Upscaling factor estimation on pre-JPEG compressed images based on difference histogram of spectral peaks

作者：

Highlights：

• The relationship among resampling factor and shifted JPEG peaks is given.

• The relative position of spectral peaks is used for resampling factor estimation.

• A differential histogram of peaks is constructed for searching candidate factors.

摘要

•The relationship among resampling factor and shifted JPEG peaks is given.•The relative position of spectral peaks is used for resampling factor estimation.•A differential histogram of peaks is constructed for searching candidate factors.

论文关键词：Image forensics,Image resampling detection,Upscaling factor estimation,JPEG blocking artifacts

论文评审过程：Received 22 June 2020, Revised 14 January 2021, Accepted 4 March 2021, Available online 13 March 2021, Version of Record 15 March 2021.

论文官网地址：https://doi.org/10.1016/j.image.2021.116223