05612743 is referenced by 35 patents and cites 5 patents.

A method for adaptively selecting feature points according to motions of objects between the current frame and the reference frame, comprising: detecting a motion vector for each pixel in the current frame between the current frame and the reference frame; providing a pixel value from the reference frame based on the motion vector for each pixel in the current frame; subtracting the pixel value provided from the reference frame from a pixel value of said each pixel of the current frame to thereby provide a differential pixel value; comparing the differential pixel value with a threshold value TH and selecting regions having their respective differential pixel values larger than the threshold value TH; shifting the pixels within the selected regions to positions indicated by their respective motion vectors to thereby provide shifted regions; detecting edge points from the reference frame; determining processing regions from the shifted regions, wherein the shifted regions are overlapped with a portion of the edge points; generating a first grid on the reference frame and a second grid for each of the processing regions, wherein the second grid is formed by a portion of grid points of the first grid and newly added grid points; and selecting, as the feature points, a multiplicity of pixels in the reference frame based on the first and the second grids and the edge points.

Title
Method for encoding a video signal using feature point based motion estimation
Application Number
8/498553
Publication Number
5612743
Application Date
July 5, 1995
Publication Date
March 18, 1997
Inventor
Min Sup Lee
Seoul
KR
Agent
Anderson Kill & Olick P C
Assignee
Daewoo Electronics
KR
IPC
H04N 7/133
View Original Source