1. A method for processing an image, comprising the steps of: comparing a first image intensity associated with a subject image portion with a second image intensity associated with an adjacent image portion; determining an image intensity difference between the first image intensity and the second image intensity; classifying the subject image portion as a candidate edge portion in response to a determination that the first image intensity is less than the second image intensity and a determination that the image intensity difference is greater than a predetermined threshold image intensity difference; determining whether the candidate edge portion is a true edge portion; and associating the subject image portion with a third image intensity, wherein the third image intensity is less than the first image intensity.