Bilateral filtering and adaptive tone-mapping for qualified edge and image enhancement
| Autor: | Jih-Fon Huang, Kuo-Jui Hu, Ting-Ting Chang, Min-Yao Lu, Wu-Jeng Li |
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| Rok vydání: | 2009 |
| Předmět: |
Lightness
Computer science business.industry Color image Image quality ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Image processing Filter (signal processing) Tone mapping Gamma correction Histogram Computer vision Artificial intelligence Bilateral filter business Image resolution Image restoration |
| Zdroj: | Color Imaging: Displaying, Processing, Hardcopy, and Applications |
| ISSN: | 0277-786X |
| Popis: | Most of high-contrast images are common with dark and bright area. It is difficult to present the detail on both dark and high light areas on display devices. In order to resolve this problem, we proposed a method of image enhancement to improve this image quality and used bilateral filter to keep the detail. In paper, we applied an appropriate algorithm to process images. At first, we use bilateral filter to separate image. One is large scale image and the other is detail image. Second, we made large scale image which was translated into histogram. In order to make the images divided into three stairs, such as lightness, middle-tone and darkness region. We decided two optimal threshold parameters. Finally, according to three images we use different tone-mapping method to process each stair. The tone-mapping method includes adaptive s-curve and gamma curve algorithms. The experiment results of this study revealed image detail and enhancement. To avoid contour phenomenon is in lightness region. |
| Databáze: | OpenAIRE |
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