From 530ae410d4ee591dd6225dbf8d6ff04e054a9a42 Mon Sep 17 00:00:00 2001
From: Alex Xu <alexkurosakimh3@gmail.com>
Date: Mon, 20 Oct 2025 18:38:35 -0700
Subject: [PATCH] detect silver color (#1129)

---
 kindlecomicconverter/image.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/kindlecomicconverter/image.py b/kindlecomicconverter/image.py
index 228ce36..f0fc6e6 100755
--- a/kindlecomicconverter/image.py
+++ b/kindlecomicconverter/image.py
@@ -329,7 +329,7 @@ class ComicPage:
         _, cb, cr = img.split()
 
         # get rid of some jpg compression
-        cutoff = (.1, .1)
+        cutoff = (.2, .2)
         cb_hist, cr_hist = self.histograms_cutoff(cb, cr, cutoff)
 
         cb_nonzero = [i for i, e in enumerate(cb_hist) if e]
@@ -343,7 +343,8 @@ class ComicPage:
             return False
         
         # check for large amount of extreme colors
-        DIFF_THRESHOLD = 12
+        # 11 if too high. 10 is barely enough. If needed make it magnitude of both
+        DIFF_THRESHOLD = 10
         if any([
             cb_nonzero[0] <= 128 - DIFF_THRESHOLD, 
             cr_nonzero[0] <= 128 - DIFF_THRESHOLD,