Fig. 7. (A) Image of cuttlefish showing disruptive coloration on sand (i.e. no camouflage). (B) Filtered image using same LoG edge-detection algorithm as in Fig. 6. (C) LoG-filtered image of substrate only. This figure demonstrates that in addition to a human observer being able to discern the animal on the sand substrate easily, the LoG shows that the animal's false edges stand out conspicuously. This makes parts of the animal's body distinct objects on sand.