1. A method, comprising: determining bandwidth values for a plurality of windows in a current image of a video sequence comprising a plurality of images, wherein the plurality of windows in the current image cover a contour of an object in the current image, and wherein said determining a bandwidth value for a given window comprises: determining a movement value for the window as an estimate of how much the object has moved in the window in relation to the object in a corresponding window of a temporally adjacent image of the video sequence; and determining a bandwidth value for the window according to the movement value for the window; applying a blending function to the determined bandwidth values for the plurality of windows to generate a blended map for the current image, wherein the blended map provides a smooth transition between the windows in the current image; and generating a variable bandwidth search region for the object in the current image according to the blended map.