Figure 5. a) to e) Representative image frames of a white 2 x 2 pixel square moving from left to right at 50 ms per frame and being b) partially to c) completely occluded by a stationary 2 x 2 pixel red square. f) VOC response of our proof-of-concept 2 x 10 pixel sensor tracking a 2 x 2 pixel white square moving at various uniform speeds. g) VOC response of our proof-of-concept sensor tracking the moving white square undergoing occlusion as illustrated in Figures a) to e). Pixel numbering for the corresponding curves follow Figure 1c. The time regions marked by the dashed vertical red lines refer to the according scenarios b), c), and d). The pixels 11-14, marked red, are exposed to the stationary red foreground. Black arrows (just a few presented as examples) indicate the VOC values at the instance the object has past and is not being perceived anymore by the corresponding pixels. h) Occlusion handling algorithm, with the numbered instruction steps described in detail in the text. i) Box plot corresponding to Figure 5f.