Table 1 Requirements of the crop-and-paste tampering detection methods
From: Detection of shifted double JPEG compression by an adaptive DCT coefficient model
| Â | Aligned double JPEG detection approach | Shifted double JPEG detection approach |
|---|---|---|
Original image | JPEG compressed | JPEG compressed or raw |
Foreign image being inserted | JPEG compressed or raw | JPEG compressed |
Final image | JPEG compressed | JPEG compressed |
Decision basis | Presence of ADJPEG effect indicates un-tampered patch | Presence of SDJPEG effect indicates tampered patch |
Additional limitation | The quantization matrices of original and final image cannot be the same | The block structure of the inserted patch cannot align to that of the final image |