Sanford, Jerald Patrick2020-12-142020-12-141985http://hdl.handle.net/10919/101259The design of an efficient, low-cost system for automatically converting a hardcopy technical drawing into a highly compressed electronic representation is the motivation for this work. An improved method for extracting line and region information from a typical engineering drawing is presented. An efficient encoding method has also been proposed that takes advantage of the preprocessing done by the region and line extraction steps. Finally, a technique for creating a highly compressed mathematical representation (based on spline approximations) for the drawing is presented.viii, 89 leavesapplication/pdfenIn CopyrightLD5655.V855 1985.S263Engineering drawings -- Data processingImage processing -- Digital techniquesPattern recognition systemsSpline theoryThesis