Merge pull request #39 from SFI-Visual-Intelligence/Jan/accuracy

Added accuracy and tests for it and Jan model, no clashes merging myself

Author: hzavadil98

tests/test_metrics.py

@@ -1,6 +1,4 @@
-
-from utils.metrics import F1Score, Precision, Recall
-
+from utils.metrics import Accuracy, F1Score, Precision, Recall
 
 
 def test_recall():
@@ -84,3 +82,18 @@ def test_for_zero_denominator():
         assert precision4.allclose(torch.tensor(0.0), atol=1e-5), (
             f"Precision Score: {precision4.item()}"
         )
+
+
+def test_accuracy():
+    import torch
+
+    accuracy = Accuracy()
+
+    y_true = torch.tensor([0, 3, 2, 3, 4])
+    y_pred = torch.tensor([0, 1, 2, 3, 4])
+
+    accuracy_score = accuracy(y_true, y_pred)
+
+    assert (torch.abs(torch.tensor(accuracy_score - 0.8)) < 1e-5), (
+        f"Accuracy Score: {accuracy_score.item()}"
+    )

tests/test_models.py

@@ -1,7 +1,7 @@
 import pytest
 import torch
 
-from utils.models import ChristianModel
+from utils.models import ChristianModel, JanModel
 
 
 @pytest.mark.parametrize(
@@ -20,3 +20,18 @@ def test_christian_model(image_shape, num_classes):
     assert y.sum(dim=1).allclose(torch.ones(n), atol=1e-5), (
         f"Softmax output should sum to 1, but got: {y.sum()}"
     )
+
+
+@pytest.mark.parametrize(
+    "image_shape, num_classes",
+    [((1, 28, 28), 4), ((3, 16, 16), 10)],
+)
+def test_jan_model(image_shape, num_classes):
+    n, c, h, w = 5, *image_shape
+
+    model = JanModel(image_shape, num_classes)
+
+    x = torch.randn(n, c, h, w)
+    y = model(x)
+
+    assert y.shape == (n, num_classes), f"Shape: {y.shape}"

utils/load_metric.py

@@ -3,7 +3,7 @@
 import numpy as np
 import torch.nn as nn
 
-from .metrics import EntropyPrediction, F1Score, precision
+from .metrics import Accuracy, EntropyPrediction, F1Score, Precision
 
 
 class MetricWrapper(nn.Module):
@@ -39,9 +39,9 @@ def _get_metric(self, key):
             case "recall":
                 raise NotImplementedError("Recall score not implemented yet")
             case "precision":
-                return precision()
+                return Precision()
             case "accuracy":
-                raise NotImplementedError("Accuracy score not implemented yet")
+                return Accuracy()
             case _:
                 raise ValueError(f"Metric {key} not supported")
 

utils/metrics/__init__.py

@@ -1,5 +1,6 @@
-__all__ = ["EntropyPrediction", "Recall", "F1Score", "Precision"]
+__all__ = ["EntropyPrediction", "Recall", "F1Score", "Precision", "Accuracy"]
 
+from .accuracy import Accuracy
 from .EntropyPred import EntropyPrediction
 from .F1 import F1Score
 from .precision import Precision

utils/metrics/accuracy.py

@@ -0,0 +1,33 @@
+import torch
+from torch import nn
+
+
+class Accuracy(nn.Module):
+    def __init__(self):
+        super().__init__()
+
+    def forward(self, y_true, y_pred):
+        """
+        Compute the accuracy of the model.
+
+        Parameters
+        ----------
+        y_true : torch.Tensor
+            True labels.
+        y_pred : torch.Tensor
+            Predicted labels.
+
+        Returns
+        -------
+        float
+            Accuracy score.
+        """
+        return (y_true == y_pred).float().mean().item()
+
+
+if __name__ == "__main__":
+    y_true = torch.tensor([0, 3, 2, 3, 4])
+    y_pred = torch.tensor([0, 1, 2, 3, 4])
+
+    accuracy = Accuracy()
+    print(accuracy(y_true, y_pred))