Class EfficientNet

models/networks/pose_efficientNet.py:149–696

EfficientNet model. Most easily loaded with the .from_name or .from_pretrained methods. Args: blocks_args (list[namedtuple]): A list of BlockArgs to construct blocks. global_params (namedtuple): A set of GlobalParams shared between blocks. References: [1] https

@MODELS.register_module()
class EfficientNet(nn.Module):
    """EfficientNet model.
       Most easily loaded with the .from_name or .from_pretrained methods.
    Args:
        blocks_args (list[namedtuple]): A list of BlockArgs to construct blocks.
        global_params (namedtuple): A set of GlobalParams shared between blocks.
    References:
        [1] https://arxiv.org/abs/1905.11946 (EfficientNet)
    Example:
        >>> import torch
        >>> from efficientnet.model import EfficientNet
        >>> inputs = torch.rand(1, 3, 224, 224)
        >>> model = EfficientNet.from_pretrained('efficientnet-b0')
        >>> model.eval()
        >>> outputs = model(inputs)
    """

    def __init__(self, blocks_args=None, global_params=None):
        super().__init__()
        assert isinstance(blocks_args, list), 'blocks_args should be a list'
        assert len(blocks_args) > 0, 'block args must be greater than 0'
        self._global_params = global_params
        self._blocks_args = blocks_args

        # Batch norm parameters
        bn_mom = 1 - self._global_params.batch_norm_momentum
        bn_eps = self._global_params.batch_norm_epsilon

        # Get stem static or dynamic convolution depending on image size
        image_size = global_params.image_size
        Conv2d = get_same_padding_conv2d(image_size=image_size)

        # Stem
        in_channels = 3  # rgb
        out_channels = round_filters(32, self._global_params)  # number of output channels
        self._conv_stem = Conv2d(in_channels, out_channels, kernel_size=3, stride=2, bias=False)
        self._bn0 = nn.BatchNorm2d(num_features=out_channels, momentum=bn_mom, eps=bn_eps)
        image_size = calculate_output_image_size(image_size, 2)

        # Build blocks
        self._blocks = nn.ModuleList([])
        for block_args in self._blocks_args:

            # Update block input and output filters based on depth multiplier.
            block_args = block_args._replace(
                input_filters=round_filters(block_args.input_filters, self._global_params),
                output_filters=round_filters(block_args.output_filters, self._global_params),
                num_repeat=round_repeats(block_args.num_repeat, self._global_params)
            )

            # The first block needs to take care of stride and filter size increase.
            self._blocks.append(MBConvBlock(block_args, self._global_params, image_size=image_size))
            image_size = calculate_output_image_size(image_size, block_args.stride)
            if block_args.num_repeat > 1:  # modify block_args to keep same output size
                block_args = block_args._replace(input_filters=block_args.output_filters, stride=1)
            for _ in range(block_args.num_repeat - 1):
                self._blocks.append(MBConvBlock(block_args, self._global_params, image_size=image_size))
                # image_size = calculate_output_image_size(image_size, block_args.stride)  # stride = 1