Fix the mishandling of radius in the Gaussian deconvolution (it was off by a factor...

diff --git a/deconvolution_sharpen_effect.cpp b/deconvolution_sharpen_effect.cpp
index ab28eb387d980ec8923ec150b1f3903e04e85f10..38cf0cf3fcbc66bf6f8b9a5e64e65972da977fab 100644 (file)
--- a/deconvolution_sharpen_effect.cpp
+++ b/deconvolution_sharpen_effect.cpp
@@ -268,8 +268,7 @@ void DeconvolutionSharpenEffect::update_deconvolution_kernel()
                        if (gaussian_radius < 1e-3) {
                                val = (x == 0 && y == 0) ? 1.0f : 0.0f;
                        } else {
-                               float z = hypot(x, y) / gaussian_radius;
-                               val = exp(-z * z);
+                               val = exp(-(x*x + y*y) / (2.0 * gaussian_radius * gaussian_radius));
                        }
                        gaussian_h(y + 2 * R, x + 2 * R) = val;
                }