fix: change how images are rotated

tools/infer.py

@@ -8,7 +8,7 @@
 
     Please contact the author Alexandre Delplanque (alexandre.delplanque@uliege.be) for any questions.
 
-    Last modification: April 28, 2023
+    Last modification: March 14, 2024
     """
 __author__ = "Alexandre Delplanque"
 __license__ = "CC BY-NC-SA 4.0"
@@ -28,7 +28,7 @@
 from torch.utils.data import DataLoader
 from PIL import Image
 
-from animaloc.data.transforms import DownSample
+from animaloc.data.transforms import DownSample, Rotate90
 from animaloc.models import LossWrapper, HerdNet
 from animaloc.eval import HerdNetStitcher, HerdNetEvaluator
 from animaloc.eval.metrics import PointsMetrics
@@ -61,7 +61,7 @@
 parser.add_argument('-pf', type=int, default=10,
     help='print frequence. Defaults to 10.')
 parser.add_argument('-rot', type=int, default=0,
-    help='number of degrees to rotate the images (counter clockwise). Defaults to 0.')
+    help='number of times to rotate by 90 degrees. Defaults to 0.')
 
 args = parser.parse_args()
 
@@ -89,16 +89,18 @@ def main():
     n = len(img_names)
     df = pandas.DataFrame(data={'images': img_names, 'x': [0]*n, 'y': [0]*n, 'labels': [1]*n})
 
-    albu_transforms = []
+    end_transforms = []
     if args.rot != 0:
-        albu_transforms.append(A.Rotate(limit=(args.rot,args.rot), p=1))
-    albu_transforms.append(A.Normalize(mean=img_mean, std=img_std))
+        end_transforms.append(Rotate90(k=args.rot))
+    end_transforms.append(DownSample(down_ratio = 2, anno_type = 'point'))
+
+    albu_transforms = [A.Normalize(mean=img_mean, std=img_std)]
 
     dataset = CSVDataset(
         csv_file = df,
         root_dir = args.root,
         albu_transforms = albu_transforms,
-        end_transforms = [DownSample(down_ratio = 2, anno_type = 'point')]
+        end_transforms = end_transforms
         )
 
     dataloader = DataLoader(dataset, batch_size=1, shuffle=False,
@@ -156,7 +158,8 @@ def main():
     for img_name in img_names:
         img = Image.open(os.path.join(args.root, img_name))
         if args.rot != 0:
-            img = img.rotate(args.rot, expand=True)
+            rot = args.rot * 90
+            img = img.rotate(rot, expand=True)
         img_cpy = img.copy()
         pts = list(detections[detections['images']==img_name][['y','x']].to_records(index=False))
         pts = [(y, x) for y, x in pts]