Title :
How realistic is photorealistic?
Author :
Lyu, S. ; Farid, H.
Author_Institution :
Comput. Sci. Dept., Dartmouth Coll., Hanover, NH, USA
Abstract :
Computer graphics rendering software is capable of generating highly photorealistic images that can be impossible to differentiate from photographic images. As a result, the unique stature of photographs as a definitive recording of events is being diminished (the ease with which digital images can be manipulated is, of course, also contributing to this demise). To this end, we describe a method for differentiating between photorealistic and photographic images. Specifically, we show that a statistical model based on first-order and higher order wavelet statistics reveals subtle but significant differences between photorealistic and photographic images.
Keywords :
photography; rendering (computer graphics); statistical analysis; wavelet transforms; computer graphics rendering software; first-order wavelet statistic; higher order wavelet statistic; photographic image; photorealistic image; statistical model; Computer graphics; Digital images; Digital recording; Forensics; Higher order statistics; Image coding; Image generation; Rendering (computer graphics); Speech; Terrorism; Digital forensics; image statistics; photorealism;
Journal_Title :
Signal Processing, IEEE Transactions on
DOI :
10.1109/TSP.2004.839896
