diff --git a/ASCII/plugin.py b/ASCII/plugin.py
index 5fec01a..56a2f31 100644
--- a/ASCII/plugin.py
+++ b/ASCII/plugin.py
@@ -24,7 +24,6 @@ import time
 import random as random
 import pyimgur
 from bs4 import BeautifulSoup
-import hitherdither
 
 try:
     from supybot.i18n import PluginInternationalization
@@ -451,26 +450,19 @@ class ASCII(callbacks.Plugin):
             colors = list(self.colors99.keys())
         else:
             colors = list(self.colors83.keys())
-        if speed != 'dithered':
-            try:
-                return self.matches[pixel]
-            except KeyError:
-                closest_colors = sorted(colors, key=lambda color: self.distance(color, self.rgb2lab(pixel), speed))
-                closest_color = closest_colors[0]
-                if self.colors == 16:
-                    self.matches[pixel] = self.colors16[closest_color]
-                elif self.colors == 99:
-                    self.matches[pixel] = self.colors99[closest_color]
-                else:
-                    self.matches[pixel] = self.colors83[closest_color]
-                return self.matches[pixel]
-        else:
+        try:
+            return self.matches[pixel]
+        except KeyError:
+            closest_colors = sorted(colors, key=lambda color: self.distance(color, self.rgb2lab(pixel), speed))
+            closest_color = closest_colors[0]
             if self.colors == 16:
-                return self.rgbColors.index(pixel, 0, 15)
+                self.matches[pixel] = self.colors16[closest_color]
             elif self.colors == 99:
-                return self.rgbColors.index(pixel, 0, 98)
+                self.matches[pixel] = self.colors99[closest_color]
             else:
-                return self.rgbColors.index(pixel, 16, 98)
+                self.matches[pixel] = self.colors83[closest_color]
+            return self.matches[pixel]
+            
     def rgb2lab (self, inputColor) :
         try:
             return self.labmatches[inputColor]
@@ -808,16 +800,12 @@ class ASCII(callbacks.Plugin):
         gscale = "\xa0"
         if '16' in optlist:
             self.colors = 16
-            self.palette = hitherdither.palette.Palette([0xFFFFFF, 0x000000, 0x00007F, 0x009300, 0xFF0000, 0x7F0000, 0x9C009C, 0xFC7F00, 0xFFFF00, 0x00FC00, 0x009393, 0x00FFFF, 0x0000FC, 0xFF00FF, 0x7F7F7F])
         elif '83' in optlist:
             self.colors = 83
-            self.palette = hitherdither.palette.Palette([0x00007F, 0x009300, 0x7F0000, 0x9C009C, 0xFC7F00, 0x00FC00, 0x009393, 0x0000FC, 0x7F7F7F, 0xD2D2D2, 0x470000, 0x472100, 0x474700, 0x324700, 0x004700, 0x00472C, 0x004747, 0x002747, 0x000047, 0x2E0047, 0x470047, 0x47002A, 0x740000, 0x743A00, 0x747400, 0x517400, 0x007400, 0x007449, 0x007474, 0x004074, 0x000074, 0x4B0074, 0x740074, 0x740045, 0xB50000, 0xB56300, 0xB5B500, 0x7DB500, 0x00B500, 0x00B571, 0x00B5B5, 0x0063B5, 0x0000B5, 0x7500B5, 0xB500B5, 0xB5006B, 0xFF0000, 0xFF8C00, 0xFFFF00, 0xB2FF00, 0x00FF00, 0x00FFA0, 0x00FFFF, 0x008CFF, 0x0000FF, 0xA500FF, 0xFF00FF, 0xFF0098, 0xFF5959, 0xFFB459, 0xFFFF71, 0xCFFF60, 0x6FFF6F, 0x65FFC9, 0x6DFFFF, 0x59B4FF, 0x5959FF, 0xC459FF, 0xFF66FF, 0xFF59BC, 0xFF9C9C, 0xFFD39C, 0xFFFF9C, 0xE2FF9C, 0x9CFF9C, 0x9CFFDB, 0x9CFFFF, 0x9CD3FF, 0x9C9CFF, 0xDC9CFF, 0xFF9CFF, 0xFF94D3, 0x000000, 0x131313, 0x282828, 0x363636, 0x4D4D4D, 0x656565, 0x818181, 0x9F9F9F, 0xBCBCBC, 0xE2E2E2, 0xFFFFFF])
         elif '99' in optlist:
             self.colors = 99
-            self.palette = hitherdither.palette.Palette([0x00007F, 0x009300, 0x7F0000, 0x9C009C, 0xFC7F00, 0x00FC00, 0x009393, 0x0000FC, 0x7F7F7F, 0xD2D2D2, 0x470000, 0x472100, 0x474700, 0x324700, 0x004700, 0x00472C, 0x004747, 0x002747, 0x000047, 0x2E0047, 0x470047, 0x47002A, 0x740000, 0x743A00, 0x747400, 0x517400, 0x007400, 0x007449, 0x007474, 0x004074, 0x000074, 0x4B0074, 0x740074, 0x740045, 0xB50000, 0xB56300, 0xB5B500, 0x7DB500, 0x00B500, 0x00B571, 0x00B5B5, 0x0063B5, 0x0000B5, 0x7500B5, 0xB500B5, 0xB5006B, 0xFF0000, 0xFF8C00, 0xFFFF00, 0xB2FF00, 0x00FF00, 0x00FFA0, 0x00FFFF, 0x008CFF, 0x0000FF, 0xA500FF, 0xFF00FF, 0xFF0098, 0xFF5959, 0xFFB459, 0xFFFF71, 0xCFFF60, 0x6FFF6F, 0x65FFC9, 0x6DFFFF, 0x59B4FF, 0x5959FF, 0xC459FF, 0xFF66FF, 0xFF59BC, 0xFF9C9C, 0xFFD39C, 0xFFFF9C, 0xE2FF9C, 0x9CFF9C, 0x9CFFDB, 0x9CFFFF, 0x9CD3FF, 0x9C9CFF, 0xDC9CFF, 0xFF9CFF, 0xFF94D3, 0x000000, 0x131313, 0x282828, 0x363636, 0x4D4D4D, 0x656565, 0x818181, 0x9F9F9F, 0xBCBCBC, 0xE2E2E2, 0xFFFFFF])
         else:
             self.colors = self.registryValue('colors', msg.args[0])
-            self.palette = hitherdither.palette.Palette([0x00007F, 0x009300, 0x7F0000, 0x9C009C, 0xFC7F00, 0x00FC00, 0x009393, 0x0000FC, 0x7F7F7F, 0xD2D2D2, 0x470000, 0x472100, 0x474700, 0x324700, 0x004700, 0x00472C, 0x004747, 0x002747, 0x000047, 0x2E0047, 0x470047, 0x47002A, 0x740000, 0x743A00, 0x747400, 0x517400, 0x007400, 0x007449, 0x007474, 0x004074, 0x000074, 0x4B0074, 0x740074, 0x740045, 0xB50000, 0xB56300, 0xB5B500, 0x7DB500, 0x00B500, 0x00B571, 0x00B5B5, 0x0063B5, 0x0000B5, 0x7500B5, 0xB500B5, 0xB5006B, 0xFF0000, 0xFF8C00, 0xFFFF00, 0xB2FF00, 0x00FF00, 0x00FFA0, 0x00FFFF, 0x008CFF, 0x0000FF, 0xA500FF, 0xFF00FF, 0xFF0098, 0xFF5959, 0xFFB459, 0xFFFF71, 0xCFFF60, 0x6FFF6F, 0x65FFC9, 0x6DFFFF, 0x59B4FF, 0x5959FF, 0xC459FF, 0xFF66FF, 0xFF59BC, 0xFF9C9C, 0xFFD39C, 0xFFFF9C, 0xE2FF9C, 0x9CFF9C, 0x9CFFDB, 0x9CFFFF, 0x9CD3FF, 0x9C9CFF, 0xDC9CFF, 0xFF9CFF, 0xFF94D3, 0x000000, 0x131313, 0x282828, 0x363636, 0x4D4D4D, 0x656565, 0x818181, 0x9F9F9F, 0xBCBCBC, 0xE2E2E2, 0xFFFFFF])
         if 'fast' in optlist:
             speed = 'fast'
         elif 'slow' in optlist:
@@ -828,11 +816,6 @@ class ASCII(callbacks.Plugin):
             delay = optlist.get('delay')
         else:
             delay = self.registryValue('delay', msg.args[0])
-        if 'dither' in optlist:
-            dither = optlist.get('dither')
-            speed = 'dithered'
-        else:
-            dither = False
         if 'quantize' in optlist:
             quantize = True
         elif 'no-quantize' in optlist:
@@ -927,7 +910,7 @@ class ASCII(callbacks.Plugin):
         h = w/scale
         # compute number of rows
         rows = int(H/h)
-        image = ImageOps.autocontrast(image)
+        #image = ImageOps.autocontrast(image)
         if type != 'no-color':
             if 'resize' in optlist:
                 resize = optlist.get('resize')
@@ -936,10 +919,7 @@ class ASCII(callbacks.Plugin):
             image2 = image.resize((cols, rows), resize)
             if 's' in optlist:
                 image2 = ImageEnhance.Color(image2).enhance(s)
-            if dither:
-                image2 = hitherdither.diffusion.error_diffusion_dithering(image2, self.palette, method=dither)
-                image2 = image2.convert('RGB')
-            elif quantize:
+            if quantize:
                 image2 = image2.quantize(dither=None)
                 image2 = image2.convert('RGB')
             colormap = np.array(image2)
@@ -1261,7 +1241,7 @@ class ASCII(callbacks.Plugin):
                 irc.reply(line, prefixNick=False, noLengthCheck=True, private=False, notice=False, to=channel)
         if self.registryValue('pasteEnable', msg.args[0]):
             irc.reply(self.doPaste(url, paste), private=False, notice=False, to=channel)
-    img = wrap(img,[optional('channel'), getopts({'w':'int', 'invert':'', 'fast':'', 'slow':'', '16':'', '99':'', '83':'', 'delay':'float', 'resize':'int', 'dither':'text', 'quantize':'', 'no-quantize':'', 'chars':'text', 'bg':'int', 'fg':'int', 'ramp':'text', 'no-color':'', 'block':'', 'ascii':'', '1/4':'', '1/2':'', 's':'float', 'tops':''}), ('text')])
+    img = wrap(img,[optional('channel'), getopts({'w':'int', 'invert':'', 'fast':'', 'slow':'', '16':'', '99':'', '83':'', 'delay':'float', 'resize':'int', 'quantize':'', 'no-quantize':'', 'chars':'text', 'bg':'int', 'fg':'int', 'ramp':'text', 'no-color':'', 'block':'', 'ascii':'', '1/4':'', '1/2':'', 's':'float', 'tops':''}), ('text')])
 
     def scroll(self, irc, msg, args, channel, optlist, url):
         """[<channel>] [--delay] <url>