a hybrid illumination refinement technique with copyright protection
碩士 === 逢甲大學 === 資訊工程學系 === 103 === Image archive is a transformation from source to its digital form. This process, however, often leads to the irregular distribution of image illumination, which distorting the content of images. In this article, we propose a hybrid illumination technique based on d...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Others |
| Language: | en_US |
| Published: |
2015
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| Online Access: | http://ndltd.ncl.edu.tw/handle/92255354479667484138 |
| Summary: | 碩士 === 逢甲大學 === 資訊工程學系 === 103 === Image archive is a transformation from source to its digital form. This process, however, often leads to the irregular distribution of image illumination, which distorting the content of images. In this article, we propose a hybrid illumination technique based on double Niblack thresholds to refine the brightness of under-exposure and over-exposure images, including the text image and the text-photo image. In particular, we introduce the watermarking concept to the transformation so that the improver can demonstrate the copyright of this refinement in the future. Experimental results have shown that the new method can effectively adjust the illumination to improve the quality of digital images without the influence of the appended watermark.
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