Exposing Photo Manipulation with Inconsistent Shadows

被引：77

作者：

Kee, Eric ^{[1
]}

O'Brien, James ^{[2
]}

Farid, Hany ^{[1
]}

机构：

[1] Dartmouth Coll, Dept Comp Sci, Hanover, NH 03755 USA

[2] Univ Calif Berkeley, Berkeley, CA 94720 USA

来源：

ACM TRANSACTIONS ON GRAPHICS | 2013年 / 32卷 / 03期

关键词：

Algorithms; Security; Measurement; Shadows; image forensics; photo manipulation; image manipulation; forgery detection; ILLUMINATION; DIRECTION;

D O I：

10.1145/2487228.2487236

中图分类号：

TP31 [计算机软件];

学科分类号：

081202 ; 0835 ;

摘要：

We describe a geometric technique to detect physically inconsistent arrangements of shadows in an image. This technique combines multiple constraints from cast and attached shadows to constrain the projected location of a point light source. The consistency of the shadows is posed as a linear programming problem. A feasible solution indicates that the collection of shadows is physically plausible, while a failure to find a solution provides evidence of photo tampering.

引用

页数：12