Fig. 4.

Detection of cones in band pass filtered image from Fig. 3. (a) Original image (b) Filtered image, same as Fig. 3(g), with local minima marked in red and maxima in green. (c) Matched pairs of minima and maxima. (d) Final detection results on original image from (a). Cones found using matched pairs are shown in green and the cone found using maximum value only is shown in red.