1. A method for identifying objects in an image comprising: generating a gradient vector image from the image, the gradient vector image identifying a gradient magnitude value and a gradient direction for each pixel of the image; identifying, via a processor, lines in the gradient vector image; determining whether the identified lines are perpendicular; determining whether more than a predetermined number of pixels on each of the lines identified as perpendicular have a gradient magnitude greater than a predetermined threshold; determining whether the individual lines which are identified as perpendicular are within a predetermined distance of each other; identifying a portion of the image as an object if the identified lines are perpendicular, more than the predetermined number of pixels on each of the lines have a gradient magnitude greater than the predetermined threshold, and are within a predetermined distance of each other.