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Title |
Contrast Enhancement Technique of Dark Blurred Image |
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Author |
Naglaa Yehya Hassan, Norio Aakamatsu |
| Citation |
Vol. 6 No. 2 pp. 223~226 |
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Abstract |
Our chief goal in this paper is to produce a contrast enhancement technique to recover an image within a given area, from a blurred and darkness specimen, also improve visual quality of it. Our technique consists of two steps unsharp masking step and contrast enhancement step. We applied unsharp masking step to the image to sharpen edges and bring out hidden details. In contrast enhancement step 3x3 slider map window was applied to the image to determine if the corresponding pixel will be remapped or not. The new value of remapped pixel based on a sigmoid map function. We provide experimental results from the application of our technique to real images, which are hard to be contrasted by other conventional techniques. Good and satisfying results were obtained. |
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Keywords |
Digital image, sigmoid function, contrast enhancement, image processing and un-sharp masking. |
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