High Capacity Reversible Data Hiding On Ordered Dithered Halftone Images
碩士 === 輔仁大學 === 資訊工程學系 === 100 === In this paper, in terms of lossless data compress and pixel paring, we propose a high capacity reversible data hiding method of ordered dithered halftone image. Ordered dithering method can simply convert a gray scale image into a halftone image by com-paring pix...
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ndltd-TW-100FJU003920172016-02-21T04:19:33Z http://ndltd.ncl.edu.tw/handle/24221237995321032555 High Capacity Reversible Data Hiding On Ordered Dithered Halftone Images 針對有序打散影像之高容量可逆資訊隱藏方法 Lee, KunYing 李昆穎 碩士 輔仁大學 資訊工程學系 100 In this paper, in terms of lossless data compress and pixel paring, we propose a high capacity reversible data hiding method of ordered dithered halftone image. Ordered dithering method can simply convert a gray scale image into a halftone image by com-paring pixel values with dither matrix values. Moreover, we divide a halftone image into three types of pixel-pairs through pixel pairing method. We use two types of pixel-pairs as our objects of lossless compression and main sources of capacity. We use the Golomb code to losslessly compress these two types of pixel-pairs information, then embed the result into image to achieve reversibly. Compared to other reversible watermarking methods, our new method provides a higher embedding capacity and still maintains a better visual quality of watermarked image. The experiment result show that our methods do have a higher embedding ca-pacity and better visual quality. Lien, KuoJen 連國珍 2012 學位論文 ; thesis 65 zh-TW |
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碩士 === 輔仁大學 === 資訊工程學系 === 100 === In this paper, in terms of lossless data compress and pixel paring, we propose a high capacity reversible data hiding method of ordered dithered halftone image. Ordered dithering method can simply convert a gray scale image into a halftone image by com-paring pixel values with dither matrix values. Moreover, we divide a halftone image into three types of pixel-pairs through pixel pairing method. We use two types of pixel-pairs as our objects of lossless compression and main sources of capacity. We use the Golomb code to losslessly compress these two types of pixel-pairs information, then embed the result into image to achieve reversibly.
Compared to other reversible watermarking methods, our new method provides a higher embedding capacity and still maintains a better visual quality of watermarked image. The experiment result show that our methods do have a higher embedding ca-pacity and better visual quality.
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Lien, KuoJen |
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Lien, KuoJen Lee, KunYing 李昆穎 |
author |
Lee, KunYing 李昆穎 |
spellingShingle |
Lee, KunYing 李昆穎 High Capacity Reversible Data Hiding On Ordered Dithered Halftone Images |
author_sort |
Lee, KunYing |
title |
High Capacity Reversible Data Hiding On Ordered Dithered Halftone Images |
title_short |
High Capacity Reversible Data Hiding On Ordered Dithered Halftone Images |
title_full |
High Capacity Reversible Data Hiding On Ordered Dithered Halftone Images |
title_fullStr |
High Capacity Reversible Data Hiding On Ordered Dithered Halftone Images |
title_full_unstemmed |
High Capacity Reversible Data Hiding On Ordered Dithered Halftone Images |
title_sort |
high capacity reversible data hiding on ordered dithered halftone images |
publishDate |
2012 |
url |
http://ndltd.ncl.edu.tw/handle/24221237995321032555 |
work_keys_str_mv |
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