Image monitoring apparatus for estimating gradient of singleton, and method therefor

摘要

An image monitoring apparatus includes: a singleton selector selecting at least one singleton from a plurality of objects in an image; a single foreground image generator generating a single foreground image of the singleton; an eigenvector extractor extracting an eigenvector of a foreground singleton contained in the single foreground image using at least one of a centroid of the foreground singleton, the number of pixels of the foreground singleton and coordinate values of the pixels; a vanishing point location calculator generating a reference vector by connecting a predetermined point in the image to the centroid of the foreground singleton, and determining the predetermined point as a vanishing point when the predetermined point minimizes an angle between the reference vector and the eigenvector; and a gradient determiner determining a gradient of the foreground singleton using the vanishing point, and correct an inclination of a bounding box of the foreground singleton.