Changes between Version 12 and Version 13 of libpipi/research/filters Tweet

Timestamp:

10/22/2008 03:23:35 PM (15 years ago)

Author:

Sam Hocevar

Comment:

LaTeX shit

libpipi/research/filters

@@ -5 +5 @@
 The usual way to create a Gaussian kernel is to evaluate a Gaussian function at the center of each cell:
 
- k[i][j] = exp(-(i²+j²)/2σ)
+{{{
+#!latex
+$k_{i,j} = e^{-\dfrac{i^2+j^2}{2\sigma}}$
+}}}
 
 This usually works well, except when the kernel is thin (σ < 1). It gets worse when using our generalised kernel:
 
- k[i][j] = exp(-((i×cosθ-j×sinθ-dx)²+(j×cosθ+i×sinθ-dy)²)/2σ)
+{{{
+#!latex
+$k_{i,j} = e^{-\dfrac{(i\cos\theta-j\sin\theta-dx)^2+(j\cos\theta+i\sin\theta-dy)^2}{2\sigma}}$
+}}}
 
 {{{