From 38e235f95895d96c03be4e64ce4263eaac477687 Mon Sep 17 00:00:00 2001 From: Nick White Date: Tue, 4 Aug 2020 16:59:43 +0100 Subject: Improve sauvola window code slightly The sauvola and integral image version are still slightly different, irritatingly. --- testdata/pg1_sauvola_k0.3_w19.png | Bin 19512 -> 19626 bytes testdata/pg1_sauvola_k0.5_w19.png | Bin 18354 -> 18144 bytes testdata/pg1_sauvola_k0.5_w41.png | Bin 18275 -> 18220 bytes util.go | 8 ++++---- 4 files changed, 4 insertions(+), 4 deletions(-) diff --git a/testdata/pg1_sauvola_k0.3_w19.png b/testdata/pg1_sauvola_k0.3_w19.png index e964b19..c357a8a 100644 Binary files a/testdata/pg1_sauvola_k0.3_w19.png and b/testdata/pg1_sauvola_k0.3_w19.png differ diff --git a/testdata/pg1_sauvola_k0.5_w19.png b/testdata/pg1_sauvola_k0.5_w19.png index 780fc4f..a063b28 100644 Binary files a/testdata/pg1_sauvola_k0.5_w19.png and b/testdata/pg1_sauvola_k0.5_w19.png differ diff --git a/testdata/pg1_sauvola_k0.5_w41.png b/testdata/pg1_sauvola_k0.5_w41.png index acce4f3..4544da3 100644 Binary files a/testdata/pg1_sauvola_k0.5_w41.png and b/testdata/pg1_sauvola_k0.5_w41.png differ diff --git a/util.go b/util.go index 7cbaebc..52026cb 100644 --- a/util.go +++ b/util.go @@ -50,11 +50,11 @@ func surrounding(img *image.Gray, x int, y int, size int) []int { b := img.Bounds() step := size / 2 - miny := y - step + miny := y - step - 1 if miny < b.Min.Y { miny = b.Min.Y } - minx := x - step + minx := x - step - 1 if minx < b.Min.X { minx = b.Min.X } @@ -68,8 +68,8 @@ func surrounding(img *image.Gray, x int, y int, size int) []int { } var s []int - for yi := miny; yi <= maxy; yi++ { - for xi := minx; xi <= maxx; xi++ { + for yi := miny; yi < maxy; yi++ { + for xi := minx; xi < maxx; xi++ { s = append(s, int(img.GrayAt(xi, yi).Y)) } } -- cgit v1.2.1-24-ge1ad