recapturing goodquality images from the highfidelity artificial scenery
such as LCD screen or printed papers
becomes possible. This kind of highquality recaptured images may be used for illegal purpose
and they can also pass current identification systems without being recognized. It is studied how to detect recaptured photographs on LCD screen. By analyzing the noise in the photographs and detecting whether it exists double JPEG compression in the photography
the proposed features work well with a support vector machine classifier.