Patent ID: 6069918
Filing Date: 2000-05-30
Classification: G06K,G06T

Abstract:
A method for detecting moved objects in chronologically successive pictures, wherein for block-oriented analysis a current picture is divided into picture blocks, for each picture block one picture signal of the current picture is compared with a picture signal of a corresponding picture block of a first reference picture that precedes the current picture in the chronological succession of pictures,in that in particular a picture signal change and/or a textural change is ascertained, characterized in that for detecting a change, the difference between the picture signals of the current picture and the picture signals of a second reference picture without moved objects is compared pixel-precisely with a predetermined first threshold; that if the predetermined first threshold is exceeded, then in an object-oriented analysis the size and/or shape of an object is ascertained and the picture signals that represent the moved object are compared with the picture signals of the corresponding picture region of the first reference picture, in particular by ascertaining a picture signal change and/or a textural change; that for at least one moved object of the current picture that undershoots a predetermined first size threshold, a motion estimate is made by association with a corresponding picture region of the first reference picture and formation of an associated motion vector; that if a predetermined second threshold is exceeded by the amount of the estimated motion vector, the object is delivered for chronological monitoring; and that if a predetermined third threshold is exceeded by the amount of the estimated motion vector, the object is detected as a moved object.