Digital WatermarkingElsevier, 2001. gada 17. okt. - 542 lappuses Digital watermarking is a key ingredient to copyright protection. It provides a solution to illegal copying of digital material and has many other useful applications such as broadcast monitoring and the recording of electronic transactions. Now, for the first time, there is a book that focuses exclusively on this exciting technology. Digital Watermarking covers the crucial research findings in the field: it explains the principles underlying digital watermarking technologies, describes the requirements that have given rise to them, and discusses the diverse ends to which these technologies are being applied. As a result, additional groundwork is laid for future developments in this field, helping the reader understand and anticipate new approaches and applications. |
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1.–5. rezultāts no 79.
... frequency coefficients in each block to either an even or odd multiple of a quantization step size. Each quantized coefficient encodes either a 0, if it is quantized to an even multiple, or a 1, if quantized to an odd multiple. The ...
... frequency E . . – . DCTQ/D . . . . . . – . DCTQ . . . terms . . system . . . . of . . the . to . . provide . block . . . . . DCT. . 341 deHere, the embedded bit pattern is a semi-fragile signature derived from the lowfrequency terms of ...
... frequency (800 Hz, for example) [222]. This time code was embedded at periodic intervals, say every 15 minutes. The code was inaudibly hidden in the broadcast, but it was not a watermark because the message (the current time) was ...
... frequency indicated that the notch filter had been applied and the duration of the absence used to code either a dot or a dash. The identification signal used Morse code. The 1961 U.S. Patent describing this invention states [112]: The ...
... frequency spectrum. Such a tone constitutes a simple watermark. In 1989, Broughton and Laumeister were awarded a patent [31] for a technique that allows action toys to interact with television programs. In this technique, a simple video ...
Saturs
1 | |
11 | |
Chapter 3 Models of Watermarking | 41 |
Chapter 4 Basic Message Coding | 85 |
Chapter 5 Watermarking with Side Information | 117 |
Chapter 6 Analyzing Errors | 157 |
Chapter 7 Using Perceptual Models | 201 |
Chapter 8 Robust Watermarking | 241 |
Appendix A Background Concepts | 359 |
Appendix B Selected Theoretical Results | 373 |
Appendix C Source Code | 395 |
Appendix D Notation and Common Variables | 483 |
Glossary | 487 |
501 | |
521 | |
About the Authors | 541 |
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Digital Watermarking: Third International Workshop, IWDW 2004, Seoul, Korea ... Ingemar J. Cox Ierobežota priekšskatīšana - 2005 |
Digital Watermarking: Third International Workshop, IWDW 2004, Seoul, Korea ... Ingemar J. Cox,Ton Kalker,Heung-Kyu Lee Ierobežota priekšskatīšana - 2005 |
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Atsauces uz šo grāmatu
Multimedia Encryption and Watermarking Borko Furht,Edin Muharemagic,Daniel Socek Priekšskatījums nav pieejams - 2005 |