APPARATUS AND METHOD FOR AUTOMATIC AREA ENLARGEMENT CONTROL IN PTZ CAMERA USING SIFT

摘要

PURPOSE: An apparatus and a method for automatically controlling area enlargement function in PTZ(Pan, Tilt, Zoom) camera is provided to automatically enlarging selected area by calculating variable amount of zoom using extracted specific points from PTZ image and interested image. CONSTITUTION: If an enlargement magnification rate is less than a preset enlargement range, an automatic area enlargement control unit moves a photographing position of the PTZ camera to a moving position(220,226). If the magnification rate exceeds a preset magnification range, the automatic area enlargement control unit moves the photographing position of the PTZ camera to the moving position(222). The automatic area enlargement control unit changes the currently set magnification rate of PTZ camera to the calculated magnification rate.