Patent ID: 8908101
Filing Date: 2014-12-09
Classification: G06T,H04N

Abstract:
1. A method of reducing noise in a video image, the method comprising: detecting motion information about a current frame based on a difference between the current frame and a previous frame in which temporal noise is reduced reducing temporal noise in the current frame, according to the motion information about the current frame; and wherein the detecting the motion information comprises: calculating an average difference by subtracting an offset value set according to a noise level from a sum of absolute difference (SAD) of corresponding pixels between the current frame and the previous frame, in a local window, calculating a first motion detection coefficient regarding a center pixel of the local window based on a constant set according to the offset value, and the average difference; calculating a second motion detection coefficient via a weighted sum of an average value and a minimum value of the first motion detection coefficient, in the local window; and calculating a third motion detection coefficient of the current frame based on the second motion detection coefficient and a third motion detection coefficient of the previous frame, in the local window.