Dealing with sequences in OpenCV?

Question

I have 2 sequences. One (lets call this cvSeq x), which contains a number of contours (derived from cvFindContours) and a second (lets call this cvSeq y) which I have used cvCreateSeq upon, but doesn't actually have anything in it. I am looping through all the contours in x, and if a contour meets specific criteria, I add it to y. I am able to do the looping, but I don't know how to add an contour in x to y if it meets the criteria.

Does anyone know how to add a contour in a sequence to another sequence (that is empty)? Code examples will be appreciated.

PS: cvStartFindContours is not an option.

Answer 1

A solution would be to use the C++ interface, instead of the old one. It is much simpler to use. Contours are stored as vector<vector<Point>>

You can use it in a similar way:

Mat myImg = (Mat)myIplImage;
//or better
Mat myImg = imread("image.jpg");

vector<vector<Point>> contours;

cv::findContours(myImg, contours,...);

Now access to contours and points is much simpler and easier

Note I did not checked the code accuracy. You must verify the correct way to send params to findContours, and all the rest.