diff --git a/kcc/comic2ebook.py b/kcc/comic2ebook.py
index 517d2e4..ce64abc 100755
--- a/kcc/comic2ebook.py
+++ b/kcc/comic2ebook.py
@@ -310,7 +310,7 @@ def getImageFileName(imgfile):
 
 def applyImgOptimization(img, opt, hqImage=None):
     if not img.fill:
-        img.getImageFill(opt.webtoon)
+        img.getImageFill()
     if not opt.webtoon:
         img.cropWhiteSpace(10.0)
     if opt.cutpagenumbers and not opt.webtoon:
diff --git a/kcc/image.py b/kcc/image.py
index b54c068..8d41196 100755
--- a/kcc/image.py
+++ b/kcc/image.py
@@ -404,7 +404,7 @@ class ComicPage:
             self.image = self.image.crop((0, 0, widthImg - diff, heightImg))
         return self.image
 
-    def getImageHistogram(self, image, new=True):
+    def getImageHistogram(self, image):
         histogram = image.histogram()
         RBGW = []
         pixelCount = 0
@@ -413,78 +413,51 @@ class ComicPage:
             RBGW.append(histogram[i] + histogram[256 + i] + histogram[512 + i])
         white = 0
         black = 0
-        for i in range(251, 256):
+        for i in range(253, 256):
             white += RBGW[i]
-        for i in range(5):
+        for i in range(3):
             black += RBGW[i]
-        if new:
-            if black > 0 and white == 0:
-                return 1
-            elif white > 0 and black == 0:
-                return -1
-            else:
-                return False
+        if black > pixelCount*0.5 and white == 0:
+            return 1
+        elif white > pixelCount*0.5 and black == 0:
+            return -1
         else:
-            if black > white and black > pixelCount*0.5:
-                return True
-            else:
-                return False
+            return False
 
-    def getImageFill(self, isWebToon):
-        if isWebToon:
-            fill = 0
-            fill += self.getImageHistogram(self.image.crop((0, 0, self.image.size[0], 5)), False)
-            fill += self.getImageHistogram(self.image.crop((0, self.image.size[1]-5, self.image.size[0],
-                                                            self.image.size[1])), False)
-            if fill == 2:
-                self.fill = 'black'
-            elif fill == 0:
-                self.fill = 'white'
-            else:
-                fill = 0
-                fill += self.getImageHistogram(self.image.crop((0, 0, 5, 5)), False)
-                fill += self.getImageHistogram(self.image.crop((self.image.size[0]-5, 0, self.image.size[0], 5)), False)
-                fill += self.getImageHistogram(self.image.crop((0, self.image.size[1]-5, 5, self.image.size[1])), False)
-                fill += self.getImageHistogram(self.image.crop((self.image.size[0]-5, self.image.size[1]-5,
-                                                                self.image.size[0], self.image.size[1])), False)
-                if fill > 1:
-                    self.fill = 'black'
-                else:
-                    self.fill = 'white'
+    def getImageFill(self):
+        fill = 0
+        # Search fom horizontal solid lines
+        startY = 0
+        stopY = 4
+        searching = True
+        while stopY <= self.image.size[1]:
+            checkSolid = self.getImageHistogram(self.image.crop((0, startY, self.image.size[0], stopY)))
+            if checkSolid:
+                fill += checkSolid
+            startY = stopY + 1
+            stopY = startY + 4
+            if stopY > self.image.size[1] and searching:
+                startY = self.image.size[1] - 4
+                stopY = self.image.size[1]
+                searching = False
+        # Search fom vertical solid lines
+        startX = 0
+        stopX = 4
+        searching = True
+        while stopX <= self.image.size[0]:
+            checkSolid = self.getImageHistogram(self.image.crop((startX, 0, stopX, self.image.size[1])))
+            if checkSolid:
+                fill += checkSolid
+            startX = stopX + 1
+            stopX = startX + 4
+            if stopX > self.image.size[0] and searching:
+                startX = self.image.size[0] - 4
+                stopX = self.image.size[0]
+                searching = False
+        if fill > 0:
+            self.fill = 'black'
         else:
-            fill = 0
-            # Search fom horizontal solid lines
-            startY = 0
-            stopY = 3
-            searching = True
-            while stopY <= self.image.size[1]:
-                checkSolid = self.getImageHistogram(self.image.crop((0, startY, self.image.size[0], stopY)))
-                if checkSolid:
-                    fill += checkSolid
-                startY = stopY + 1
-                stopY = startY + 3
-                if stopY > self.image.size[1] and searching:
-                    startY = self.image.size[1] - 3
-                    stopY = self.image.size[1]
-                    searching = False
-            # Search fom vertical solid lines
-            startX = 0
-            stopX = 3
-            searching = True
-            while stopX <= self.image.size[0]:
-                checkSolid = self.getImageHistogram(self.image.crop((startX, 0, stopX, self.image.size[1])))
-                if checkSolid:
-                    fill += checkSolid
-                startX = stopX + 1
-                stopX = startX + 3
-                if stopX > self.image.size[0] and searching:
-                    startX = self.image.size[0] - 3
-                    stopX = self.image.size[0]
-                    searching = False
-            if fill > 0:
-                self.fill = 'black'
-            else:
-                self.fill = 'white'
+            self.fill = 'white'
 
     def isImageColor(self, image):
         v = ImageStat.Stat(image).var