clearer Lanczos2D comments

diff --git a/magick/resize.c b/magick/resize.c
index 223abeca7ff69d5956501b85a8860bf70a67aee5..70623275e6529278eeabbf0fbe02226bae1ebcc5 100644 (file)
--- a/magick/resize.c
+++ b/magick/resize.c
@@ -927,20 +927,21 @@ MagickExport ResizeFilter *AcquireResizeFilter(const Image *image,
         * line (equal to 1, say, on a black=0 background) is exactly
         * preserved when no-op is applied to the image.  It also
         * ensures that---with no-op---the nearest two columns on
-        * either side are minimally changed. Specifically, nearest
-        * columns on the left and the right are raised to c from
-        * zero, and the second closest columns on the left and right
-        * are lower by c from 0. (Hence, the closest columns are made
-        * slightly positive, and the second closest are made slightly
-        * negative, equally.) All the other columns are
-        * unchanged. The size c of this blur/ripple is .002042317
+        * either side are minimally changed (the farther columns are
+        * unchanged). Specifically, nearest columns on the left and
+        * the right are raised to c from zero, and the second closest
+        * columns on the left and right are lower by c from
+        * 0. (Hence, the closest columns are made slightly positive,
+        * and the second closest are made slightly negative, in equal
+        * amounts.) The size c of this blur/ripple is .002042317
         * (about one fifth of one percent). Consequently, this choice
         * of scaling of the support of the standard Lanczos2D
         * preserves "contant on columns" images with values between
-        * -1 and 1 to within .00817 (within one percent).
+        * -1 and 1, to within .00817 (within one percent).
         *
-        * This special scaling was discovered by Nicolas Robidoux of
-        * Laurentian University.
+        * This special scaling of the standard Lanczos2D kernel in
+        * the context of Elliptical Weighted Average resampling was
+        * discovered by Nicolas Robidoux of Laurentian University.
         *
         * resize_filter->blur, below, is 1/s.
          */