| Summary: | 碩士 === 國立交通大學 === 資訊科學學系 === 83 === In this paper, we propose an image enhancement system that
emphasizes edges and local details. First, we use the Sobel
operator to get the rough distribution of the edges of the
input image. Two thresholds, called the high-threshold and low-
threshold, are used in the Sobel operator to obtain two images.
These two images are then processed using a 7x7 filter to
remove the noises around the edges, followed by some
morphological operations and a thinning process. Two different
edge images are then obtained. Through some processing, we can
combine the two edge images to get a better edge image. The
edge image and a coloring skill based on clustering can then
generate a rough region graph. Some local histogram
equalization methods are then applied to the detected regions.
The obtained image and the edge image are then combined to get
the final output. Experimental results are included to prove
the feasibility.
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