New morphological algorithm for automated interpolation of height grids from contour images
Sidney M. Petersen, William A. Barrett, Robert P. Burton · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1990
A new morphological algorithm for automated interpolation of height grids from contour images is developed. Explicit identification of contours within the image is not necessary since interpolation is done directly in image space using morphologic iransforms and labeling schemes. 3-D depth-shaded perspective images of height grids for specified viewing angles are generated using transformed height columns. These methods avoid the processing associated with intermediate contour and polygonal representations. Co-registered continuous tone (gray scale) image data is mapped onto the 3-D views. Advantages of this new recursive algorithm include the ability to interpolate and label whole families of points simultaneously and the basing of interpolated values on surrounding contour morphology. In addition, the methodology for decomposition and labeling of contour intervals is directly amenable to parallel implementation.