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Full-Text Articles in Engineering
Relating Statistical Image Differences And Degradation Features, Elisa Barney Smith, Xiaohui Qiu
Relating Statistical Image Differences And Degradation Features, Elisa Barney Smith, Xiaohui Qiu
Electrical and Computer Engineering Faculty Publications and Presentations
Document images are degraded through bilevel processes such as scanning, printing, and photocopying. The resulting image degradations can be categorized based either on observable degradation features or on degradation model parameters. The degradation features can be related mathematically to model parameters. In this paper we statistically compare pairs of populations of degraded character images created with different model parameters. The changes in the probability that the characters are from different populations when the model parameters vary correlate with the relationship between observable degradation features and the model parameters. The paper also shows which features have the largest impact on the …
Method For Cleaning Phosphor Screens For Use With Field Emission Displays - Micron Technology Inc. (Boise, Id) - United States Patent 6409564, Jim Browning, Zhongyi Xia, David A. Cathey, Surjit S. Chadha
Method For Cleaning Phosphor Screens For Use With Field Emission Displays - Micron Technology Inc. (Boise, Id) - United States Patent 6409564, Jim Browning, Zhongyi Xia, David A. Cathey, Surjit S. Chadha
Jim Browning
A method for cleansing the phosphor screen of a display device comprising the removal of oxygen or sulfur from the surface of the phosphor, and/or its associated binder material, to a depth that prevents oxygen diffusion from the phosphor and/or binder, thereby creating an oxygen deficient surface on the phosphors.
Uniqueness Of Bilevel Image Degradations, Elisa H. Barney Smith
Uniqueness Of Bilevel Image Degradations, Elisa H. Barney Smith
Electrical and Computer Engineering Faculty Publications and Presentations
Two major degradations, edge displacement and corner erosion, change the appearance of bilevel images. The displacement of an edge determines stroke width, and the erosion ofa corner affects crispness. These degradations are functions of the system parameters: the point spread function (PSF) width and functional form, and the binarization threshold. Changing each of these parameters will affect an image differently. A given amount of edge displacement or amount of erosion of black or white corners can be caused by several combinations of the PSF width and the binarization threshold. Any pair of these degradations are unique to a single PSF …