Question about infer on JPEG images and Quant table about doctamper

[qcf-568]

Hello, the answers are as follows:

1. Read the dct and quant table from the original jpeg file.
2. This V1 version of DTD only can tackle image compressed with quality>=75, which means all values of the quant table should<=64.

Thank you

[PhmHiu]

Thank you very much. I have another small question, can the model work well with scanned documents, or it only works well with image capture from camera

[qcf-568]

This version of DTD mainly works well with image capture from camera, since it relys on block artifact grids to achieve better performance, and the block artifact grids only exist in compressed image. If scaned documents are compressed before tampering (e.g. images in the T-SROIE dataset), this version of DTD can also work well on them.