From 4028f7a1b28a656330a2685748e8f540bd89763f Mon Sep 17 00:00:00 2001 From: nicolas Date: Fri, 8 Oct 2010 00:30:57 +0000 Subject: [PATCH] Lanczos2D comments --- magick/resize.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/magick/resize.c b/magick/resize.c index 28dd3aba4..bb7684675 100644 --- a/magick/resize.c +++ b/magick/resize.c @@ -938,9 +938,11 @@ MagickExport ResizeFilter *AcquireResizeFilter(const Image *image, * half of one percent of the dynamic range). * * Note that "high frequency modes" which are not aligned with - * pixel directions are still considerably damped. The - * amplitude of the checkerboard mode, for example, is reduced - * by 62%. + * image rows or columns are damped considerably. For example, + * the amplitude of the very highest energy mode, the + * so-called "checkerboard" mode, is reduced by almost 62% + * (still less than with "standard" Lanczos2D a comparable + * Gaussian kernel). * * This "optimal" scaling was discovered by Nicolas Robidoux * of Laurentian University. -- 2.50.1