`ultralytics 8.0.50` AMP check and YOLOv5u YAMLs (#1263)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Troy <wudashuo@vip.qq.com>
Co-authored-by: Yonghye Kwon <developer.0hye@gmail.com>
Co-authored-by: Ayush Chaurasia <ayush.chaurarsia@gmail.com>
Co-authored-by: Laughing <61612323+Laughing-q@users.noreply.github.com>
Co-authored-by: Huijae Lee <46982469+ZeroAct@users.noreply.github.com>

docs/cfg.md

@@ -55,7 +55,7 @@ include train, val, and predict.
 | mode   | 'train'  | YOLO mode, i.e. train, val, predict, or export                                                |
 | resume | False    | resume training from last checkpoint or custom checkpoint if passed as resume=path/to/best.pt |
 | model  | null     | path to model file, i.e. yolov8n.pt, yolov8n.yaml                                             |
-| data   | null     | path to data file, i.e. i.e. coco128.yaml                                                     |
+| data   | null     | path to data file, i.e. coco128.yaml                                                          |
 
 ### Training
 
@@ -69,7 +69,7 @@ task.
 | Key             | Value  | Description                                                                    |
 |-----------------|--------|--------------------------------------------------------------------------------|
 | model           | null   | path to model file, i.e. yolov8n.pt, yolov8n.yaml                              |
-| data            | null   | path to data file, i.e. i.e. coco128.yaml                                      |
+| data            | null   | path to data file, i.e. coco128.yaml                                           |
 | epochs          | 100    | number of epochs to train for                                                  |
 | patience        | 50     | epochs to wait for no observable improvement for early stopping of training    |
 | batch           | 16     | number of images per batch (-1 for AutoBatch)                                  |

docs/predict.md

@@ -47,7 +47,7 @@ source can be used as a stream and the model argument required for that source.
 | CSV        |         | `'sources.csv'`                            | `str`, `Path`  | RTSP, RTMP, HTTP |         
 | video      | ✓ | `'vid.mp4'`                                | `str`, `Path`  |                  |
 | directory  | ✓ | `'path/'`                                  | `str`, `Path`  |                  |
-| glob       | ✓ | `path/*.jpg'`                              | `str`          | Use `*` operator |
+| glob       | ✓ | `'path/*.jpg'`                             | `str`          | Use `*` operator |
 | YouTube    | ✓ | `'https://youtu.be/Zgi9g1ksQHc'`           | `str`          |                  |
 | stream     | ✓ | `'rtsp://example.com/media.mp4'`           | `str`          | RTSP, RTMP, HTTP |
 

tests/test_python.py

@@ -49,6 +49,8 @@ def test_predict_dir():
 
 def test_predict_img():
     model = YOLO(MODEL)
+    seg_model = YOLO('yolov8n-seg.pt')
+    cls_model = YOLO('yolov8n-cls.pt')
     im = cv2.imread(str(SOURCE))
     assert len(model(source=Image.open(SOURCE), save=True, verbose=True)) == 1  # PIL
     assert len(model(source=im, save=True, save_txt=True)) == 1  # ndarray
@@ -64,6 +66,18 @@ def test_predict_img():
         np.zeros((320, 640, 3))]  # numpy
     assert len(model(batch)) == len(batch)  # multiple sources in a batch
 
+    # Test tensor inference
+    im = cv2.imread(str(SOURCE))  # OpenCV
+    t = cv2.resize(im, (32, 32))
+    t = torch.from_numpy(t.transpose((2, 0, 1)))
+    t = torch.stack([t, t, t, t])
+    results = model(t)
+    assert len(results) == t.shape[0]
+    results = seg_model(t)
+    assert len(results) == t.shape[0]
+    results = cls_model(t)
+    assert len(results) == t.shape[0]
+
 
 def test_predict_grey_and_4ch():
     model = YOLO(MODEL)
@@ -199,3 +213,6 @@ def test_result():
     res = model(SOURCE)
     res[0].plot()
     print(res[0].path)
+
+
+test_predict_img()

ultralytics/__init__.py

@@ -1,6 +1,6 @@
 # Ultralytics YOLO 🚀, GPL-3.0 license
 
-__version__ = '8.0.49'
+__version__ = '8.0.50'
 
 from ultralytics.yolo.engine.model import YOLO
 from ultralytics.yolo.utils.checks import check_yolo as checks

ultralytics/models/v5/yolov5l6u.yaml

@@ -0,0 +1,55 @@
+# Ultralytics YOLO 🚀, GPL-3.0 license
+
+# Parameters
+nc: 80  # number of classes
+depth_multiple: 1.0  # model depth multiple
+width_multiple: 1.0  # layer channel multiple
+
+# YOLOv5 v6.0 backbone
+backbone:
+  # [from, number, module, args]
+  [[-1, 1, Conv, [64, 6, 2, 2]],  # 0-P1/2
+   [-1, 1, Conv, [128, 3, 2]],  # 1-P2/4
+   [-1, 3, C3, [128]],
+   [-1, 1, Conv, [256, 3, 2]],  # 3-P3/8
+   [-1, 6, C3, [256]],
+   [-1, 1, Conv, [512, 3, 2]],  # 5-P4/16
+   [-1, 9, C3, [512]],
+   [-1, 1, Conv, [768, 3, 2]],  # 7-P5/32
+   [-1, 3, C3, [768]],
+   [-1, 1, Conv, [1024, 3, 2]],  # 9-P6/64
+   [-1, 3, C3, [1024]],
+   [-1, 1, SPPF, [1024, 5]],  # 11
+  ]
+
+# YOLOv5 v6.0 head
+head:
+  [[-1, 1, Conv, [768, 1, 1]],
+   [-1, 1, nn.Upsample, [None, 2, 'nearest']],
+   [[-1, 8], 1, Concat, [1]],  # cat backbone P5
+   [-1, 3, C3, [768, False]],  # 15
+
+   [-1, 1, Conv, [512, 1, 1]],
+   [-1, 1, nn.Upsample, [None, 2, 'nearest']],
+   [[-1, 6], 1, Concat, [1]],  # cat backbone P4
+   [-1, 3, C3, [512, False]],  # 19
+
+   [-1, 1, Conv, [256, 1, 1]],
+   [-1, 1, nn.Upsample, [None, 2, 'nearest']],
+   [[-1, 4], 1, Concat, [1]],  # cat backbone P3
+   [-1, 3, C3, [256, False]],  # 23 (P3/8-small)
+
+   [-1, 1, Conv, [256, 3, 2]],
+   [[-1, 20], 1, Concat, [1]],  # cat head P4
+   [-1, 3, C3, [512, False]],  # 26 (P4/16-medium)
+
+   [-1, 1, Conv, [512, 3, 2]],
+   [[-1, 16], 1, Concat, [1]],  # cat head P5
+   [-1, 3, C3, [768, False]],  # 29 (P5/32-large)
+
+   [-1, 1, Conv, [768, 3, 2]],
+   [[-1, 12], 1, Concat, [1]],  # cat head P6
+   [-1, 3, C3, [1024, False]],  # 32 (P6/64-xlarge)
+
+   [[23, 26, 29, 32], 1, Detect, [nc]],  # Detect(P3, P4, P5, P6)
+  ]

ultralytics/models/v5/yolov5m6u.yaml

@@ -0,0 +1,55 @@
+# Ultralytics YOLO 🚀, GPL-3.0 license
+
+# Parameters
+nc: 80  # number of classes
+depth_multiple: 0.67  # model depth multiple
+width_multiple: 0.75  # layer channel multiple
+
+# YOLOv5 v6.0 backbone
+backbone:
+  # [from, number, module, args]
+  [[-1, 1, Conv, [64, 6, 2, 2]],  # 0-P1/2
+   [-1, 1, Conv, [128, 3, 2]],  # 1-P2/4
+   [-1, 3, C3, [128]],
+   [-1, 1, Conv, [256, 3, 2]],  # 3-P3/8
+   [-1, 6, C3, [256]],
+   [-1, 1, Conv, [512, 3, 2]],  # 5-P4/16
+   [-1, 9, C3, [512]],
+   [-1, 1, Conv, [768, 3, 2]],  # 7-P5/32
+   [-1, 3, C3, [768]],
+   [-1, 1, Conv, [1024, 3, 2]],  # 9-P6/64
+   [-1, 3, C3, [1024]],
+   [-1, 1, SPPF, [1024, 5]],  # 11
+  ]
+
+# YOLOv5 v6.0 head
+head:
+  [[-1, 1, Conv, [768, 1, 1]],
+   [-1, 1, nn.Upsample, [None, 2, 'nearest']],
+   [[-1, 8], 1, Concat, [1]],  # cat backbone P5
+   [-1, 3, C3, [768, False]],  # 15
+
+   [-1, 1, Conv, [512, 1, 1]],
+   [-1, 1, nn.Upsample, [None, 2, 'nearest']],
+   [[-1, 6], 1, Concat, [1]],  # cat backbone P4
+   [-1, 3, C3, [512, False]],  # 19
+
+   [-1, 1, Conv, [256, 1, 1]],
+   [-1, 1, nn.Upsample, [None, 2, 'nearest']],
+   [[-1, 4], 1, Concat, [1]],  # cat backbone P3
+   [-1, 3, C3, [256, False]],  # 23 (P3/8-small)
+
+   [-1, 1, Conv, [256, 3, 2]],
+   [[-1, 20], 1, Concat, [1]],  # cat head P4
+   [-1, 3, C3, [512, False]],  # 26 (P4/16-medium)
+
+   [-1, 1, Conv, [512, 3, 2]],
+   [[-1, 16], 1, Concat, [1]],  # cat head P5
+   [-1, 3, C3, [768, False]],  # 29 (P5/32-large)
+
+   [-1, 1, Conv, [768, 3, 2]],
+   [[-1, 12], 1, Concat, [1]],  # cat head P6
+   [-1, 3, C3, [1024, False]],  # 32 (P6/64-xlarge)
+
+   [[23, 26, 29, 32], 1, Detect, [nc]],  # Detect(P3, P4, P5, P6)
+  ]

ultralytics/models/v5/yolov5n6u.yaml

@@ -0,0 +1,55 @@
+# Ultralytics YOLO 🚀, GPL-3.0 license
+
+# Parameters
+nc: 80  # number of classes
+depth_multiple: 0.33  # model depth multiple
+width_multiple: 0.25  # layer channel multiple
+
+# YOLOv5 v6.0 backbone
+backbone:
+  # [from, number, module, args]
+  [[-1, 1, Conv, [64, 6, 2, 2]],  # 0-P1/2
+   [-1, 1, Conv, [128, 3, 2]],  # 1-P2/4
+   [-1, 3, C3, [128]],
+   [-1, 1, Conv, [256, 3, 2]],  # 3-P3/8
+   [-1, 6, C3, [256]],
+   [-1, 1, Conv, [512, 3, 2]],  # 5-P4/16
+   [-1, 9, C3, [512]],
+   [-1, 1, Conv, [768, 3, 2]],  # 7-P5/32
+   [-1, 3, C3, [768]],
+   [-1, 1, Conv, [1024, 3, 2]],  # 9-P6/64
+   [-1, 3, C3, [1024]],
+   [-1, 1, SPPF, [1024, 5]],  # 11
+  ]
+
+# YOLOv5 v6.0 head
+head:
+  [[-1, 1, Conv, [768, 1, 1]],
+   [-1, 1, nn.Upsample, [None, 2, 'nearest']],
+   [[-1, 8], 1, Concat, [1]],  # cat backbone P5
+   [-1, 3, C3, [768, False]],  # 15
+
+   [-1, 1, Conv, [512, 1, 1]],
+   [-1, 1, nn.Upsample, [None, 2, 'nearest']],
+   [[-1, 6], 1, Concat, [1]],  # cat backbone P4
+   [-1, 3, C3, [512, False]],  # 19
+
+   [-1, 1, Conv, [256, 1, 1]],
+   [-1, 1, nn.Upsample, [None, 2, 'nearest']],
+   [[-1, 4], 1, Concat, [1]],  # cat backbone P3
+   [-1, 3, C3, [256, False]],  # 23 (P3/8-small)
+
+   [-1, 1, Conv, [256, 3, 2]],
+   [[-1, 20], 1, Concat, [1]],  # cat head P4
+   [-1, 3, C3, [512, False]],  # 26 (P4/16-medium)
+
+   [-1, 1, Conv, [512, 3, 2]],
+   [[-1, 16], 1, Concat, [1]],  # cat head P5
+   [-1, 3, C3, [768, False]],  # 29 (P5/32-large)
+
+   [-1, 1, Conv, [768, 3, 2]],
+   [[-1, 12], 1, Concat, [1]],  # cat head P6
+   [-1, 3, C3, [1024, False]],  # 32 (P6/64-xlarge)
+
+   [[23, 26, 29, 32], 1, Detect, [nc]],  # Detect(P3, P4, P5, P6)
+  ]

ultralytics/models/v5/yolov5s6u.yaml

@@ -0,0 +1,55 @@
+# Ultralytics YOLO 🚀, GPL-3.0 license
+
+# Parameters
+nc: 80  # number of classes
+depth_multiple: 0.33  # model depth multiple
+width_multiple: 0.50  # layer channel multiple
+
+# YOLOv5 v6.0 backbone
+backbone:
+  # [from, number, module, args]
+  [[-1, 1, Conv, [64, 6, 2, 2]],  # 0-P1/2
+   [-1, 1, Conv, [128, 3, 2]],  # 1-P2/4
+   [-1, 3, C3, [128]],
+   [-1, 1, Conv, [256, 3, 2]],  # 3-P3/8
+   [-1, 6, C3, [256]],
+   [-1, 1, Conv, [512, 3, 2]],  # 5-P4/16
+   [-1, 9, C3, [512]],
+   [-1, 1, Conv, [768, 3, 2]],  # 7-P5/32
+   [-1, 3, C3, [768]],
+   [-1, 1, Conv, [1024, 3, 2]],  # 9-P6/64
+   [-1, 3, C3, [1024]],
+   [-1, 1, SPPF, [1024, 5]],  # 11
+  ]
+
+# YOLOv5 v6.0 head
+head:
+  [[-1, 1, Conv, [768, 1, 1]],
+   [-1, 1, nn.Upsample, [None, 2, 'nearest']],
+   [[-1, 8], 1, Concat, [1]],  # cat backbone P5
+   [-1, 3, C3, [768, False]],  # 15
+
+   [-1, 1, Conv, [512, 1, 1]],
+   [-1, 1, nn.Upsample, [None, 2, 'nearest']],
+   [[-1, 6], 1, Concat, [1]],  # cat backbone P4
+   [-1, 3, C3, [512, False]],  # 19
+
+   [-1, 1, Conv, [256, 1, 1]],
+   [-1, 1, nn.Upsample, [None, 2, 'nearest']],
+   [[-1, 4], 1, Concat, [1]],  # cat backbone P3
+   [-1, 3, C3, [256, False]],  # 23 (P3/8-small)
+
+   [-1, 1, Conv, [256, 3, 2]],
+   [[-1, 20], 1, Concat, [1]],  # cat head P4
+   [-1, 3, C3, [512, False]],  # 26 (P4/16-medium)
+
+   [-1, 1, Conv, [512, 3, 2]],
+   [[-1, 16], 1, Concat, [1]],  # cat head P5
+   [-1, 3, C3, [768, False]],  # 29 (P5/32-large)
+
+   [-1, 1, Conv, [768, 3, 2]],
+   [[-1, 12], 1, Concat, [1]],  # cat head P6
+   [-1, 3, C3, [1024, False]],  # 32 (P6/64-xlarge)
+
+   [[23, 26, 29, 32], 1, Detect, [nc]],  # Detect(P3, P4, P5, P6)
+  ]

ultralytics/models/v5/yolov5su.yaml

@@ -5,7 +5,6 @@ nc: 80  # number of classes
 depth_multiple: 0.33  # model depth multiple
 width_multiple: 0.50  # layer channel multiple
 
-
 # YOLOv5 v6.0 backbone
 backbone:
   # [from, number, module, args]

ultralytics/models/v5/yolov5x6u.yaml

@@ -0,0 +1,55 @@
+# Ultralytics YOLO 🚀, GPL-3.0 license
+
+# Parameters
+nc: 80  # number of classes
+depth_multiple: 1.33  # model depth multiple
+width_multiple: 1.25  # layer channel multiple
+
+# YOLOv5 v6.0 backbone
+backbone:
+  # [from, number, module, args]
+  [[-1, 1, Conv, [64, 6, 2, 2]],  # 0-P1/2
+   [-1, 1, Conv, [128, 3, 2]],  # 1-P2/4
+   [-1, 3, C3, [128]],
+   [-1, 1, Conv, [256, 3, 2]],  # 3-P3/8
+   [-1, 6, C3, [256]],
+   [-1, 1, Conv, [512, 3, 2]],  # 5-P4/16
+   [-1, 9, C3, [512]],
+   [-1, 1, Conv, [768, 3, 2]],  # 7-P5/32
+   [-1, 3, C3, [768]],
+   [-1, 1, Conv, [1024, 3, 2]],  # 9-P6/64
+   [-1, 3, C3, [1024]],
+   [-1, 1, SPPF, [1024, 5]],  # 11
+  ]
+
+# YOLOv5 v6.0 head
+head:
+  [[-1, 1, Conv, [768, 1, 1]],
+   [-1, 1, nn.Upsample, [None, 2, 'nearest']],
+   [[-1, 8], 1, Concat, [1]],  # cat backbone P5
+   [-1, 3, C3, [768, False]],  # 15
+
+   [-1, 1, Conv, [512, 1, 1]],
+   [-1, 1, nn.Upsample, [None, 2, 'nearest']],
+   [[-1, 6], 1, Concat, [1]],  # cat backbone P4
+   [-1, 3, C3, [512, False]],  # 19
+
+   [-1, 1, Conv, [256, 1, 1]],
+   [-1, 1, nn.Upsample, [None, 2, 'nearest']],
+   [[-1, 4], 1, Concat, [1]],  # cat backbone P3
+   [-1, 3, C3, [256, False]],  # 23 (P3/8-small)
+
+   [-1, 1, Conv, [256, 3, 2]],
+   [[-1, 20], 1, Concat, [1]],  # cat head P4
+   [-1, 3, C3, [512, False]],  # 26 (P4/16-medium)
+
+   [-1, 1, Conv, [512, 3, 2]],
+   [[-1, 16], 1, Concat, [1]],  # cat head P5
+   [-1, 3, C3, [768, False]],  # 29 (P5/32-large)
+
+   [-1, 1, Conv, [768, 3, 2]],
+   [[-1, 12], 1, Concat, [1]],  # cat head P6
+   [-1, 3, C3, [1024, False]],  # 32 (P6/64-xlarge)
+
+   [[23, 26, 29, 32], 1, Detect, [nc]],  # Detect(P3, P4, P5, P6)
+  ]

ultralytics/nn/autobackend.py

@@ -27,6 +27,10 @@ def check_class_names(names):
     if isinstance(names, dict):
         if not all(isinstance(k, int) for k in names.keys()):  # convert string keys to int, i.e. '0' to 0
             names = {int(k): v for k, v in names.items()}
+        n = len(names)
+        if max(names.keys()) >= n:
+            raise KeyError(f'{n}-class dataset requires class indices 0-{n - 1}, but you have invalid class indices '
+                           f'{min(names.keys())}-{max(names.keys())} defined in your dataset YAML.')
         if isinstance(names[0], str) and names[0].startswith('n0'):  # imagenet class codes, i.e. 'n01440764'
             map = yaml_load(ROOT / 'datasets/ImageNet.yaml')['map']  # human-readable names
             names = {k: map[v] for k, v in names.items()}
@@ -35,12 +39,14 @@ def check_class_names(names):
 
 class AutoBackend(nn.Module):
 
-    def _apply_default_class_names(self, data):
-        with contextlib.suppress(Exception):
-            return yaml_load(check_yaml(data))['names']
-        return {i: f'class{i}' for i in range(999)}  # return default if above errors
-
-    def __init__(self, weights='yolov8n.pt', device=torch.device('cpu'), dnn=False, data=None, fp16=False, fuse=True):
+    def __init__(self,
+                 weights='yolov8n.pt',
+                 device=torch.device('cpu'),
+                 dnn=False,
+                 data=None,
+                 fp16=False,
+                 fuse=True,
+                 verbose=True):
         """
         MultiBackend class for python inference on various platforms using Ultralytics YOLO.
 
@@ -51,6 +57,7 @@ class AutoBackend(nn.Module):
             data (str), (Path): Additional data.yaml file for class names, optional
             fp16 (bool): If True, use half precision. Default: False
             fuse (bool): Whether to fuse the model or not. Default: True
+            verbose (bool): Whether to run in verbose mode or not. Default: True
 
         Supported formats and their naming conventions:
             | Format                | Suffix           |
@@ -83,7 +90,7 @@ class AutoBackend(nn.Module):
         # NOTE: special case: in-memory pytorch model
         if nn_module:
             model = weights.to(device)
-            model = model.fuse() if fuse else model
+            model = model.fuse(verbose=verbose) if fuse else model
             names = model.module.names if hasattr(model, 'module') else model.names  # get class names
             stride = max(int(model.stride.max()), 32)  # model stride
             model.half() if fp16 else model.float()
@@ -410,6 +417,12 @@ class AutoBackend(nn.Module):
             for _ in range(2 if self.jit else 1):  #
                 self.forward(im)  # warmup
 
+    @staticmethod
+    def _apply_default_class_names(data):
+        with contextlib.suppress(Exception):
+            return yaml_load(check_yaml(data))['names']
+        return {i: f'class{i}' for i in range(999)}  # return default if above errors
+
     @staticmethod
     def _model_type(p='path/to/model.pt'):
         """

ultralytics/nn/tasks.py

@@ -8,9 +8,7 @@ import thop
 import torch
 import torch.nn as nn
 
-from ultralytics.nn.modules import (C1, C2, C3, C3TR, SPP, SPPF, Bottleneck, BottleneckCSP, C2f, C3Ghost, C3x, Classify,
-                                    Concat, Conv, ConvTranspose, Detect, DWConv, DWConvTranspose2d, Ensemble, Focus,
-                                    GhostBottleneck, GhostConv, Segment)
+from ultralytics.nn.modules import *  # noqa: F403
 from ultralytics.yolo.utils import DEFAULT_CFG_DICT, DEFAULT_CFG_KEYS, LOGGER, RANK, colorstr, emojis, yaml_load
 from ultralytics.yolo.utils.checks import check_requirements, check_yaml
 from ultralytics.yolo.utils.torch_utils import (fuse_conv_and_bn, fuse_deconv_and_bn, initialize_weights,
@@ -87,7 +85,7 @@ class BaseModel(nn.Module):
         if c:
             LOGGER.info(f"{sum(dt):10.2f} {'-':>10s} {'-':>10s}  Total")
 
-    def fuse(self):
+    def fuse(self, verbose=True):
         """
         Fuse the `Conv2d()` and `BatchNorm2d()` layers of the model into a single layer, in order to improve the
         computation efficiency.
@@ -105,7 +103,7 @@ class BaseModel(nn.Module):
                     m.conv_transpose = fuse_deconv_and_bn(m.conv_transpose, m.bn)
                     delattr(m, 'bn')  # remove batchnorm
                     m.forward = m.forward_fuse  # update forward
-            self.info()
+            self.info(verbose=verbose)
 
         return self
 
@@ -130,7 +128,7 @@ class BaseModel(nn.Module):
             verbose (bool): if True, prints out the model information. Defaults to False
             imgsz (int): the size of the image that the model will be trained on. Defaults to 640
         """
-        model_info(self, verbose, imgsz)
+        model_info(self, verbose=verbose, imgsz=imgsz)
 
     def _apply(self, fn):
         """
@@ -437,7 +435,7 @@ def parse_model(d, ch, verbose=True):  # model_dict, input_channels(3)
     ch = [ch]
     layers, save, c2 = [], [], ch[-1]  # layers, savelist, ch out
     for i, (f, n, m, args) in enumerate(d['backbone'] + d['head']):  # from, number, module, args
-        m = eval(m) if isinstance(m, str) else m  # eval strings
+        m = getattr(torch.nn, m[3:]) if 'nn.' in m else globals()[m]  # get module
         for j, a in enumerate(args):
             # TODO: re-implement with eval() removal if possible
             # args[j] = (locals()[a] if a in locals() else ast.literal_eval(a)) if isinstance(a, str) else a

ultralytics/yolo/cfg/__init__.py

@@ -61,8 +61,10 @@ CFG_BOOL_KEYS = ('save', 'exist_ok', 'pretrained', 'verbose', 'deterministic', '
                  'v5loader')
 
 # Define valid tasks and modes
-TASKS = 'detect', 'segment', 'classify'
 MODES = 'train', 'val', 'predict', 'export', 'track', 'benchmark'
+TASKS = 'detect', 'segment', 'classify'
+TASK2DATA = {'detect': 'coco128.yaml', 'segment': 'coco128-seg.yaml', 'classify': 'imagenet100'}
+TASK2MODEL = {'detect': 'yolov8n.pt', 'segment': 'yolov8n-seg.pt', 'classify': 'yolov8n-cls.pt'}
 
 
 def cfg2dict(cfg):
@@ -274,8 +276,11 @@ def entrypoint(debug=''):
 
     # Task
     task = overrides.pop('task', None)
-    if task and task not in TASKS:
+    if task:
+        if task not in TASKS:
             raise ValueError(f"Invalid 'task={task}'. Valid tasks are {TASKS}.\n{CLI_HELP_MSG}")
+        if 'model' not in overrides:
+            overrides['model'] = TASK2MODEL[task]
 
     # Model
     model = overrides.pop('model', DEFAULT_CFG.model)
@@ -287,7 +292,8 @@ def entrypoint(debug=''):
     model = YOLO(model, task=task)
 
     # Task Update
-    if task and task != model.task:
+    if task != model.task:
+        if task:
             LOGGER.warning(f"WARNING ⚠️ conflicting 'task={task}' passed with 'task={model.task}' model. "
                            f"Ignoring 'task={task}' and updating to 'task={model.task}' to match model.")
         task = model.task
@@ -299,8 +305,7 @@ def entrypoint(debug=''):
         LOGGER.warning(f"WARNING ⚠️ 'source' is missing. Using default 'source={overrides['source']}'.")
     elif mode in ('train', 'val'):
         if 'data' not in overrides:
-            task2data = dict(detect='coco128.yaml', segment='coco128-seg.yaml', classify='imagenet100')
-            overrides['data'] = task2data.get(task or DEFAULT_CFG.task, DEFAULT_CFG.data)
+            overrides['data'] = TASK2DATA.get(task or DEFAULT_CFG.task, DEFAULT_CFG.data)
             LOGGER.warning(f"WARNING ⚠️ 'data' is missing. Using default 'data={overrides['data']}'.")
     elif mode == 'export':
         if 'format' not in overrides:
@@ -322,4 +327,4 @@ def copy_default_cfg():
 
 if __name__ == '__main__':
     # entrypoint(debug='yolo predict model=yolov8n.pt')
-    entrypoint(debug='')
+    entrypoint(debug='yolo train model=yolov8n-seg.pt')

ultralytics/yolo/cfg/default.yaml

@@ -6,7 +6,7 @@ mode: train  # YOLO mode, i.e. train, val, predict, export
 
 # Train settings -------------------------------------------------------------------------------------------------------
 model:  # path to model file, i.e. yolov8n.pt, yolov8n.yaml
-data:  # path to data file, i.e. i.e. coco128.yaml
+data:  # path to data file, i.e. coco128.yaml
 epochs: 100  # number of epochs to train for
 patience: 50  # epochs to wait for no observable improvement for early stopping of training
 batch: 16  # number of images per batch (-1 for AutoBatch)

ultralytics/yolo/data/base.py

@@ -35,7 +35,8 @@ class BaseDataset(Dataset):
                  batch_size=None,
                  stride=32,
                  pad=0.5,
-                 single_cls=False):
+                 single_cls=False,
+                 classes=None):
         super().__init__()
         self.img_path = img_path
         self.imgsz = imgsz
@@ -45,8 +46,7 @@ class BaseDataset(Dataset):
 
         self.im_files = self.get_img_files(self.img_path)
         self.labels = self.get_labels()
-        if self.single_cls:
-            self.update_labels(include_class=[])
+        self.update_labels(include_class=classes)  # single_cls and include_class
 
         self.ni = len(self.labels)
 
@@ -96,7 +96,7 @@ class BaseDataset(Dataset):
         """include_class, filter labels to include only these classes (optional)"""
         include_class_array = np.array(include_class).reshape(1, -1)
         for i in range(len(self.labels)):
-            if include_class:
+            if include_class is not None:
                 cls = self.labels[i]['cls']
                 bboxes = self.labels[i]['bboxes']
                 segments = self.labels[i]['segments']
@@ -104,7 +104,7 @@ class BaseDataset(Dataset):
                 self.labels[i]['cls'] = cls[j]
                 self.labels[i]['bboxes'] = bboxes[j]
                 if segments:
-                    self.labels[i]['segments'] = segments[j]
+                    self.labels[i]['segments'] = [segments[si] for si, idx in enumerate(j) if idx]
             if self.single_cls:
                 self.labels[i]['cls'][:, 0] = 0
 

ultralytics/yolo/data/build.py

@@ -10,7 +10,7 @@ from PIL import Image
 from torch.utils.data import DataLoader, dataloader, distributed
 
 from ultralytics.yolo.data.dataloaders.stream_loaders import (LOADERS, LoadImages, LoadPilAndNumpy, LoadScreenshots,
-                                                              LoadStreams, SourceTypes, autocast_list)
+                                                              LoadStreams, LoadTensor, SourceTypes, autocast_list)
 from ultralytics.yolo.data.utils import IMG_FORMATS, VID_FORMATS
 from ultralytics.yolo.utils.checks import check_file
 
@@ -82,7 +82,8 @@ def build_dataloader(cfg, batch, img_path, stride=32, rect=False, names=None, ra
             prefix=colorstr(f'{mode}: '),
             use_segments=cfg.task == 'segment',
             use_keypoints=cfg.task == 'keypoint',
-            names=names)
+            names=names,
+            classes=cfg.classes)
 
     batch = min(batch, len(dataset))
     nd = torch.cuda.device_count()  # number of CUDA devices
@@ -133,7 +134,7 @@ def build_classification_dataloader(path,
 
 
 def check_source(source):
-    webcam, screenshot, from_img, in_memory = False, False, False, False
+    webcam, screenshot, from_img, in_memory, tensor = False, False, False, False, False
     if isinstance(source, (str, int, Path)):  # int for local usb camera
         source = str(source)
         is_file = Path(source).suffix[1:] in (IMG_FORMATS + VID_FORMATS)
@@ -149,22 +150,25 @@ def check_source(source):
         from_img = True
     elif isinstance(source, (Image.Image, np.ndarray)):
         from_img = True
+    elif isinstance(source, torch.Tensor):
+        tensor = True
     else:
         raise TypeError('Unsupported image type. See docs for supported types https://docs.ultralytics.com/predict')
 
-    return source, webcam, screenshot, from_img, in_memory
+    return source, webcam, screenshot, from_img, in_memory, tensor
 
 
 def load_inference_source(source=None, transforms=None, imgsz=640, vid_stride=1, stride=32, auto=True):
     """
     TODO: docs
     """
-    # source
-    source, webcam, screenshot, from_img, in_memory = check_source(source)
-    source_type = source.source_type if in_memory else SourceTypes(webcam, screenshot, from_img)
+    source, webcam, screenshot, from_img, in_memory, tensor = check_source(source)
+    source_type = source.source_type if in_memory else SourceTypes(webcam, screenshot, from_img, tensor)
 
     # Dataloader
-    if in_memory:
+    if tensor:
+        dataset = LoadTensor(source)
+    elif in_memory:
         dataset = source
     elif webcam:
         dataset = LoadStreams(source,

ultralytics/yolo/data/dataloaders/stream_loaders.py

@@ -26,6 +26,7 @@ class SourceTypes:
     webcam: bool = False
     screenshot: bool = False
     from_img: bool = False
+    tensor: bool = False
 
 
 class LoadStreams:
@@ -329,6 +330,23 @@ class LoadPilAndNumpy:
         return self
 
 
+class LoadTensor:
+
+    def __init__(self, imgs) -> None:
+        self.im0 = imgs
+        self.bs = imgs.shape[0]
+
+    def __iter__(self):
+        self.count = 0
+        return self
+
+    def __next__(self):
+        if self.count == 1:
+            raise StopIteration
+        self.count += 1
+        return None, self.im0, self.im0, None, ''  # self.paths, im, self.im0, None, ''
+
+
 def autocast_list(source):
     """
     Merges a list of source of different types into a list of numpy arrays or PIL images

ultralytics/yolo/data/dataloaders/v5loader.py

@@ -539,7 +539,7 @@ class LoadImagesAndLabels(Dataset):
                 j = (label[:, 0:1] == include_class_array).any(1)
                 self.labels[i] = label[j]
                 if segment:
-                    self.segments[i] = segment[j]
+                    self.segments[i] = [segment[si] for si, idx in enumerate(j) if idx]
             if single_cls:  # single-class training, merge all classes into 0
                 self.labels[i][:, 0] = 0
 

ultralytics/yolo/data/dataset.py

@@ -57,12 +57,14 @@ class YOLODataset(BaseDataset):
                  single_cls=False,
                  use_segments=False,
                  use_keypoints=False,
-                 names=None):
+                 names=None,
+                 classes=None):
         self.use_segments = use_segments
         self.use_keypoints = use_keypoints
         self.names = names
         assert not (self.use_segments and self.use_keypoints), 'Can not use both segments and keypoints.'
-        super().__init__(img_path, imgsz, cache, augment, hyp, prefix, rect, batch_size, stride, pad, single_cls)
+        super().__init__(img_path, imgsz, cache, augment, hyp, prefix, rect, batch_size, stride, pad, single_cls,
+                         classes)
 
     def cache_labels(self, path=Path('./labels.cache')):
         """Cache dataset labels, check images and read shapes.

ultralytics/yolo/data/utils.py

@@ -16,6 +16,7 @@ import numpy as np
 from PIL import ExifTags, Image, ImageOps
 from tqdm import tqdm
 
+from ultralytics.nn.autobackend import check_class_names
 from ultralytics.yolo.utils import DATASETS_DIR, LOGGER, NUM_THREADS, ROOT, colorstr, emojis, yaml_load
 from ultralytics.yolo.utils.checks import check_file, check_font, is_ascii
 from ultralytics.yolo.utils.downloads import download, safe_download, unzip_file
@@ -211,8 +212,7 @@ def check_det_dataset(dataset, autodownload=True):
             raise SyntaxError(
                 emojis(f"{dataset} '{k}:' key missing ❌.\n"
                        f"'train', 'val' and 'names' are required in data.yaml files."))
-    if isinstance(data['names'], (list, tuple)):  # old array format
-        data['names'] = dict(enumerate(data['names']))  # convert to dict
+    data['names'] = check_class_names(data['names'])
     data['nc'] = len(data['names'])
 
     # Resolve paths

ultralytics/yolo/engine/exporter.py

@@ -574,7 +574,7 @@ class Exporter:
         LOGGER.info(f'\n{prefix} starting export with tensorflow {tf.__version__}...')
         saved_model = Path(str(self.file).replace(self.file.suffix, '_saved_model'))
         if self.args.int8:
-            f = saved_model / (self.file.stem + 'yolov8n_integer_quant.tflite')  # fp32 in/out
+            f = saved_model / (self.file.stem + '_integer_quant.tflite')  # fp32 in/out
         elif self.args.half:
             f = saved_model / (self.file.stem + '_float16.tflite')
         else:
@@ -863,18 +863,6 @@ def export(cfg=DEFAULT_CFG):
     cfg.model = cfg.model or 'yolov8n.yaml'
     cfg.format = cfg.format or 'torchscript'
 
-    # exporter = Exporter(cfg)
-    #
-    # model = None
-    # if isinstance(cfg.model, (str, Path)):
-    #     if Path(cfg.model).suffix == '.yaml':
-    #         model = DetectionModel(cfg.model)
-    #     elif Path(cfg.model).suffix == '.pt':
-    #         model = attempt_load_weights(cfg.model, fuse=True)
-    #     else:
-    #         TypeError(f'Unsupported model type {cfg.model}')
-    # exporter(model=model)
-
     from ultralytics import YOLO
     model = YOLO(cfg.model)
     model.export(**vars(cfg))

ultralytics/yolo/engine/model.py

@@ -203,6 +203,8 @@ class YOLO:
         if source is None:
             source = ROOT / 'assets' if is_git_dir() else 'https://ultralytics.com/images/bus.jpg'
             LOGGER.warning(f"WARNING ⚠️ 'source' is missing. Using 'source={source}'.")
+        is_cli = (sys.argv[0].endswith('yolo') or sys.argv[0].endswith('ultralytics')) and \
+                 ('predict' in sys.argv or 'mode=predict' in sys.argv)
 
         overrides = self.overrides.copy()
         overrides['conf'] = 0.25
@@ -213,10 +215,9 @@ class YOLO:
         if not self.predictor:
             self.task = overrides.get('task') or self.task
             self.predictor = TASK_MAP[self.task][3](overrides=overrides)
-            self.predictor.setup_model(model=self.model)
+            self.predictor.setup_model(model=self.model, verbose=is_cli)
         else:  # only update args if predictor is already setup
             self.predictor.args = get_cfg(self.predictor.args, overrides)
-        is_cli = sys.argv[0].endswith('yolo') or sys.argv[0].endswith('ultralytics')
         return self.predictor.predict_cli(source=source) if is_cli else self.predictor(source=source, stream=stream)
 
     def track(self, source=None, stream=False, **kwargs):

ultralytics/yolo/engine/predictor.py

@@ -183,6 +183,8 @@ class BasePredictor:
                     'preprocess': self.dt[0].dt * 1E3 / n,
                     'inference': self.dt[1].dt * 1E3 / n,
                     'postprocess': self.dt[2].dt * 1E3 / n}
+                if self.source_type.tensor:  # skip write, show and plot operations if input is raw tensor
+                    continue
                 p, im0 = (path[i], im0s[i].copy()) if self.source_type.webcam or self.source_type.from_img \
                     else (path, im0s.copy())
                 p = Path(p)
@@ -218,11 +220,16 @@ class BasePredictor:
 
         self.run_callbacks('on_predict_end')
 
-    def setup_model(self, model):
-        device = select_device(self.args.device)
+    def setup_model(self, model, verbose=True):
+        device = select_device(self.args.device, verbose=verbose)
         model = model or self.args.model
         self.args.half &= device.type != 'cpu'  # half precision only supported on CUDA
-        self.model = AutoBackend(model, device=device, dnn=self.args.dnn, data=self.args.data, fp16=self.args.half)
+        self.model = AutoBackend(model,
+                                 device=device,
+                                 dnn=self.args.dnn,
+                                 data=self.args.data,
+                                 fp16=self.args.half,
+                                 verbose=verbose)
         self.device = device
         self.model.eval()
 

ultralytics/yolo/engine/trainer.py

@@ -25,8 +25,8 @@ from tqdm import tqdm
 from ultralytics.nn.tasks import attempt_load_one_weight, attempt_load_weights
 from ultralytics.yolo.cfg import get_cfg
 from ultralytics.yolo.data.utils import check_cls_dataset, check_det_dataset
-from ultralytics.yolo.utils import (DEFAULT_CFG, LOGGER, RANK, SETTINGS, TQDM_BAR_FORMAT, __version__, callbacks,
-                                    colorstr, emojis, yaml_save)
+from ultralytics.yolo.utils import (DEFAULT_CFG, LOGGER, ONLINE, RANK, ROOT, SETTINGS, TQDM_BAR_FORMAT, __version__,
+                                    callbacks, colorstr, emojis, yaml_save)
 from ultralytics.yolo.utils.autobatch import check_train_batch_size
 from ultralytics.yolo.utils.checks import check_file, check_imgsz, print_args
 from ultralytics.yolo.utils.dist import ddp_cleanup, generate_ddp_command
@@ -111,8 +111,6 @@ class BaseTrainer:
             print_args(vars(self.args))
 
         # Device
-        self.amp = self.device.type != 'cpu'
-        self.scaler = amp.GradScaler(enabled=self.amp)
         if self.device.type == 'cpu':
             self.args.workers = 0  # faster CPU training as time dominated by inference, not dataloading
 
@@ -126,7 +124,7 @@ class BaseTrainer:
                 if 'yaml_file' in self.data:
                     self.args.data = self.data['yaml_file']  # for validating 'yolo train data=url.zip' usage
         except Exception as e:
-            raise FileNotFoundError(emojis(f"Dataset '{self.args.data}' error ❌ {e}")) from e
+            raise RuntimeError(emojis(f"Dataset '{self.args.data}' error ❌ {e}")) from e
 
         self.trainset, self.testset = self.get_dataset(self.data)
         self.ema = None
@@ -204,6 +202,8 @@ class BaseTrainer:
         ckpt = self.setup_model()
         self.model = self.model.to(self.device)
         self.set_model_attributes()
+        self.amp = check_amp(self.model)
+        self.scaler = amp.GradScaler(enabled=self.amp)
         if world_size > 1:
             self.model = DDP(self.model, device_ids=[rank])
         # Check imgsz
@@ -597,3 +597,31 @@ class BaseTrainer:
         LOGGER.info(f"{colorstr('optimizer:')} {type(optimizer).__name__}(lr={lr}) with parameter groups "
                     f'{len(g[1])} weight(decay=0.0), {len(g[0])} weight(decay={decay}), {len(g[2])} bias')
         return optimizer
+
+
+def check_amp(model):
+    # Check PyTorch Automatic Mixed Precision (AMP) functionality. Return True on correct operation
+    device = next(model.parameters()).device  # get model device
+    if device.type in ('cpu', 'mps'):
+        return False  # AMP only used on CUDA devices
+
+    def amp_allclose(m, im):
+        # All close FP32 vs AMP results
+        a = m(im, device=device, verbose=False)[0].boxes.boxes  # FP32 inference
+        with torch.cuda.amp.autocast(True):
+            b = m(im, device=device, verbose=False)[0].boxes.boxes  # AMP inference
+        return a.shape == b.shape and torch.allclose(a, b.float(), atol=0.1)  # close to 10% absolute tolerance
+
+    f = ROOT / 'assets/bus.jpg'  # image to check
+    im = f if f.exists() else 'https://ultralytics.com/images/bus.jpg' if ONLINE else np.ones((640, 640, 3))
+    prefix = colorstr('AMP: ')
+    try:
+        from ultralytics import YOLO
+        LOGGER.info(f'{prefix}running Automatic Mixed Precision (AMP) checks with YOLOv8n...')
+        assert amp_allclose(YOLO('yolov8n.pt'), im)
+        LOGGER.info(f'{prefix}checks passed ✅')
+        return True
+    except AssertionError:
+        LOGGER.warning(f'{prefix}checks failed ❌. Anomalies were detected with AMP on your system that may lead to '
+                       f'NaN losses or zero-mAP results, so AMP will be disabled during training.')
+        return False

ultralytics/yolo/utils/checks.py

@@ -236,9 +236,10 @@ def check_suffix(file='yolov8n.pt', suffix='.pt', msg=''):
 
 def check_yolov5u_filename(file: str, verbose: bool = True):
     # Replace legacy YOLOv5 filenames with updated YOLOv5u filenames
-    if 'yolov3' in file or 'yolov5' in file and 'u' not in file:
+    if ('yolov3' in file or 'yolov5' in file) and 'u' not in file:
         original_file = file
         file = re.sub(r'(.*yolov5([nsmlx]))\.', '\\1u.', file)  # i.e. yolov5n.pt -> yolov5nu.pt
+        file = re.sub(r'(.*yolov5([nsmlx])6)\.', '\\1u.', file)  # i.e. yolov5n6.pt -> yolov5n6u.pt
         file = re.sub(r'(.*yolov3(|-tiny|-spp))\.', '\\1u.', file)  # i.e. yolov3-spp.pt -> yolov3-sppu.pt
         if file != original_file and verbose:
             LOGGER.info(f"PRO TIP 💡 Replace 'model={original_file}' with new 'model={file}'.\nYOLOv5 'u' models are "

ultralytics/yolo/utils/torch_utils.py

@@ -162,11 +162,13 @@ def fuse_deconv_and_bn(deconv, bn):
     return fuseddconv
 
 
-def model_info(model, verbose=False, imgsz=640):
+def model_info(model, detailed=False, verbose=True, imgsz=640):
     # Model information. imgsz may be int or list, i.e. imgsz=640 or imgsz=[640, 320]
+    if not verbose:
+        return
     n_p = get_num_params(model)
     n_g = get_num_gradients(model)  # number gradients
-    if verbose:
+    if detailed:
         LOGGER.info(
             f"{'layer':>5} {'name':>40} {'gradient':>9} {'parameters':>12} {'shape':>20} {'mu':>10} {'sigma':>10}")
         for i, (name, p) in enumerate(model.named_parameters()):

ultralytics/yolo/v8/classify/predict.py

@@ -14,14 +14,13 @@ class ClassificationPredictor(BasePredictor):
         return Annotator(img, example=str(self.model.names), pil=True)
 
     def preprocess(self, img):
-        img = (img if isinstance(img, torch.Tensor) else torch.Tensor(img)).to(self.model.device)
-        img = img.half() if self.model.fp16 else img.float()  # uint8 to fp16/32
-        return img
+        img = (img if isinstance(img, torch.Tensor) else torch.from_numpy(img)).to(self.model.device)
+        return img.half() if self.model.fp16 else img.float()  # uint8 to fp16/32
 
-    def postprocess(self, preds, img, orig_img):
+    def postprocess(self, preds, img, orig_imgs):
         results = []
         for i, pred in enumerate(preds):
-            orig_img = orig_img[i] if isinstance(orig_img, list) else orig_img
+            orig_img = orig_imgs[i] if isinstance(orig_imgs, list) else orig_imgs
             path, _, _, _, _ = self.batch
             img_path = path[i] if isinstance(path, list) else path
             results.append(Results(orig_img=orig_img, path=img_path, names=self.model.names, probs=pred))

ultralytics/yolo/v8/detect/predict.py

@@ -14,12 +14,12 @@ class DetectionPredictor(BasePredictor):
         return Annotator(img, line_width=self.args.line_thickness, example=str(self.model.names))
 
     def preprocess(self, img):
-        img = torch.from_numpy(img).to(self.model.device)
+        img = (img if isinstance(img, torch.Tensor) else torch.from_numpy(img)).to(self.model.device)
         img = img.half() if self.model.fp16 else img.float()  # uint8 to fp16/32
         img /= 255  # 0 - 255 to 0.0 - 1.0
         return img
 
-    def postprocess(self, preds, img, orig_img):
+    def postprocess(self, preds, img, orig_imgs):
         preds = ops.non_max_suppression(preds,
                                         self.args.conf,
                                         self.args.iou,
@@ -29,7 +29,7 @@ class DetectionPredictor(BasePredictor):
 
         results = []
         for i, pred in enumerate(preds):
-            orig_img = orig_img[i] if isinstance(orig_img, list) else orig_img
+            orig_img = orig_imgs[i] if isinstance(orig_imgs, list) else orig_imgs
             shape = orig_img.shape
             pred[:, :4] = ops.scale_boxes(img.shape[2:], pred[:, :4], shape).round()
             path, _, _, _, _ = self.batch

ultralytics/yolo/v8/segment/predict.py

@@ -10,7 +10,7 @@ from ultralytics.yolo.v8.detect.predict import DetectionPredictor
 
 class SegmentationPredictor(DetectionPredictor):
 
-    def postprocess(self, preds, img, orig_img):
+    def postprocess(self, preds, img, orig_imgs):
         # TODO: filter by classes
         p = ops.non_max_suppression(preds[0],
                                     self.args.conf,
@@ -22,7 +22,7 @@ class SegmentationPredictor(DetectionPredictor):
         results = []
         proto = preds[1][-1] if len(preds[1]) == 3 else preds[1]  # second output is len 3 if pt, but only 1 if exported
         for i, pred in enumerate(p):
-            orig_img = orig_img[i] if isinstance(orig_img, list) else orig_img
+            orig_img = orig_imgs[i] if isinstance(orig_imgs, list) else orig_imgs
             shape = orig_img.shape
             path, _, _, _, _ = self.batch
             img_path = path[i] if isinstance(path, list) else path