Edge Postprocessing - A Comparative Study

The use of contextual information is a vital ingredient in the successful postprocessing of edge information. Edge postprocessing is concerned with locating and labelling consistent edge-structures given confused or noisy response information. The available contextual information exists in the form of measurements provided by the gradient-vectors in pixel neighbourhoods and knowledge of acceptable edge structure which is expressed symbolically. We compare various approaches to the use of this information.