base

BaseNetworkBuilder(features_extractor, pre_classifier=nn.Identity(), classifier=nn.Identity(), freeze=True, hyperspherical=False, flatten_features=True)

Bases: Module

Baseline Feature Extractor, with the possibility to map features to an hypersphere. If hypershperical is True the classifier is ignored.

Parameters:

• features_extractor (Module) –

  Feature extractor as a toch.nn.Module.

• pre_classifier (Module, default: Identity() ) –

  Pre classifier as a torch.nn.Module. Defaults to nn.Identity().

• classifier (Module, default: Identity() ) –

  Classifier as a torch.nn.Module. Defaults to nn.Identity().

• freeze (bool, default: True ) –

  Whether to freeze the feature extractor. Defaults to True.

• hyperspherical (bool, default: False ) –

  Whether to map features to an hypersphere. Defaults to False.

• flatten_features (bool, default: True ) –

  Whether to flatten the features before the pre_classifier. May be required if your model is outputting a feature map rather than a vector. Defaults to True.

Source code in quadra/models/classification/base.py

def __init__(
    self,
    features_extractor: nn.Module,
    pre_classifier: nn.Module = nn.Identity(),
    classifier: nn.Module = nn.Identity(),
    freeze: bool = True,
    hyperspherical: bool = False,
    flatten_features: bool = True,
):
    super().__init__()
    self.features_extractor = features_extractor
    self.freeze = freeze
    self.hyperspherical = hyperspherical
    self.pre_classifier = pre_classifier
    self.classifier = classifier
    self.flatten: bool = False
    self._hyperspherical: bool = False
    self.l2: Optional[L2Norm] = None
    self.flatten_features = flatten_features

    self.freeze = freeze
    self.hyperspherical = hyperspherical

    if self.freeze:
        for p in self.features_extractor.parameters():
            p.requires_grad = False

freeze: bool property writable

Whether to freeze the feature extractor.

hyperspherical: bool property writable

Whether to map the extracted features into an hypersphere.