diff --git a/dlibrary/dlibrary.py b/dlibrary/dlibrary.py
index cf8b69b..a08ccbc 100755
--- a/dlibrary/dlibrary.py
+++ b/dlibrary/dlibrary.py
@@ -47,8 +47,8 @@ LANGUAGE_REGEXES = {
 }
 
 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.I)
-FRONT_COVER_REGEX = re.compile('(^|[^裏])表紙|cover|hyoushi', re.I)
-BACK_COVER_REGEX = re.compile('裏表紙', re.I)
+FRONT_COVER_REGEX = re.compile('(?<!裏)表紙(?!裏)|(?<!back[-_ ])(?<!back)cover|(?<!ura[-_ ])(?<!ura)hyoush?i(?![-_ ]?ura)', re.I)
+BACK_COVER_REGEX = re.compile('裏表紙|hyoush?i[-_ ]?ura|ura[-_ ]?hyoush?i', re.I)
 BONUS_REGEX = re.compile('設定|キャラ|特典|ポスター', re.I)
 EPILOGUE_REGEX = re.compile('after|後日談|おまけ', re.I)
 SPLITS = [
@@ -266,6 +266,8 @@ class Collator:
         self.index = 0
 
     def collate_from_paths(self, srcs):
+        srcs = [src for src in srcs if len(descendant_files_ignore(src, self.exclude)) > 0]
+
         if len(srcs) == 1 and srcs[0].is_dir():
             return self.collate_from_paths(ls_ignore(srcs[0], self.exclude))