Cost-based closed-contour representations

bstract. This paper presents an efficient technique for linking dge points in order to generate a closed-contour representation. It s based on the consecutive use of global and local schemes. In oth cases it is assumed that the original intensity image, as well as ts corresponding edge map, are given as inputs to the algorithm. he global scheme computes an initial representation by connecting dge points minimizing a global measure based on spatial informaion (3D space). It relies on the use of graph theory and exploits the dge points’ distribution through the given edge map, as well as heir corresponding intensity values. At the same time spurious edge oints are removed by a morphological filter. The local scheme fially generates closed contours, linking open boundaries, by using local cost function that takes into account both spatial and topoogical information. Experimental results with different images, toether with comparisons with a previous technique, are resented. © 2007 SPIE and IS&T. DOI: 10.1117/1.2731799