| Digital watermarking is one of technology of infoemation hiding, it is valued in 90's in 20 centuries and develop rapidly. Now, the digital watermark technology is extensively applied in the intelligent property right protection, anti-fake ticket in business trade, the voice and image data to conceal marking and distort, concealment communication and countermeasure etc. aspect. This thesis uses the peculiar property of digital watermarking in anti-fake printing, developed a detection of digital watermark system based on DSP.Firstly, this thesis introduced the background of our project, the development of digital watermarking and the application of digital watermarking.Secondly, this thesis described the design and implementation of the whole system. A TI TMS320VC5509A is selected as the heart of this system, acquired image data from a CMOS sensor, logical control implemented in a CPLD and stored data with a SRAM.Thirdly, this thesis discussed some tips about hardware design, especially about power design and debugging.And then, the algorithm of digital watermarking of this system was introduced.Lastly, this thesis summarized the content discussed above, and designed a detection of digital watermark system based on DSP and then made some suggestion to the next board. |
