What does the function CvPoint2D32f in OpenCV

Question

CvPoint2D32f

I want to know what this function does, for example:

CvPoint2D32f center = cvPoint2D32f(src->width/2,src->height/2);

Answer 1

OpenCV has a few different data structures for points (that is, x:y or x:y:z coordinates) and their name tells you what type of point it is.

This particular point is a 2D Point - so it has just X and Y coordinates, and they are 32-bit floating point values. That's what the 32f at the end means. A 3D point that uses 32-bit floating point values would have 3D32f at the end of the data type name.

See this page in the OpenCV reference documentation for more info.

Answer 2

The code you posted sets the coordinates of a 2D point type as the center coordinates of some src data structure (eg cv::Mat or CvMat).