数字视频取证国外博士学位论文

We present new forensic tools that are capable of detecting traces of tampering in digital video without the use of watermarks or specialized hardware. These tools operate under the assumption that video contain naturally occurring properties which are disturbed by tampering, and which can be quantied, measured, and used to expose video fakes. In this context, we oer ve new forensic tools (1) Interlaced, (2) De-interlaced, (3) Double Compression, (4) Duplication, and (5) Re-projection, where each technique targets a specic s tatistical or geometric artifact. Combined, these tools provide a valuable rst set of forensic tools for authenticating digital video. ii tatistical or geometric artifact. Combined, these tools provide a valuable rst set of forensic tools for authenticating digital video. ii