How to use Mat Objects

[dschaudel]

Hi,

I have to do something like that:

Mat ipl = Mat(720,480,CV_8U);

Mat label = Mat(740,480, CV_32FC1);

IplImage ipl_mat = ipl;   

IplImage label_mat = label;

CvBlobs blobs;

unsigned int result = cvLabel(&ipl_mat, &label_mat, blobs);

This code causes a segmentation fault. 

Is there any possibility to use cvLabel like this -> cvLabel(&ipl_mat, &label_mat, blobs) resp. I want to use a Mat Object as the output image.

I dont want to do this like this:

...

IplImage ipl_mat = ipl;

IplImage* label_mat = cvCreateImage(cvSize(RESOLUTION_W, RESOLUTION_H), IPL_DEPTH_LABEL, 1);

unsigned int result = cvLabel(&ipl_mat, &label_mat, blobs);

[dschaudel]

last line of code

unsigned int result = cvLabel(&ipl_mat, &label_mat, blobs);

last line of code

unsigned int result = cvLabel(&ipl_mat, label_mat, blobs);

[Farzad Husain]

Hi

I am also doing exactly the same thing. I tried both ways
IplImage* ipl_labelImg = cvCreateImage(cvSize(480, 640), IPL_DEPTH_LABEL, 1);
and
IplImage ipl_labelImg = cv::Mat(480,640,CV_32FC1);

but I am getting a segmentation fault at:
unsigned int result = cvLabel(&ipl_segment_dil, ipl_labelImg, blobs);

Please let me know if you have found a solution