Color rolling detection method and detection device

Abstract

The present invention discloses a color rolling detection method and detection device for an input image, which can detect a phenomenon of color rolling in the image rapidly, efficiently and at a low cost. The detection method includes the steps of: an extracting step for extracting parameter values indicative of the color or brightness of the image in a detection time period T; a preprocessing step for performing a preprocess to the extracted parameter values so as to obtain characteristic values of the image; an initial value setting step for obtaining a first initial value from the characteristic values in an initialization time period of the detection time period T; an average value calculating step for calculating, with respect to each detection cycle Tin the detection time period T, an average value on the time axis of the characteristic values in the detection cycle Tbased on the obtained first initial value; and a detecting step for detecting whether there exists in the detection time period Tsuch a detection cycle Tthat the characteristic values in the detection cycle Talways maintain a deviation in a specific direction relative to the average value thereof, wherein if so, then occurrence of the color rolling is judged; otherwise, no occurrence of the color rolling is judged.