols, matImage.rows), IPL_DEPTH_8U, matImage.channels());
iplImage->widthStep = matImage.step;
memcpy(iplImage->imageData, matImage.data, matImage.step * matImage.rows);

First, create a Mat object named `matImage` that you want to convert to an IplImage object. Then, create an empty IplImage object using the `cvCreateImage()` function and passing in the width, height, and number of channels of the Mat object. Set the `widthStep` of the IplImage object to the `step` of the Mat object. Finally, use the `memcpy()` function to copy the data from the Mat object to the IplImage object.

Note that the `cvCreateImage()` function creates an IplImage object with the same number of channels as the Mat object. If you want to convert a Mat object with 3 channels to an IplImage object with 1 channel, for example, you need to create a new IplImage object with only 1 channel and then copy the data from the Mat object to the new IplImage object.