diff --git a/mainscripts/Sorter.py b/mainscripts/Sorter.py
index 2b1e63d..a802f95 100644
--- a/mainscripts/Sorter.py
+++ b/mainscripts/Sorter.py
@@ -10,15 +10,134 @@ from pathlib import Path
 from utils import Path_utils
 from utils.AlignedPNG import AlignedPNG
 from facelib import LandmarksProcessor
+from utils.SubprocessorBase import SubprocessorBase
+import multiprocessing
 
-def estimate_blur(image):
+
+def estimate_sharpness(image):       
+    height, width = image.shape[:2]
+    
     if image.ndim == 3:
         image = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
 
-    blur_map = cv2.Laplacian(image, cv2.CV_64F)
-    score = np.var(blur_map)
-    return score
+    sharpness = 0
+    for y in range(height):
+        for x in range(width-1):        
+            sharpness += abs( int(image[y, x]) - int(image[y, x+1]) )            
+    
+    for x in range(width):    
+        for y in range(height-1):
+            sharpness += abs( int(image[y, x]) - int(image[y+1, x]) )
+    
+    return sharpness
+    
+
+class BlurEstimatorSubprocessor(SubprocessorBase):
+    #override
+    def __init__(self, input_data ): 
+        self.input_data = input_data
+        self.result = []
+
+        super().__init__('BlurEstimator', 60)           
+
+    #override
+    def onHostClientsInitialized(self):
+        pass
         
+    #override
+    def process_info_generator(self):    
+        for i in range(0, multiprocessing.cpu_count() ):
+            yield 'CPU%d' % (i), {}, {'device_idx': i,
+                                      'device_name': 'CPU%d' % (i), 
+                                      }
+
+    #override
+    def get_no_process_started_message(self):
+        print ( 'Unable to start CPU processes.')
+        
+    #override
+    def onHostGetProgressBarDesc(self):
+        return None
+        
+    #override
+    def onHostGetProgressBarLen(self):
+        return len (self.input_data)
+        
+    #override
+    def onHostGetData(self):
+        if len (self.input_data) > 0:
+            return self.input_data.pop(0)    
+        
+        return None
+    
+    #override
+    def onHostDataReturn (self, data):
+        self.input_data.insert(0, data)   
+        
+    #override
+    def onClientInitialize(self, client_dict):
+        self.safe_print ('Running on %s.' % (client_dict['device_name']) )
+        return None
+
+    #override
+    def onClientFinalize(self):
+        pass
+        
+    #override
+    def onClientProcessData(self, data):
+        filename_path = Path( data[0] )
+        image = cv2.imread( str(filename_path) )
+        face_mask = None        
+        
+        a_png = AlignedPNG.load( str(filename_path) )        
+        if a_png is not None:
+            d = a_png.getFaceswapDictData()
+            if (d is not None) and (d['landmarks'] is not None):            
+                face_mask = LandmarksProcessor.get_image_hull_mask (image, np.array(d['landmarks']))
+        
+        if face_mask is not None:
+            image = (image*face_mask).astype(np.uint8)
+        else:
+            print ( "%s - no embedded data found." % (str(filename_path)) ) 
+            return [ str(filename_path), 0 ]
+        
+        return [ str(filename_path), estimate_sharpness( image ) ]
+
+    #override
+    def onClientGetDataName (self, data):
+        #return string identificator of your data
+        return data[0]
+        
+    #override
+    def onHostResult (self, data, result):
+        if result[1] == 0:
+            filename_path = Path( data[0] )
+            print ( "{0} - invalid image, renaming to {0}_invalid.".format(str(filename_path)) ) 
+            filename_path.rename ( str(filename_path) + '_invalid' )
+        else:
+            self.result.append ( result )
+        return 1
+    
+    #override    
+    def onHostProcessEnd(self):
+        pass
+             
+    #override
+    def get_start_return(self):
+        return self.result
+
+    
+def sort_by_blur(input_path):
+    print ("Sorting by blur...")        
+    
+    img_list = [ (filename,[]) for filename in Path_utils.get_image_paths(input_path) ] 
+    img_list = BlurEstimatorSubprocessor (img_list).process()
+    
+    print ("Sorting...")
+    img_list = sorted(img_list, key=operator.itemgetter(1), reverse=True)
+
+    return img_list
+    
 def sort_by_brightness(input_path):
     print ("Sorting by brightness...")
     img_list = [ [x, np.mean ( cv2.cvtColor(cv2.imread(x), cv2.COLOR_BGR2HSV)[...,2].flatten()  )] for x in tqdm( Path_utils.get_image_paths(input_path), desc="Loading") ]
@@ -33,18 +152,6 @@ def sort_by_hue(input_path):
     img_list = sorted(img_list, key=operator.itemgetter(1), reverse=True)    
     return img_list
     
-def sort_by_blur(input_path):
-    img_list = []
-    print ("Sorting by blur...")        
-    for filepath in tqdm( Path_utils.get_image_paths(input_path), desc="Loading"):
-        #never mask it by face hull, it worse than whole image blur estimate
-        img_list.append ( [filepath, estimate_blur (cv2.imread( filepath ))] )
-    
-    print ("Sorting...")
-    img_list = sorted(img_list, key=operator.itemgetter(1), reverse=True)
-
-    return img_list
-
 def sort_by_face(input_path):
 
     print ("Sorting by face similarity...")
@@ -168,7 +275,7 @@ def sort_by_hist_blur(input_path):
         img_list.append ([x, cv2.calcHist([img], [0], None, [256], [0, 256]),
                              cv2.calcHist([img], [1], None, [256], [0, 256]),
                              cv2.calcHist([img], [2], None, [256], [0, 256]),
-                             estimate_blur(img)
+                             estimate_sharpness(img)
                          ])
 
     img_list_len = len(img_list)