The design of double encrypted binary printed image by using tilted halftone dots
碩士 === 國立臺灣師範大學 === 圖文傳播學系 === 95 === The main purpose of this research is to design the double encrypted binary image by tilted halftone dots. The modified digital halftoning technique is applied to covert the continue image into binary image with titled halftone dots. Both the figurative watermark...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2007
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| Online Access: | http://ndltd.ncl.edu.tw/handle/38306743381197281832 |
| Summary: | 碩士 === 國立臺灣師範大學 === 圖文傳播學系 === 95 === The main purpose of this research is to design the double encrypted binary image by tilted halftone dots. The modified digital halftoning technique is applied to covert the continue image into binary image with titled halftone dots. Both the figurative watermark pattern and the hidden data according to the pseudo-random number are encoded in the binary image printed. The hidden image and data can detected the by human eyes, optical decoder and digital image processing. The double encrypted binary image not only has the bar code capability but also displays meaningful image.
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