diff --git a/dlibrary/dlibrary.py b/dlibrary/dlibrary.py
index de0279e..b3e198e 100755
--- a/dlibrary/dlibrary.py
+++ b/dlibrary/dlibrary.py
@@ -28,7 +28,15 @@ FANZA_ID_REGEX = re.compile('^d_[0-9]+$')
 FAKKU_ID_REGEX = re.compile('.*_FAKKU$')
 
 HI_RES_REGEX = re.compile('高解像度', re.IGNORECASE)
-NO_TONE_REGEX = re.compile('トーン.*[な無]し|グレースケール')
+NO_TONE_REGEX = re.compile('トーン(効果)?[な無]し|グレースケール', re.IGNORECASE)
+TONE_REGEX = re.compile('トーン(版|(効果)?[有あ]り)', re.IGNORECASE)
+COLOR_REGEX = re.compile('カラー', re.IGNORECASE)
+MONOCHROME_REGEX = re.compile('モノクロ', re.IGNORECASE)
+IMAGE_QUALITY_REGEXES = [
+    { 'better': HI_RES_REGEX },
+    { 'better': NO_TONE_REGEX, 'worse': TONE_REGEX },
+    { 'better': COLOR_REGEX, 'worse': MONOCHROME_REGEX },
+]
 
 TEXTLESS_REGEX = re.compile('(台詞|セリフ|せりふ|テキスト|文字)((な|無)し|抜き)|notext|textless', re.IGNORECASE)
 FRONT_COVER_REGEX = re.compile('(^|[^裏])表紙|cover|hyoushi', re.IGNORECASE)
@@ -556,12 +564,19 @@ def collate_from_paths(srcs, dest, start_index, exclude):
         return 0
 
     if len(srcs) == 2 and all(src.is_dir() for src in srcs):
-        better_version_dirs = [src for src in srcs if HI_RES_REGEX.search(nname(src)) or NO_TONE_REGEX.search(nname(src))]
-        if len(better_version_dirs) == 1:
-            better_version_dir = better_version_dirs[0]
-            worse_version_dir = next(src for src in srcs if src != better_version_dir)
-            if len(descendant_files_ignore(worse_version_dir, exclude)) == len(descendant_files_ignore(better_version_dir, exclude)):
-                return collate_from_paths([better_version_dir], dest, start_index, exclude)
+        for quality in IMAGE_QUALITY_REGEXES:
+            def a_not_b(a, b, src):
+                if a in quality:
+                    return quality[a].search(nname(src))
+                else:
+                    return not quality[b].search(nname(src))
+            better_srcs = [src for src in srcs if a_not_b('better', 'worse', src)]
+            worse_srcs = [src for src in srcs if a_not_b('worse', 'better', src)]
+            if len(better_srcs) == 1 and len(worse_srcs) == 1 and better_srcs[0] != worse_srcs[0]:
+                better = better_srcs[0]
+                worse = worse_srcs[0]
+                if len(descendant_files_ignore(better, exclude)) == len(descendant_files_ignore(worse, exclude)):
+                    return collate_from_paths([better], dest, start_index, exclude)
 
     images_vs_pdf = try_collate_images_vs_pdf(srcs, dest, start_index, exclude)
     if images_vs_pdf != False: