Figure 7From: Localized Detection of Abandoned LuggageThe leftmost image is the queried head-shoulder contour. Given the input image, the edge image is obtained via 3 × 3 Sobel convolution. Adopting traditional HT will generate a detection result giving more false positives. The improved HT method yields a single large response at the correct location of the most visible head-shoulder contour in the input edge image.Back to article page