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# Copyright (c) Facebook, Inc. and its affiliates.
from detectron2.utils.registry import Registry
PROPOSAL_GENERATOR_REGISTRY = Registry("PROPOSAL_GENERATOR")
PROPOSAL_GENERATOR_REGISTRY.__doc__ = """
Registry for proposal generator, which produces object proposals from feature maps.
The registered object will be called with `obj(cfg, input_shape)`.
The call should return a `nn.Module` object.
"""
from . import rpn, rrpn # noqa F401 isort:skip
def build_proposal_generator(cfg, input_shape):
"""
Build a proposal generator from `cfg.MODEL.PROPOSAL_GENERATOR.NAME`.
The name can be "PrecomputedProposals" to use no proposal generator.
"""
name = cfg.MODEL.PROPOSAL_GENERATOR.NAME
if name == "PrecomputedProposals":
return None
return PROPOSAL_GENERATOR_REGISTRY.get(name)(cfg, input_shape)
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