Journal of Applied Sciences ›› 2022, Vol. 40 ›› Issue (5): 820-827.doi: 10.3969/j.issn.0255-8297.2022.05.011

• Signal and Information Processing • Previous Articles     Next Articles

Image Rotation Angle Estimation on JPEG Compressed Images via Third-order Differential Prefiltering Operation and Cyclostationarity Analysis

SONG Zhonghao, YAO Heng   

  1. School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
  • Received:2021-06-09 Online:2022-09-30 Published:2022-09-30

Abstract: In this paper, we propose to estimate the rotation angle of JPEG compressed image based on prefilter and cyclic spectral analysis in order to improve detection performance. We first mathematically show the cyclostationarity of differentially filtered images. And then we design a prefilter to reduce the effect of JPEG block artifacts on the image spectrum, further improving the detection ability. At last, the rotation angle is estimated based on the locations of characteristic peaks. Experimental results demonstrate that the proposed detection method outperforms some state-of-the-art methods.

Key words: digital image forensics, resampling detection, rotation angle estimation, cyclostationarity

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