Edge Enhancement and Its Applications
نویسندگان
چکیده
We describe an automated edge enhancement procedure that operates in conjunction with clustereddot dithering, edge weighted unsharp masking, compound anisotropic diffusion etc. The goal is to make weak edges more noticeable and to give the strong edges in the half toned image a sharper and more natural appearance. Unsharp masking that is widely used for image enhancement amplifies image contrast by adding the high frequency component that is obtained by a linear high pass filter from an input image. To preserve image features, the anisotropic diffusion is governed by a local co-ordinate transformation. Experimental results show that edge enhancement is successful in improving the appearance of the text, line art and natural scenes. Also real ultrasonic images indicate effective preservation of edges and local details. Edge enhancement enhances edges in image with natural transition and sharp visual quality.
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