Single-Image Crowd Counting via Multi-Column …
If there is a head at pixel xi, we represent it as a delta func-tion δ(x− xi). Hence an image with N heads labeled can be represented as a function H(x) = ∑N i=1 δ(x−xi). To convert this to a continuous density function, we may convolve this function with a Gaussian kernel[17] Gσ so that the density is F(x) = H(x) ∗ Gσ(x). However, such
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