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Estimating Degradation Model Parameters From Character Images, Hok S. Yam, Elisa H. Barney Smith
Estimating Degradation Model Parameters From Character Images, Hok S. Yam, Elisa H. Barney Smith
Electrical and Computer Engineering Faculty Publications and Presentations
This paper discusses the use of character images to determine the parameters of an image degradation model. The acute angles in character images provide information used to find the model parameters. Three experiments are conducted to evaluate the use of characters. In the first experiment, large quantities of corners from character images are used to investigate how their contribution affects the mean and the standard deviation of the parameter estimators. In the second experiment, we focus on the relationship between the angles of the corners used in estimation and the estimation results. In the last experiment, we examine how likely …
Speedup Of Optical Scanner Characterization Subsystem, Roger D. Clements, Elisa H. Barney Smith
Speedup Of Optical Scanner Characterization Subsystem, Roger D. Clements, Elisa H. Barney Smith
Electrical and Computer Engineering Faculty Publications and Presentations
Small image deformations such as those introduced by optical scanners significantly reduce the accuracy rate of optical character recognition (OCR) software. Characterization of the scanner used in the OCR process may diminish the impact on recognition rates. Theoretical methods have been developed to characterize a scanner based on the bi-level image resulting from scanning a high contrast document. Two bottlenecks in the naïve implementation of these algorithms have been identified, and techniques were developed to improve the execution time of the software. The algorithms are described and analyzed. Since approximations are used in one of the techniques, the error of …