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Difference of Gaussian kernel
k = kdog(sigma1) is a 2-dimensional difference of Gaussian kernel equal to KGAUSS(sigma1) - KGAUSS(SIGMA2), where sigma1 > SIGMA2. By default SIGMA2 = 1.6*sigma1. The kernel is centred within the matrix k whose half-width H = 3xSIGMA and W=2xH+1.
k = kdog(sigma1, sigma2) as above but sigma2 is specified directly.
k = kdog(sigma1, sigma2, H) as above but the kernel half-width is specified.
© 1990-2012 Peter Corke.