1. A method comprising the steps of: applying an edge detection filter to at least one of a plurality of pixels of an ultrasound image to compute an edge detection value comprising a magnitude; applying a directional edge enhancement filter and not a non-directional smoothing filter to said at least one of said plurality of pixels of said ultrasound image if the magnitude is greater than a threshold value; and if the magnitude is less than the threshold value, selecting a non-directional smoothing filter from a plurality of non-directional smoothing filters based on the magnitude, and applying the selected non-directional smoothing filter and not a directional edge enhancement filter to said at least one of said plurality of pixels of said ultrasound image.