Abstract: This paper presents an adaptive target tracking method based on optical projection on the PTZ camera. The object size in the image varies while the PTZ camera moving, however, the real object size is invariable, and the projection size on the horizontal of the real object is inversely proportional to the size of the object in the image. Therefore, we project the real 3D object to the image to achieve the adaptive window problem in object tracking algorithm. Experimental results demonstrate that this method can figure out the size of the object more accurately.

Key words: adaptive window, target tracking, projection