Patent ID: 6178205
Filing Date: 2001-01-23
Classification: H04N

Abstract:
A method for improving appearance of a video image, comprising:representing a first frame in the video image by a first array of pixel values and a second frame in the video image by a second array of pixel values;selecting a plurality of motion vectors for a target pixel value in the first array, wherein each motion vector corresponds to a block of pixel values in the first array and identifies a block of pixel values in the second array;determining a reference value for the target pixel value, wherein the reference value depends on the motion vectors selected for the target pixel value and one or more pixel values from the second array; andcombining the target pixel value with the reference value in a filter operation that generates an output pixel value for a third array, the third array representing improved version of the first frame, wherein the output pixel value is equal to the target pixel value if a difference between the target value and the reference value is greater than a threshold value and is equal to a linear combination of the target pixel value and the reference value if the difference is not greater than the threshold value.