Perceptual invisibility - PowerPoint PPT Presentation

Multimedia Security

DCT-Domain Watermarking Chiou-Ting Hsu and Ja-Ling Wu, &quot;Hidden digital watermarks in images,&quot; IEEE Trans. On Image Processing, vol. 8, No. 1, January 1999. Multimedia Security. Requirements Invisibility Robustness No ambiguity. Embedding. Comparison. Extraction.

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Calm Computing

“Machines that fit the human environment, instead of forcing humans to enter theirs, will make using a computer as refreshing as taking a walk in the woods.” -- Mark Weiser The Computer for the 21st Century. Calm Computing. Hari Khalsa September 20, 2004. The Coming Age of Calm Technology.

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256 views • 7 slides

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