Synthetic views of the roughness model for feature MAT05 in comparison with the real images. a) Real image of the feature. b) Synthetic image of the feature in the same view and illumination as in (a), (c). Real image of the feature location before the feature was detected. d) Synthetic image of the feature in the same view and illumination as in (c). The same brightness scale is used for the real and synthetic images for each comparison.