Patent ID: 6360025
Filing Date: 2002-03-19
Classification: G06T

Abstract:
An image processing method for reducing the noise in an image (Jt), comprisingdetermining three temporal intensities relating to a current pixel (P(x,y)) in the same location (x,y) in three successive images (Jtâˆ’1, Jt, Jt+1) in a sequence, the image to be processed being the central image (Jt) of the sequence testing of three temporal intensities (Gtâˆ’1, Gt, Gt+1, previously smoothed for noise peaks, in order to distinguish a first case in which the smoothed temporal intensity (Gt) in the central image (Jt) is substantially different from the other two smoothed temporal intensities (Gtâˆ’1, Gt+1) from a second case in which the smoothed temporal intensity (Gt) in the central image (Jt) is substantially equal to at least one of the other two smoothed temporal intensities (Gtâˆ’1, Gt+1), and assigning a noise filtered intensity (Rt) to the current pixel (P(x,y)) in the central image (Jt) which in the first case is directly the smoothed temporal intensity (Gt) at the current pixel in the central image and which in the second case is the result of a temporal median filter applied to the three smoothed temporal intensities (Gtâˆ’1, Gt, Gt+1) in the second case.