add resize class and lock seed

configs/det/det_mv3_db.yml

@@ -76,10 +76,12 @@ Train:
             - { 'type': Fliplr, 'args': { 'p': 0.5 } }
             - { 'type': Affine, 'args': { 'rotate': [-10, 10] } }
             - { 'type': Resize, 'args': { 'size': [0.5, 3] } }
-      - EastRandomCropData:
+      - Resize:
           size: [640, 640]
-          max_tries: 50
-          keep_ratio: true
+#      - EastRandomCropData:
+#          size: [640, 640]
+#          max_tries: 50
+#          keep_ratio: true
       - MakeBorderMap:
           shrink_ratio: 0.4
           thresh_min: 0.3

ppocr/data/imaug/operators.py

@@ -112,6 +112,34 @@ class KeepKeys(object):
         return data_list
 
 
+class Resize(object):
+    def __init__(self, size=(640, 640), **kwargs):
+        self.size = size
+
+    def resize_image(self, img):
+        resize_h, resize_w = self.size
+        ori_h, ori_w = img.shape[:2]  # (h, w, c)
+        ratio_h = float(resize_h) / ori_h
+        ratio_w = float(resize_w) / ori_w
+        img = cv2.resize(img, (int(resize_w), int(resize_h)))
+        return img, [ratio_h, ratio_w]
+
+    def __call__(self, data):
+        img = data['image']
+        text_polys = data['polys']
+
+        img_resize, [ratio_h, ratio_w] = self.resize_image(img)
+        new_boxes = []
+        for box in text_polys:
+            new_box = []
+            for cord in box:
+                new_box.append([cord[0] * ratio_w, cord[1] * ratio_h])
+            new_boxes.append(new_box)
+        data['image'] = img_resize
+        data['polys'] = np.array(new_boxes, dtype=np.float32)
+        return data
+
+
 class DetResizeForTest(object):
     def __init__(self, **kwargs):
         super(DetResizeForTest, self).__init__()
@@ -183,7 +211,7 @@ class DetResizeForTest(object):
             else:
                 ratio = 1.
         elif self.limit_type == 'resize_long':
-            ratio = float(limit_side_len) / max(h,w)
+            ratio = float(limit_side_len) / max(h, w)
         else:
             raise Exception('not support limit type, image ')
         resize_h = int(h * ratio)