Figure 2 The original radiograph with a region of interest (ROI). (a) The selected ROI. (b) The result of blurring this region. (c) The result of subtracting B from A and adding 128. (d) Binary version of the image. (e) The trabecular pattern (white region in image 2d) is outlined. (f) The addition of images A and E to demonstrate visually that the outlined image corresponds to the original trabeculae