Grayscale image authentication methods based on discrete wavelet transform
碩士 === 靜宜大學 === 資訊管理學系研究所 === 96 === In this thesis, we propose two Grayscale image authentication methods based on discrete Wavelet transform (DWT). In the first method, we make use of property of the low frequency DWT coefficients. The selected coefficients are processed by using the Sobel operato...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
2008
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| Online Access: | http://ndltd.ncl.edu.tw/handle/41324802965818451282 |