Patent ID: 8294784

Claim:
A method for removing flickering from a video of an object illuminated by a screen that operates on a refresh rate value (f scr ) among a first value set including screen compatible refresh rate values, and an ambient lighting that operates on a certain line frequency value (f l ) captured by a camera with a certain exposure time value (t e ) among a second value set including camera compatible exposure time values, the method comprising: first determining whether a non-zero integer number n exists so that t e =n/2f l ; second determining, when the non-zero integer number n exists, whether non-zero integer numbers for k and l exist so that kf scr =lf l , calculating, when the non-zero integer numbers for k and l do not exist, a third value set including values for f scr fulfilling kf scr =lf l , where k and l are non-zero integer numbers, and determining whether one or more values in the third value set is equal to one or more values in the first value set; and assigning, when the one or more values in the third value set is equal to one or more values in the first value set, f scr to one of the one or more values in the third value set that is equal to one or more values in the first value set, and implementing t e as the exposure time of the camera and f scr as the refresh rate of the screen.