Actually, the project i am trying to do is planar extraction from greyscale images for 3D modeling using C++. For computing the edge, i tried with Sobel Gradient. For line generation, i thought of using hough transformation, are there any libraries available? do u have any other suggestions or alternatives for hough transformatio:)

I am interested in extracting the edges from the gray scale images. Presently i m trying to work with sobel. But if any one can suggest the appropriate filters which i can use for my edge detection algorithm. Is the hough transformation helpful? Please also suggest me some libraries if already exist. Senthil India