Computer Engineering and Applications ›› 2012, Vol. 48 ›› Issue (34): 166-170.

### Composite images detection based on frequency characteristics of JPEG blocking artifacts

ZHANG Zhuoyang, LI Feng, XIONG Bing

1. Department of Computer and Communication Engineering, Changsha University of Science & Technology, Changsha 410114, China
• Online:2012-12-01 Published:2012-11-30

### 基于JPEG块效应频域特性的合成图像检测

1. 长沙理工大学 计算机通信工程学院，长沙 410114

Abstract: The blocking artifacts of JPEG image produced during compression process exhibits as periodic peak of wave in power spectrum. The inconsistency of blocking artifacts induced by tampering JPEG image will weaken or eliminate the peak of wave. Utilizing the above principle, this paper proposes an algorithm to detect composite image based on the frequency characteristics of JPEG blocking artifacts. The noise of the detected image is removed to get noise. The noise is divided into overlapping blocks, and the blocking artifacts metrics of each block is calculated. The forgery regions are detected and located in terms of the metrics. Experimental results show that this algorithm performs better than the traditional algorithm based on the inconsistency of JPEG blocking artifacts in terms of various types of forgery with compositing different image format and tamper with small area.