diff --git a/qurator/eynollah/utils/contour.py b/qurator/eynollah/utils/contour.py
index bf53fcd..980eca3 100644
--- a/qurator/eynollah/utils/contour.py
+++ b/qurator/eynollah/utils/contour.py
@@ -41,7 +41,7 @@ def get_text_region_boxes_by_given_contours(contours):
     del contours
     return boxes, contours_new
 
-def filter_contours_area_of_image(image, contours, hirarchy, max_area, min_area):
+def filter_contours_area_of_image(image, contours, hierarchy, max_area, min_area):
     found_polygons_early = list()
     jv = 0
     for c in contours:
@@ -50,12 +50,12 @@ def filter_contours_area_of_image(image, contours, hirarchy, max_area, min_area)
 
         polygon = geometry.Polygon([point[0] for point in c])
         area = polygon.area
-        if area >= min_area * np.prod(image.shape[:2]) and area <= max_area * np.prod(image.shape[:2]) and hirarchy[0][jv][3] == -1:  # and hirarchy[0][jv][3]==-1 :
+        if area >= min_area * np.prod(image.shape[:2]) and area <= max_area * np.prod(image.shape[:2]) and hierarchy[0][jv][3] == -1:  # and hirarchy[0][jv][3]==-1 :
             found_polygons_early.append(np.array([[point] for point in polygon.exterior.coords], dtype=np.uint))
         jv += 1
     return found_polygons_early
 
-def filter_contours_area_of_image_tables(image, contours, hirarchy, max_area, min_area):
+def filter_contours_area_of_image_tables(image, contours, hierarchy, max_area, min_area):
     found_polygons_early = list()
 
     jv = 0
@@ -68,8 +68,8 @@ def filter_contours_area_of_image_tables(image, contours, hirarchy, max_area, mi
         area = polygon.area
         ##print(np.prod(thresh.shape[:2]))
         # Check that polygon has area greater than minimal area
-        # print(hirarchy[0][jv][3],hirarchy )
-        if area >= min_area * np.prod(image.shape[:2]) and area <= max_area * np.prod(image.shape[:2]):  # and hirarchy[0][jv][3]==-1 :
+        # print(hierarchy[0][jv][3],hirarchy )
+        if area >= min_area * np.prod(image.shape[:2]) and area <= max_area * np.prod(image.shape[:2]):  # and hierarchy[0][jv][3]==-1 :
             # print(c[0][0][1])
             found_polygons_early.append(np.array([[point] for point in polygon.exterior.coords], dtype=np.int32))
         jv += 1