In this paper, we describe a simple method for digitally replacing an individual’s face in a single photograph with that of another person. Our work focuses on the illumination aspect of face replacement, whereby the lighting conditions across a human face in an arbitrary image are extracted and then applied to a target replacement face. We also describe a method to seamlessly merge this newly ...

We describe two homomorphic signature schemes for digital photographs such that an intermediate party in possession of a signed photograph can construct a scaled, cropped, and lossily compressed version of the photograph along with a new, valid signature, without knowing the private signing key. In other words, our signature schemes are simultaneously homomorphic with respect to cropping, scali...

Photographs help people illustrate the stories of their lives and the significant stories of their society. However, photographs can do more than illustrate events; in this article, we show that photographs can distort memory for them. We describe the course of our ‘‘falsememory implantation’’ research, and review recent work showing that photographs can sometimes increase—while other times dec...

Size reduction of high energy materials such as 1, 3, 5, 7-tetranitro- 1, 3, 5, 7-tetraaza cyclooctane (HMX) has considerable influences on improving their explosive characteristics. In this study, nanosized HMX par‌ticles were produced using ultrasonically reprecipitation method by applying water as a safe and accessible antisolvent instead of unsafe conventional methods. SEM photographs revea...