Add support for sparse YOLOv5 models

.github/workflows/ci.yml

@@ -93,6 +93,10 @@ jobs:
         run: >
           pip install yolov5==7.0.9
 
+      - name: Install DeepSparse
+        run: >
+          pip install deepsparse
+
       - name: Install Transformers(4.25.1)
         run: >
           pip install transformers==4.25.1

.github/workflows/ci_torch1.10.yml

@@ -94,6 +94,10 @@ jobs:
         run: >
           pip install yolov5==7.0.9
 
+      - name: Install DeepSparse
+        run: >
+          pip install deepsparse
+
       - name: Install Detectron2(0.6)
         run: >
           python -m pip install detectron2 -f https://dl.fbaipublicfiles.com/detectron2/wheels/cpu/torch1.10/index.html

sahi/auto_model.py

@@ -9,6 +9,7 @@
     "detectron2": "Detectron2DetectionModel",
     "huggingface": "HuggingfaceDetectionModel",
     "torchvision": "TorchVisionDetectionModel",
+    "yolov5sparse": "Yolov5SparseDetectionModel",
 }
 
 

sahi/models/yolov5sparse.py

@@ -0,0 +1,220 @@
+# OBSS SAHI Tool
+# Code written by Fatih C Akyon, 2020.
+# Using YOLOv5 sparse models from Neural Magic using DeepSparse
+# https://neuralmagic.com/deepsparse
+
+import logging
+from typing import Any, Dict, List, Optional
+
+import numpy as np
+
+from sahi.models.base import DetectionModel
+from sahi.prediction import ObjectPrediction
+from sahi.utils.compatibility import fix_full_shape_list, fix_shift_amount_list
+from sahi.utils.import_utils import check_package_minimum_version, check_requirements
+
+logger = logging.getLogger(__name__)
+
+
+class Yolov5SparseDetectionModel(DetectionModel):
+    def check_dependencies(self) -> None:
+        check_requirements(["deepsparse", "sparseml"])
+
+    def load_model(self):
+        """
+        Detection model is initialized and set to self.model.
+        """
+
+        from deepsparse import Pipeline
+
+        try:
+            model = Pipeline.create(task="yolo", model_path=self.model_path)
+            self.set_model(model)
+        except Exception as e:
+            raise TypeError("Could not load the model: ", e)
+
+    def set_model(self, model: Any):
+        """
+        Sets the underlying YOLOv5 model.
+        Args:
+            model: Any
+                A YOLOv5 model
+        """
+
+        self.model = model
+
+        # set category_mapping
+        if not self.category_mapping:
+            category_mapping = {str(ind): category_name for ind, category_name in enumerate(self.category_names)}
+            self.category_mapping = category_mapping
+
+    def perform_inference(self, image: np.ndarray):
+        """
+        Prediction is performed using self.model and the prediction result is set to self._original_predictions.
+        Args:
+            image: np.ndarray
+                A numpy array that contains the image to be predicted. 3 channel image should be in RGB order.
+        """
+
+        # Confirm model is loaded
+        if self.model is None:
+            raise ValueError("Model is not loaded, load it by calling .load_model()")
+        if self.image_size is not None:
+            prediction_result = self.model(
+                images=[image], conf_thres=self.confidence_threshold, image_size=self.image_size
+            )
+        else:
+            prediction_result = self.model(images=[image], conf_thres=self.confidence_threshold)
+
+        self._original_predictions = prediction_result
+
+    @property
+    def num_categories(self):
+        """
+        Returns number of categories
+        """
+        return 80
+
+    @property
+    def category_names(self):
+        return [
+            "person",
+            "bicycle",
+            "car",
+            "motorcycle",
+            "airplane",
+            "bus",
+            "train",
+            "truck",
+            "boat",
+            "traffic light",
+            "fire hydrant",
+            "stop sign",
+            "parking meter",
+            "bench",
+            "bird",
+            "cat",
+            "dog",
+            "horse",
+            "sheep",
+            "cow",
+            "elephant",
+            "bear",
+            "zebra",
+            "giraffe" "backpack",
+            "umbrella",
+            "handbag",
+            "tie",
+            "suitcase",
+            "frisbee",
+            "skis",
+            "snowboard",
+            "sports ball",
+            "kite",
+            "baseball bat",
+            "baseball glove",
+            "skateboard",
+            "surfboard",
+            "tennis racket",
+            "bottle",
+            "wine glass",
+            "cup",
+            "fork",
+            "knife",
+            "spoon",
+            "bowl",
+            "banana",
+            "apple",
+            "sandwich",
+            "orange",
+            "broccoli",
+            "carrot",
+            "hot dog",
+            "pizza",
+            "donut",
+            "cake",
+            "chair",
+            "couch",
+            "potted plant",
+            "bed",
+            "dining table",
+            "toilet",
+            "tv",
+            "laptop",
+            "mouse",
+            "remote",
+            "keyboard",
+            "cell phone",
+            "microwave",
+            "oven",
+            "toaster",
+            "sink",
+            "refrigerator",
+            "book",
+            "clock",
+            "vase",
+            "scissors",
+            "teddy bear",
+            "hair drier",
+            "toothbrush",
+        ]
+
+    def _create_object_prediction_list_from_original_predictions(
+        self,
+        shift_amount_list: Optional[List[List[int]]] = [[0, 0]],
+        full_shape_list: Optional[List[List[int]]] = None,
+    ):
+        """
+        self._original_predictions is converted to a list of prediction.ObjectPrediction and set to
+        self._object_prediction_list_per_image.
+        Args:
+            shift_amount_list: list of list
+                To shift the box and mask predictions from sliced image to full sized image, should
+                be in the form of List[[shift_x, shift_y],[shift_x, shift_y],...]
+            full_shape_list: list of list
+                Size of the full image after shifting, should be in the form of
+                List[[height, width],[height, width],...]
+        """
+
+        original_predictions = self._original_predictions
+        # compatilibty for sahi v0.8.15
+        shift_amount_list = fix_shift_amount_list(shift_amount_list)
+        full_shape_list = fix_full_shape_list(full_shape_list)
+
+        # handle all predictions
+        object_prediction_list_per_image = []
+        for image_ind, (prediction_bboxes, prediction_scores, prediction_categories) in enumerate(original_predictions):
+            shift_amount = shift_amount_list[image_ind]
+            full_shape = None if full_shape_list is None else full_shape_list[image_ind]
+            object_prediction_list = []
+
+            # process predictions
+            for bbox, score, category_id in zip(prediction_bboxes, prediction_scores, prediction_categories):
+                category_id = int(float(category_id))
+                category_name = self.category_mapping[str(category_id)]
+
+                # fix out of image box coords
+                if full_shape is not None:
+                    bbox[0] = min(full_shape[1], bbox[0])
+                    bbox[1] = min(full_shape[0], bbox[1])
+                    bbox[2] = min(full_shape[1], bbox[2])
+                    bbox[3] = min(full_shape[0], bbox[3])
+
+                # ignore invalid predictions
+                if not (bbox[0] < bbox[2]) or not (bbox[1] < bbox[3]):
+                    logger.warning(f"ignoring invalid prediction with bbox: {bbox}")
+                    continue
+
+                object_prediction = ObjectPrediction(
+                    bbox=bbox,
+                    category_id=category_id,
+                    score=score,
+                    bool_mask=None,
+                    category_name=category_name,
+                    shift_amount=shift_amount,
+                    full_shape=full_shape,
+                )
+                object_prediction_list.append(object_prediction)
+            object_prediction_list_per_image.append(object_prediction_list)
+
+        self._object_prediction_list_per_image = object_prediction_list_per_image

sahi/utils/sparseyolov5.py

@@ -0,0 +1,2 @@
+class Yolov5TestConstants:
+    YOLOV_MODEL_URL = "zoo:cv/detection/yolov5-s/pytorch/ultralytics/coco/pruned-aggressive_96"