Merge branch 'main' into add-ruff

Author: MechaCritter

pyvisim/_base_classes.py

@@ -4,7 +4,6 @@
 
 import numpy as np
 
-from ._utils import is_numpy_image
 
 
 class SimilarityMetric(abc.ABC):
@@ -51,7 +50,6 @@ def __call__(self, image: np.ndarray):
         :param image: Input image (NumPy array).
         :return: Feature descriptors (NumPy array).
         """
-        is_numpy_image(image, 0)
         pass
 
     @property

pyvisim/encoders/vlad.py

@@ -101,10 +101,7 @@ def encode(self, images: Iterable[np.ndarray] | np.ndarray) -> np.ndarray:
                 descriptors = self.pca.transform(descriptors.astype(np.float32))
 
             if descriptors is None or descriptors.shape[0] == 0:
-                return np.zeros(
-                    len(self.clustering_model.cluster_centers_) * descriptors.shape[1],
-                    dtype=np.float32,
-                )
+                raise ValueError("No descriptors found in the image. Cannot compute VLAD encoding.")
 
             labels = self.clustering_model.predict(descriptors.astype(np.float32))
             centroids = self.clustering_model.cluster_centers_