fix sast process

ppocr/data/imaug/sast_process.py

@@ -24,11 +24,11 @@ __all__ = ['SASTProcessTrain']
 
 class SASTProcessTrain(object):
     def __init__(self,
-                 image_shape = [512, 512],
-                 min_crop_size = 24,
-                 min_crop_side_ratio = 0.3,
-                 min_text_size = 10,
-                 max_text_size = 512,
+                 image_shape=[512, 512],
+                 min_crop_size=24,
+                 min_crop_side_ratio=0.3,
+                 min_text_size=10,
+                 max_text_size=512,
                  **kwargs):
         self.input_size = image_shape[1]
         self.min_crop_size = min_crop_size
@@ -42,12 +42,10 @@ class SASTProcessTrain(object):
         :param poly:
         :return:
         """
-        edge = [
-            (poly[1][0] - poly[0][0]) * (poly[1][1] + poly[0][1]),
-            (poly[2][0] - poly[1][0]) * (poly[2][1] + poly[1][1]),
-            (poly[3][0] - poly[2][0]) * (poly[3][1] + poly[2][1]),
-            (poly[0][0] - poly[3][0]) * (poly[0][1] + poly[3][1])
-        ]
+        edge = [(poly[1][0] - poly[0][0]) * (poly[1][1] + poly[0][1]),
+                (poly[2][0] - poly[1][0]) * (poly[2][1] + poly[1][1]),
+                (poly[3][0] - poly[2][0]) * (poly[3][1] + poly[2][1]),
+                (poly[0][0] - poly[3][0]) * (poly[0][1] + poly[3][1])]
         return np.sum(edge) / 2.
 
     def gen_quad_from_poly(self, poly):
@@ -57,7 +55,8 @@ class SASTProcessTrain(object):
         point_num = poly.shape[0]
         min_area_quad = np.zeros((4, 2), dtype=np.float32)
         if True:
-            rect = cv2.minAreaRect(poly.astype(np.int32))  # (center (x,y), (width, height), angle of rotation)
+            rect = cv2.minAreaRect(poly.astype(
+                np.int32))  # (center (x,y), (width, height), angle of rotation)
             center_point = rect[0]
             box = np.array(cv2.boxPoints(rect))
 
@@ -102,23 +101,33 @@ class SASTProcessTrain(object):
             if p_area > 0:
                 if tag == False:
                     print('poly in wrong direction')
-                    tag = True # reversed cases should be ignore
-                poly = poly[(0, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1), :]
+                    tag = True  # reversed cases should be ignore
+                poly = poly[(0, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2,
+                             1), :]
                 quad = quad[(0, 3, 2, 1), :]
 
-            len_w = np.linalg.norm(quad[0] - quad[1]) + np.linalg.norm(quad[3] - quad[2])
-            len_h = np.linalg.norm(quad[0] - quad[3]) + np.linalg.norm(quad[1] - quad[2])
+            len_w = np.linalg.norm(quad[0] - quad[1]) + np.linalg.norm(quad[3] -
+                                                                       quad[2])
+            len_h = np.linalg.norm(quad[0] - quad[3]) + np.linalg.norm(quad[1] -
+                                                                       quad[2])
             hv_tag = 1
-        
-            if len_w * 2.0 <  len_h:
+
+            if len_w * 2.0 < len_h:
                 hv_tag = 0
 
             validated_polys.append(poly)
             validated_tags.append(tag)
             hv_tags.append(hv_tag)
-        return np.array(validated_polys), np.array(validated_tags), np.array(hv_tags)
+        return np.array(validated_polys), np.array(validated_tags), np.array(
+            hv_tags)
 
-    def crop_area(self, im, polys, tags, hv_tags, crop_background=False, max_tries=25):
+    def crop_area(self,
+                  im,
+                  polys,
+                  tags,
+                  hv_tags,
+                  crop_background=False,
+                  max_tries=25):
         """
         make random crop from the input image
         :param im:
@@ -137,10 +146,10 @@ class SASTProcessTrain(object):
             poly = np.round(poly, decimals=0).astype(np.int32)
             minx = np.min(poly[:, 0])
             maxx = np.max(poly[:, 0])
-            w_array[minx + pad_w: maxx + pad_w] = 1
+            w_array[minx + pad_w:maxx + pad_w] = 1
             miny = np.min(poly[:, 1])
             maxy = np.max(poly[:, 1])
-            h_array[miny + pad_h: maxy + pad_h] = 1
+            h_array[miny + pad_h:maxy + pad_h] = 1
         # ensure the cropped area not across a text
         h_axis = np.where(h_array == 0)[0]
         w_axis = np.where(w_array == 0)[0]
@@ -166,17 +175,18 @@ class SASTProcessTrain(object):
             if polys.shape[0] != 0:
                 poly_axis_in_area = (polys[:, :, 0] >= xmin) & (polys[:, :, 0] <= xmax) \
                                     & (polys[:, :, 1] >= ymin) & (polys[:, :, 1] <= ymax)
-                selected_polys = np.where(np.sum(poly_axis_in_area, axis=1) == 4)[0]
+                selected_polys = np.where(
+                    np.sum(poly_axis_in_area, axis=1) == 4)[0]
             else:
                 selected_polys = []
             if len(selected_polys) == 0:
                 # no text in this area
                 if crop_background:
                     return im[ymin : ymax + 1, xmin : xmax + 1, :], \
-                        polys[selected_polys], tags[selected_polys], hv_tags[selected_polys], txts
+                        polys[selected_polys], tags[selected_polys], hv_tags[selected_polys]
                 else:
                     continue
-            im = im[ymin: ymax + 1, xmin: xmax + 1, :]
+            im = im[ymin:ymax + 1, xmin:xmax + 1, :]
             polys = polys[selected_polys]
             tags = tags[selected_polys]
             hv_tags = hv_tags[selected_polys]
@@ -192,18 +202,28 @@ class SASTProcessTrain(object):
         width_list = []
         height_list = []
         for quad in poly_quads:
-            quad_w = (np.linalg.norm(quad[0] - quad[1]) + np.linalg.norm(quad[2] - quad[3])) / 2.0
-            quad_h = (np.linalg.norm(quad[0] - quad[3]) + np.linalg.norm(quad[2] - quad[1])) / 2.0
+            quad_w = (np.linalg.norm(quad[0] - quad[1]) +
+                      np.linalg.norm(quad[2] - quad[3])) / 2.0
+            quad_h = (np.linalg.norm(quad[0] - quad[3]) +
+                      np.linalg.norm(quad[2] - quad[1])) / 2.0
             width_list.append(quad_w)
             height_list.append(quad_h)
-        norm_width = max(sum(width_list) / (len(width_list) +  1e-6), 1.0)
+        norm_width = max(sum(width_list) / (len(width_list) + 1e-6), 1.0)
         average_height = max(sum(height_list) / (len(height_list) + 1e-6), 1.0)
 
         for quad in poly_quads:
-            direct_vector_full = ((quad[1] + quad[2]) - (quad[0] + quad[3])) / 2.0
-            direct_vector = direct_vector_full / (np.linalg.norm(direct_vector_full) + 1e-6) * norm_width
-            direction_label = tuple(map(float, [direct_vector[0], direct_vector[1], 1.0 / (average_height + 1e-6)]))
-            cv2.fillPoly(direction_map, quad.round().astype(np.int32)[np.newaxis, :, :], direction_label)
+            direct_vector_full = (
+                (quad[1] + quad[2]) - (quad[0] + quad[3])) / 2.0
+            direct_vector = direct_vector_full / (
+                np.linalg.norm(direct_vector_full) + 1e-6) * norm_width
+            direction_label = tuple(
+                map(float, [
+                    direct_vector[0], direct_vector[1], 1.0 / (average_height +
+                                                               1e-6)
+                ]))
+            cv2.fillPoly(direction_map,
+                         quad.round().astype(np.int32)[np.newaxis, :, :],
+                         direction_label)
         return direction_map
 
     def calculate_average_height(self, poly_quads):
@@ -211,13 +231,19 @@ class SASTProcessTrain(object):
         """
         height_list = []
         for quad in poly_quads:
-            quad_h = (np.linalg.norm(quad[0] - quad[3]) + np.linalg.norm(quad[2] - quad[1])) / 2.0
+            quad_h = (np.linalg.norm(quad[0] - quad[3]) +
+                      np.linalg.norm(quad[2] - quad[1])) / 2.0
             height_list.append(quad_h)
         average_height = max(sum(height_list) / len(height_list), 1.0)
         return average_height
 
-    def generate_tcl_label(self, hw, polys, tags, ds_ratio,
-                            tcl_ratio=0.3, shrink_ratio_of_width=0.15):
+    def generate_tcl_label(self,
+                           hw,
+                           polys,
+                           tags,
+                           ds_ratio,
+                           tcl_ratio=0.3,
+                           shrink_ratio_of_width=0.15):
         """
         Generate polygon.
         """
@@ -225,21 +251,30 @@ class SASTProcessTrain(object):
         h, w = int(h * ds_ratio), int(w * ds_ratio)
         polys = polys * ds_ratio
 
-        score_map = np.zeros((h, w,), dtype=np.float32)
+        score_map = np.zeros(
+            (
+                h,
+                w, ), dtype=np.float32)
         tbo_map = np.zeros((h, w, 5), dtype=np.float32)
-        training_mask = np.ones((h, w,), dtype=np.float32)
-        direction_map = np.ones((h, w, 3)) * np.array([0, 0, 1]).reshape([1, 1, 3]).astype(np.float32)
+        training_mask = np.ones(
+            (
+                h,
+                w, ), dtype=np.float32)
+        direction_map = np.ones((h, w, 3)) * np.array([0, 0, 1]).reshape(
+            [1, 1, 3]).astype(np.float32)
 
         for poly_idx, poly_tag in enumerate(zip(polys, tags)):
-            poly = poly_tag[0] 
+            poly = poly_tag[0]
             tag = poly_tag[1]
 
             # generate min_area_quad
             min_area_quad, center_point = self.gen_min_area_quad_from_poly(poly)
-            min_area_quad_h = 0.5 * (np.linalg.norm(min_area_quad[0] - min_area_quad[3]) +
-                                    np.linalg.norm(min_area_quad[1] - min_area_quad[2]))
-            min_area_quad_w = 0.5 * (np.linalg.norm(min_area_quad[0] - min_area_quad[1]) +
-                                    np.linalg.norm(min_area_quad[2] - min_area_quad[3]))
+            min_area_quad_h = 0.5 * (
+                np.linalg.norm(min_area_quad[0] - min_area_quad[3]) +
+                np.linalg.norm(min_area_quad[1] - min_area_quad[2]))
+            min_area_quad_w = 0.5 * (
+                np.linalg.norm(min_area_quad[0] - min_area_quad[1]) +
+                np.linalg.norm(min_area_quad[2] - min_area_quad[3]))
 
             if min(min_area_quad_h, min_area_quad_w) < self.min_text_size * ds_ratio \
                 or min(min_area_quad_h, min_area_quad_w) > self.max_text_size * ds_ratio:
@@ -247,25 +282,37 @@ class SASTProcessTrain(object):
 
             if tag:
                 # continue
-                cv2.fillPoly(training_mask, poly.astype(np.int32)[np.newaxis, :, :], 0.15)
+                cv2.fillPoly(training_mask,
+                             poly.astype(np.int32)[np.newaxis, :, :], 0.15)
             else:
                 tcl_poly = self.poly2tcl(poly, tcl_ratio)
                 tcl_quads = self.poly2quads(tcl_poly)
                 poly_quads = self.poly2quads(poly)
                 # stcl map
-                stcl_quads, quad_index = self.shrink_poly_along_width(tcl_quads, shrink_ratio_of_width=shrink_ratio_of_width,
-                                                                expand_height_ratio=1.0 / tcl_ratio)
+                stcl_quads, quad_index = self.shrink_poly_along_width(
+                    tcl_quads,
+                    shrink_ratio_of_width=shrink_ratio_of_width,
+                    expand_height_ratio=1.0 / tcl_ratio)
                 # generate tcl map
-                cv2.fillPoly(score_map, np.round(stcl_quads).astype(np.int32), 1.0)
+                cv2.fillPoly(score_map,
+                             np.round(stcl_quads).astype(np.int32), 1.0)
 
                 # generate tbo map
                 for idx, quad in enumerate(stcl_quads):
                     quad_mask = np.zeros((h, w), dtype=np.float32)
-                    quad_mask = cv2.fillPoly(quad_mask, np.round(quad[np.newaxis, :, :]).astype(np.int32), 1.0)
-                    tbo_map = self.gen_quad_tbo(poly_quads[quad_index[idx]], quad_mask, tbo_map)
+                    quad_mask = cv2.fillPoly(
+                        quad_mask,
+                        np.round(quad[np.newaxis, :, :]).astype(np.int32), 1.0)
+                    tbo_map = self.gen_quad_tbo(poly_quads[quad_index[idx]],
+                                                quad_mask, tbo_map)
         return score_map, tbo_map, training_mask
 
-    def generate_tvo_and_tco(self, hw, polys, tags, tcl_ratio=0.3, ds_ratio=0.25):
+    def generate_tvo_and_tco(self,
+                             hw,
+                             polys,
+                             tags,
+                             tcl_ratio=0.3,
+                             ds_ratio=0.25):
         """
         Generate tcl map, tvo map and tbo map.
         """
@@ -297,35 +344,44 @@ class SASTProcessTrain(object):
 
             # generate min_area_quad
             min_area_quad, center_point = self.gen_min_area_quad_from_poly(poly)
-            min_area_quad_h = 0.5 * (np.linalg.norm(min_area_quad[0] - min_area_quad[3]) +
-                                    np.linalg.norm(min_area_quad[1] - min_area_quad[2]))
-            min_area_quad_w = 0.5 * (np.linalg.norm(min_area_quad[0] - min_area_quad[1]) +
-                                    np.linalg.norm(min_area_quad[2] - min_area_quad[3]))
+            min_area_quad_h = 0.5 * (
+                np.linalg.norm(min_area_quad[0] - min_area_quad[3]) +
+                np.linalg.norm(min_area_quad[1] - min_area_quad[2]))
+            min_area_quad_w = 0.5 * (
+                np.linalg.norm(min_area_quad[0] - min_area_quad[1]) +
+                np.linalg.norm(min_area_quad[2] - min_area_quad[3]))
 
             # generate tcl map and text, 128 * 128
             tcl_poly = self.poly2tcl(poly, tcl_ratio)
 
             # generate poly_tv_xy_map
             for idx in range(4):
-                cv2.fillPoly(poly_tv_xy_map[2 * idx],
-                            np.round(tcl_poly[np.newaxis, :, :]).astype(np.int32),
-                            float(min(max(min_area_quad[idx, 0], 0), w)))
-                cv2.fillPoly(poly_tv_xy_map[2 * idx + 1],
-                            np.round(tcl_poly[np.newaxis, :, :]).astype(np.int32),
-                            float(min(max(min_area_quad[idx, 1], 0), h)))
+                cv2.fillPoly(
+                    poly_tv_xy_map[2 * idx],
+                    np.round(tcl_poly[np.newaxis, :, :]).astype(np.int32),
+                    float(min(max(min_area_quad[idx, 0], 0), w)))
+                cv2.fillPoly(
+                    poly_tv_xy_map[2 * idx + 1],
+                    np.round(tcl_poly[np.newaxis, :, :]).astype(np.int32),
+                    float(min(max(min_area_quad[idx, 1], 0), h)))
 
             # generate poly_tc_xy_map
             for idx in range(2):
-                cv2.fillPoly(poly_tc_xy_map[idx],
-                            np.round(tcl_poly[np.newaxis, :, :]).astype(np.int32), float(center_point[idx]))
+                cv2.fillPoly(
+                    poly_tc_xy_map[idx],
+                    np.round(tcl_poly[np.newaxis, :, :]).astype(np.int32),
+                    float(center_point[idx]))
 
             # generate poly_short_edge_map
-            cv2.fillPoly(poly_short_edge_map,
-                        np.round(tcl_poly[np.newaxis, :, :]).astype(np.int32),
-                        float(max(min(min_area_quad_h, min_area_quad_w), 1.0)))
+            cv2.fillPoly(
+                poly_short_edge_map,
+                np.round(tcl_poly[np.newaxis, :, :]).astype(np.int32),
+                float(max(min(min_area_quad_h, min_area_quad_w), 1.0)))
 
             # generate poly_mask and training_mask
-            cv2.fillPoly(poly_mask, np.round(tcl_poly[np.newaxis, :, :]).astype(np.int32), 1)
+            cv2.fillPoly(poly_mask,
+                         np.round(tcl_poly[np.newaxis, :, :]).astype(np.int32),
+                         1)
 
         tvo_map *= poly_mask
         tvo_map[:8] -= poly_tv_xy_map
@@ -356,7 +412,8 @@ class SASTProcessTrain(object):
         elif point_num > 4:
             vector_1 = poly[0] - poly[1]
             vector_2 = poly[1] - poly[2]
-            cos_theta = np.dot(vector_1, vector_2) / (np.linalg.norm(vector_1) * np.linalg.norm(vector_2) + 1e-6)
+            cos_theta = np.dot(vector_1, vector_2) / (
+                np.linalg.norm(vector_1) * np.linalg.norm(vector_2) + 1e-6)
             theta = np.arccos(np.round(cos_theta, decimals=4))
 
             if abs(theta) > (70 / 180 * math.pi):
@@ -374,7 +431,8 @@ class SASTProcessTrain(object):
             min_area_quad = poly
             center_point = np.sum(poly, axis=0) / 4
         else:
-            rect = cv2.minAreaRect(poly.astype(np.int32))  # (center (x,y), (width, height), angle of rotation)
+            rect = cv2.minAreaRect(poly.astype(
+                np.int32))  # (center (x,y), (width, height), angle of rotation)
             center_point = rect[0]
             box = np.array(cv2.boxPoints(rect))
 
@@ -394,16 +452,23 @@ class SASTProcessTrain(object):
 
         return min_area_quad, center_point
 
-    def shrink_quad_along_width(self, quad, begin_width_ratio=0., end_width_ratio=1.):
+    def shrink_quad_along_width(self,
+                                quad,
+                                begin_width_ratio=0.,
+                                end_width_ratio=1.):
         """
         Generate shrink_quad_along_width.
         """
-        ratio_pair = np.array([[begin_width_ratio], [end_width_ratio]], dtype=np.float32)
+        ratio_pair = np.array(
+            [[begin_width_ratio], [end_width_ratio]], dtype=np.float32)
         p0_1 = quad[0] + (quad[1] - quad[0]) * ratio_pair
         p3_2 = quad[3] + (quad[2] - quad[3]) * ratio_pair
         return np.array([p0_1[0], p0_1[1], p3_2[1], p3_2[0]])
 
-    def shrink_poly_along_width(self, quads, shrink_ratio_of_width, expand_height_ratio=1.0):
+    def shrink_poly_along_width(self,
+                                quads,
+                                shrink_ratio_of_width,
+                                expand_height_ratio=1.0):
         """
         shrink poly with given length.
         """
@@ -421,22 +486,28 @@ class SASTProcessTrain(object):
             upper_edge_list.append(upper_edge_len)
 
         # length of left edge and right edge.
-        left_length = np.linalg.norm(quads[0][0] - quads[0][3]) * expand_height_ratio
-        right_length = np.linalg.norm(quads[-1][1] - quads[-1][2]) * expand_height_ratio
+        left_length = np.linalg.norm(quads[0][0] - quads[0][
+            3]) * expand_height_ratio
+        right_length = np.linalg.norm(quads[-1][1] - quads[-1][
+            2]) * expand_height_ratio
 
-        shrink_length = min(left_length, right_length, sum(upper_edge_list)) * shrink_ratio_of_width
+        shrink_length = min(left_length, right_length,
+                            sum(upper_edge_list)) * shrink_ratio_of_width
         # shrinking length
         upper_len_left = shrink_length
         upper_len_right = sum(upper_edge_list) - shrink_length
 
         left_idx, left_ratio = get_cut_info(upper_edge_list, upper_len_left)
-        left_quad = self.shrink_quad_along_width(quads[left_idx], begin_width_ratio=left_ratio, end_width_ratio=1)
+        left_quad = self.shrink_quad_along_width(
+            quads[left_idx], begin_width_ratio=left_ratio, end_width_ratio=1)
         right_idx, right_ratio = get_cut_info(upper_edge_list, upper_len_right)
-        right_quad = self.shrink_quad_along_width(quads[right_idx], begin_width_ratio=0, end_width_ratio=right_ratio)
-        
+        right_quad = self.shrink_quad_along_width(
+            quads[right_idx], begin_width_ratio=0, end_width_ratio=right_ratio)
+
         out_quad_list = []
         if left_idx == right_idx:
-            out_quad_list.append([left_quad[0], right_quad[1], right_quad[2], left_quad[3]])
+            out_quad_list.append(
+                [left_quad[0], right_quad[1], right_quad[2], left_quad[3]])
         else:
             out_quad_list.append(left_quad)
             for idx in range(left_idx + 1, right_idx):
@@ -500,7 +571,8 @@ class SASTProcessTrain(object):
         """
         Generate center line by poly clock-wise point. (4, 2)
         """
-        ratio_pair = np.array([[0.5 - ratio / 2], [0.5 + ratio / 2]], dtype=np.float32)
+        ratio_pair = np.array(
+            [[0.5 - ratio / 2], [0.5 + ratio / 2]], dtype=np.float32)
         p0_3 = poly[0] + (poly[3] - poly[0]) * ratio_pair
         p1_2 = poly[1] + (poly[2] - poly[1]) * ratio_pair
         return np.array([p0_3[0], p1_2[0], p1_2[1], p0_3[1]])
@@ -509,12 +581,14 @@ class SASTProcessTrain(object):
         """
         Generate center line by poly clock-wise point.
         """
-        ratio_pair = np.array([[0.5 - ratio / 2], [0.5 + ratio / 2]], dtype=np.float32)
+        ratio_pair = np.array(
+            [[0.5 - ratio / 2], [0.5 + ratio / 2]], dtype=np.float32)
         tcl_poly = np.zeros_like(poly)
         point_num = poly.shape[0]
 
         for idx in range(point_num // 2):
-            point_pair = poly[idx] + (poly[point_num - 1 - idx] - poly[idx]) * ratio_pair
+            point_pair = poly[idx] + (poly[point_num - 1 - idx] - poly[idx]
+                                      ) * ratio_pair
             tcl_poly[idx] = point_pair[0]
             tcl_poly[point_num - 1 - idx] = point_pair[1]
         return tcl_poly
@@ -527,8 +601,10 @@ class SASTProcessTrain(object):
         up_line = self.line_cross_two_point(quad[0], quad[1])
         lower_line = self.line_cross_two_point(quad[3], quad[2])
 
-        quad_h = 0.5 * (np.linalg.norm(quad[0] - quad[3]) + np.linalg.norm(quad[1] - quad[2]))
-        quad_w = 0.5 * (np.linalg.norm(quad[0] - quad[1]) + np.linalg.norm(quad[2] - quad[3]))
+        quad_h = 0.5 * (np.linalg.norm(quad[0] - quad[3]) +
+                        np.linalg.norm(quad[1] - quad[2]))
+        quad_w = 0.5 * (np.linalg.norm(quad[0] - quad[1]) +
+                        np.linalg.norm(quad[2] - quad[3]))
 
         # average angle of left and right line.
         angle = self.average_angle(quad)
@@ -565,7 +641,8 @@ class SASTProcessTrain(object):
         quad_num = point_num // 2 - 1
         for idx in range(quad_num):
             # reshape and adjust to clock-wise
-            quad_list.append((np.array(point_pair_list)[[idx, idx + 1]]).reshape(4, 2)[[0, 2, 3, 1]])
+            quad_list.append((np.array(point_pair_list)[[idx, idx + 1]]
+                              ).reshape(4, 2)[[0, 2, 3, 1]])
 
         return np.array(quad_list)
 
@@ -579,7 +656,8 @@ class SASTProcessTrain(object):
             return None
 
         h, w, _ = im.shape
-        text_polys, text_tags, hv_tags = self.check_and_validate_polys(text_polys, text_tags, (h, w))
+        text_polys, text_tags, hv_tags = self.check_and_validate_polys(
+            text_polys, text_tags, (h, w))
 
         if text_polys.shape[0] == 0:
             return None
@@ -591,7 +669,7 @@ class SASTProcessTrain(object):
         if np.random.rand() < 0.5:
             asp_scale = 1.0 / asp_scale
         asp_scale = math.sqrt(asp_scale)
-        
+
         asp_wx = asp_scale
         asp_hy = 1.0 / asp_scale
         im = cv2.resize(im, dsize=None, fx=asp_wx, fy=asp_hy)
@@ -610,7 +688,7 @@ class SASTProcessTrain(object):
         #no background
         im, text_polys, text_tags, hv_tags = self.crop_area(im, \
             text_polys, text_tags, hv_tags, crop_background=False)
-            
+
         if text_polys.shape[0] == 0:
             return None
         #continue for all ignore case
@@ -621,17 +699,18 @@ class SASTProcessTrain(object):
             return None
         #resize image
         std_ratio = float(self.input_size) / max(new_w, new_h)
-        rand_scales = np.array([0.25, 0.375, 0.5, 0.625, 0.75, 0.875, 1.0, 1.0, 1.0, 1.0, 1.0])
+        rand_scales = np.array(
+            [0.25, 0.375, 0.5, 0.625, 0.75, 0.875, 1.0, 1.0, 1.0, 1.0, 1.0])
         rz_scale = std_ratio * np.random.choice(rand_scales)
         im = cv2.resize(im, dsize=None, fx=rz_scale, fy=rz_scale)
         text_polys[:, :, 0] *= rz_scale
         text_polys[:, :, 1] *= rz_scale
-        
+
         #add gaussian blur
         if np.random.rand() < 0.1 * 0.5:
             ks = np.random.permutation(5)[0] + 1
-            ks = int(ks/2)*2 + 1
-            im =  cv2.GaussianBlur(im, ksize=(ks, ks), sigmaX=0, sigmaY=0)
+            ks = int(ks / 2) * 2 + 1
+            im = cv2.GaussianBlur(im, ksize=(ks, ks), sigmaX=0, sigmaY=0)
         #add brighter
         if np.random.rand() < 0.1 * 0.5:
             im = im * (1.0 + np.random.rand() * 0.5)
@@ -640,13 +719,14 @@ class SASTProcessTrain(object):
         if np.random.rand() < 0.1 * 0.5:
             im = im * (1.0 - np.random.rand() * 0.5)
             im = np.clip(im, 0.0, 255.0)
-        
+
         # Padding the im to [input_size, input_size]
         new_h, new_w, _ = im.shape
         if min(new_w, new_h) < self.input_size * 0.5:
             return None
 
-        im_padded = np.ones((self.input_size, self.input_size, 3), dtype=np.float32)
+        im_padded = np.ones(
+            (self.input_size, self.input_size, 3), dtype=np.float32)
         im_padded[:, :, 2] = 0.485 * 255
         im_padded[:, :, 1] = 0.456 * 255
         im_padded[:, :, 0] = 0.406 * 255
@@ -661,24 +741,29 @@ class SASTProcessTrain(object):
             sw = int(np.random.rand() * del_w)
 
         # Padding
-        im_padded[sh: sh + new_h, sw: sw + new_w, :] = im.copy()
+        im_padded[sh:sh + new_h, sw:sw + new_w, :] = im.copy()
         text_polys[:, :, 0] += sw
         text_polys[:, :, 1] += sh
 
-        score_map, border_map, training_mask = self.generate_tcl_label((self.input_size, self.input_size), 
-                            text_polys, text_tags, 0.25)
-        
+        score_map, border_map, training_mask = self.generate_tcl_label(
+            (self.input_size, self.input_size), text_polys, text_tags, 0.25)
+
         # SAST head
-        tvo_map, tco_map = self.generate_tvo_and_tco((self.input_size, self.input_size), text_polys, text_tags,  tcl_ratio=0.3, ds_ratio=0.25)
+        tvo_map, tco_map = self.generate_tvo_and_tco(
+            (self.input_size, self.input_size),
+            text_polys,
+            text_tags,
+            tcl_ratio=0.3,
+            ds_ratio=0.25)
         # print("test--------tvo_map shape:", tvo_map.shape)
 
         im_padded[:, :, 2] -= 0.485 * 255
         im_padded[:, :, 1] -= 0.456 * 255
         im_padded[:, :, 0] -= 0.406 * 255
-        im_padded[:, :, 2] /= (255.0 * 0.229) 
-        im_padded[:, :, 1] /= (255.0 * 0.224) 
-        im_padded[:, :, 0] /= (255.0 * 0.225) 
-        im_padded = im_padded.transpose((2, 0, 1))        
+        im_padded[:, :, 2] /= (255.0 * 0.229)
+        im_padded[:, :, 1] /= (255.0 * 0.224)
+        im_padded[:, :, 0] /= (255.0 * 0.225)
+        im_padded = im_padded.transpose((2, 0, 1))
 
         data['image'] = im_padded[::-1, :, :]
         data['score_map'] = score_map[np.newaxis, :, :]
@@ -686,4 +771,4 @@ class SASTProcessTrain(object):
         data['training_mask'] = training_mask[np.newaxis, :, :]
         data['tvo_map'] = tvo_map.transpose((2, 0, 1))
         data['tco_map'] = tco_map.transpose((2, 0, 1))
-        return data
\ No newline at end of file
+        return data