convert pt model to onnx

.gitignore

@@ -20,3 +20,8 @@ dvc/config.local
 
 # .DS_Store
 .DS_Store
+
+# Models
+*.pth
+*.onnx
+*.onnx.data

pyproject.toml

@@ -25,7 +25,8 @@ dev = [
 deploy = [
     "onnx~=1.22.0",
     "onnxruntime~=1.27.0",
-    "openvino~=2026.2.0"
+    "onnxscript~=0.7.0",
+    "openvino~=2026.2.0",
 ]
 
 [tool.ruff]

quickdraw_bot/assets/config.yaml

@@ -22,6 +22,8 @@ train:
 eval:
   test_data_dir: ./data/processed/test
   model_path: ./assets/model.pth
-  random_seed: 1
+to_onnx:
-deploy:
+  model_path: ./assets/model.pth
-  random_seed: 1
+  image_size: [28, 28]
+  cls_map_path: ./data/processed/cate_id_cate_name_map.json
+  onnx_path: ./assets/model.onnx

quickdraw_bot/assets/model.onnx.dvc

@@ -0,0 +1,5 @@
+outs:
+- md5: 5a641ce9dc5db7b16a4868773eb968dc
+  size: 1755967
+  hash: md5
+  path: model.onnx

quickdraw_bot/prepare.py

@@ -3,6 +3,7 @@
 # author: deng
 # date  : 20260616
 
+import json
 import random
 from pathlib import Path
 from shutil import rmtree
@@ -21,7 +22,7 @@ class Prepare:
         random.seed(self.config['random_seed'])
         np.random.seed(self.config['random_seed'])
 
-    def _load_dataset(self) -> dict[str, np.ndarray]:
+    def _load_dataset(self) -> tuple[dict[str, np.ndarray], dict[str, int]]:
         data: dict[str, list] = {'images': [], 'cate_names': [], 'cate_ids': []}
         cls_id_map: dict[str, int] = {}
         raw_data_dir = Path(self.config['data_dir']) / 'raw'
@@ -45,7 +46,7 @@ class Prepare:
         data['images'] = np.array(data['images']).astype(np.uint8)
         data['cate_names'] = np.array(data['cate_names']).astype('S30')
         data['cate_ids'] = np.array(data['cate_ids']).astype(np.uint16)
-        return data
+        return data, cls_id_map
 
     def _split_data(self, data: dict[str, np.ndarray]) -> dict[str, dict[str, np.ndarray]]:
         weights = self.config['data_split']
@@ -67,7 +68,7 @@ class Prepare:
             sets[name] = {key: value[idx] for key, value in data.items()}
         return sets
 
-    def _save_data(self, sets: dict[str, dict[str, np.ndarray]]) -> None:
+    def _save_data(self, sets: dict[str, dict[str, np.ndarray]], cls_id_map: dict[str, int]) -> None:
         save_dir = Path(self.config['data_dir']) / 'processed'
         if save_dir.exists():
             rmtree(save_dir)
@@ -77,11 +78,14 @@ class Prepare:
             usage_dir.mkdir()
             for key, value in data.items():
                 np.save(f'{usage_dir}/{key}.npy', value)
+        cate_id_cate_name_map = {v: k for k, v in cls_id_map.items()}
+        with open(f'{save_dir}/cate_id_cate_name_map.json', 'w') as f:
+            json.dump(cate_id_cate_name_map, f, indent=2)
 
     def run(self):
-        data = self._load_dataset()
+        data, cls_id_map = self._load_dataset()
         sets = self._split_data(data)
-        self._save_data(sets)
+        self._save_data(sets, cls_id_map)
 
 
 if __name__ == '__main__':

quickdraw_bot/to_onnx.py

@@ -0,0 +1,98 @@
+# to_onnx.py
+#
+# author: deng
+# date  : 20260618
+
+import json
+import time
+from pathlib import Path
+
+import cv2
+import numpy as np
+import onnxruntime as ort
+import torch
+
+from quickdraw_bot.utils.utils import load_config
+
+
+class Pipeline(torch.nn.Module):
+    def __init__(self, model: torch.nn.Module, input_size: tuple[int, int]):
+        super().__init__()
+        self._model = model
+        self._input_size = input_size
+
+    def forward(self, inputs: torch.Tensor) -> torch.Tensor:
+        inputs = inputs.float() / 255.0
+        inputs = torch.nn.functional.interpolate(inputs, size=self._input_size, mode='bilinear', align_corners=False)
+        logits = self._model(inputs)
+        probs = torch.nn.functional.softmax(logits, dim=-1)
+        return probs
+
+
+class ToONNX:
+    def __init__(self, config_path: str = './assets/config.yaml'):
+        self.config = load_config(config_path)['to_onnx']
+
+    def _get_cls_map(self) -> dict[int, str]:
+        cls_map_path = Path(self.config['cls_map_path'])
+        if not cls_map_path.exists():
+            return None
+        with open(cls_map_path, 'r') as f:
+            cls_map = json.load(f)
+        return cls_map
+
+    def _get_model(self) -> torch.nn.Module:
+        model = torch.load(self.config['model_path'], map_location='cpu', weights_only=False)
+        model.eval()
+        return model
+
+    def _get_pipeline(self) -> torch.nn.Module:
+        pipeline = Pipeline(
+            model=self._get_model(),
+            input_size=tuple(self.config['image_size']),
+        )
+        return pipeline
+
+    def run(self) -> None:
+        pipeline = self._get_pipeline()
+        dummy_input = torch.randint(0, 256, (1, 1, self.config['image_size'][0], self.config['image_size'][1]), dtype=torch.uint8)
+        torch.onnx.export(
+            pipeline,
+            dummy_input,
+            self.config['onnx_path'],
+            input_names=['inputs'],
+            output_names=['outputs'],
+            dynamic_axes={'inputs': {0: 'batch_size', 2: 'height', 3: 'width'}, 'outputs': {0: 'batch_size'}},
+            opset_version=18,
+            dynamo=False,
+            verbose=True,
+        )
+        print(f'Done! ONNX file saved to {self.config["onnx_path"]}')
+
+    def test_infer(self, image_path: str) -> None:
+
+        # Get cls map
+        cls_map: dict[str, str] = self._get_cls_map()
+        cls_names = list(cls_map.values())
+
+        # Load Image
+        image = cv2.imread(image_path, cv2.IMREAD_GRAYSCALE)
+        image = image[np.newaxis, np.newaxis, :, :]
+
+        # Infer
+        onnx_session = ort.InferenceSession(
+            self.config['onnx_path'],
+            providers=['CPUExecutionProvider'],
+        )
+        start_time = time.perf_counter()
+        outputs = onnx_session.run(None, {'inputs': image})[0]
+        elapsed_time_ms = (time.perf_counter() - start_time) * 1000
+        result = [{cls_name: round(float(prob), 3) for cls_name, prob in zip(cls_names, prob_arr)} for prob_arr in outputs]
+        print(f'Elapsed time: {elapsed_time_ms:.2f} ms')
+        print(f'Image: {image_path}')
+        print(f'Result: {result}')
+
+
+if __name__ == '__main__':
+    ToONNX().run()
+    ToONNX().test_infer('./assets/favicon.png')

uv.lock

@@ -1793,6 +1793,22 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/00/50/257a880384a1dd502d543b0067945074d63cd17d0840e958355bc8197da8/onnx-1.22.0-cp314-cp314t-win_arm64.whl", hash = "sha256:8e268cdc0547e3949799ffd4a44451dc2b9080b57d0824a2db680b6ec65506f0", size = 17231391, upload-time = "2026-06-15T12:50:03.047Z" },
 ]
 
+[[package]]
+name = "onnx-ir"
+version = "0.2.1"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "ml-dtypes" },
+    { name = "numpy" },
+    { name = "onnx" },
+    { name = "sympy" },
+    { name = "typing-extensions" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/35/e6/672fefb2f108d077f58181a7babf4c0f8d1182a30353ffc9c79c63afc5ee/onnx_ir-0.2.1.tar.gz", hash = "sha256:8b8b10a93f43e65962104de6070c43c5dacb0e3cdfefc7c8059dd83c9db64f35", size = 144279, upload-time = "2026-04-20T20:21:47.735Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/8c/aa/f7a53321c60b9ad9ee184b6018292ed6b5389947592a2c8c09c736bb7f9e/onnx_ir-0.2.1-py3-none-any.whl", hash = "sha256:c7285da889312f91882de2092e298a9eeeefbfc1d1951c49d983992967eb09a7", size = 166792, upload-time = "2026-04-20T20:21:46.357Z" },
+]
+
 [[package]]
 name = "onnxruntime"
 version = "1.27.0"
@@ -1820,6 +1836,23 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/b7/f6/2bac21f722aa45d876d4a51f26bd0ef30e704068a3cd5021a5a7cd784271/onnxruntime-1.27.0-cp314-cp314t-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl", hash = "sha256:370d211e1ceeac4cd5f45301655463ac59e27cdc74d9f7aeb2d19ff4b7a76715", size = 18670781, upload-time = "2026-06-15T22:43:17.151Z" },
 ]
 
+[[package]]
+name = "onnxscript"
+version = "0.7.0"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "ml-dtypes" },
+    { name = "numpy" },
+    { name = "onnx" },
+    { name = "onnx-ir" },
+    { name = "packaging" },
+    { name = "typing-extensions" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/9b/99/fd948eba63ba65b52265a4cd09a14f96bb9f5b730fcef58876c4358bf406/onnxscript-0.7.0.tar.gz", hash = "sha256:c95ed7b339b02cface56ee27689565c46612e1fc542c562298dddfdad5268dc5", size = 612032, upload-time = "2026-04-20T17:09:19.775Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/b9/ce/2ed92575cc3be4ea1db5f38f16f20765f9b20b69b14d6c1d9972658a8ee9/onnxscript-0.7.0-py3-none-any.whl", hash = "sha256:5b356907d4501e9919f8599c91d8da967406a37b1fac2b40caa55a49acf242ea", size = 714842, upload-time = "2026-04-20T17:09:22.089Z" },
+]
+
 [[package]]
 name = "opencv-python-headless"
 version = "4.13.0.92"
@@ -2446,6 +2479,7 @@ dependencies = [
 deploy = [
     { name = "onnx" },
     { name = "onnxruntime" },
+    { name = "onnxscript" },
     { name = "openvino" },
 ]
 dev = [
@@ -2471,6 +2505,7 @@ requires-dist = [
 deploy = [
     { name = "onnx", specifier = "~=1.22.0" },
     { name = "onnxruntime", specifier = "~=1.27.0" },
+    { name = "onnxscript", specifier = "~=0.7.0" },
     { name = "openvino", specifier = "~=2026.2.0" },
 ]
 dev = [