This paper proposes a forgery detection method using the characteristics of longitudinal chromatic aberration. For image objects located in similar depth, we extract sharpness features in each color channel based on local phase coherence. Strength and the direction of longitudinal chromatic aberration are estimated from the sharpness difference among different channels. Characteristics of longitudinal chromatic aberration for multiple targets is analyzed, and the inconsistency is exploited to identify image forgery. Experimental results show that the method is effective for composite images.
CHEN Zhu-yi, FANG Zhen
. Detection of Digital Image Forgery Based on Chromatic Aberration[J]. Journal of Applied Sciences, 2015
, 33(6)
: 604
-614
.
DOI: 10.3969/j.issn.0255-8297.2015.06.004
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