Patent ID: 6204891
Filing Date: 2001-03-20
Classification: G06T,H04N

Abstract:
A method for temporal filtering of noise in an image of a sequence of digital images, each image being in the form of two-dimensional matrices of pixels, the sequence being formed from a first instant until a present instant (t), said pixels having intensity values which correspond to each instant and are referred to as noisy samples, the method comprising:evaluating for a given pixel location a temporally filtered sample (P.sub.t.sup.p) of the present instant by combining into a first combination the temporally filtered sample (P.sub.t-1.sup.c) of the previous instant multiplied by a first weight (W.sub.1) and a noisy sample (I.sub.t.sup.p) of the present instant multiplied by a second weight (W.sub.2), wherein the second weight is a function of a probability value (.beta..sub.t.sup.p) concerning absence of a noise peak in the noisy sample.