diff --git a/timm/models/selecsls.py b/timm/models/selecsls.py index b7f2a9f0..ef9b85dd 100644 --- a/timm/models/selecsls.py +++ b/timm/models/selecsls.py @@ -53,60 +53,30 @@ default_cfgs = { } -def conv_bn(inp, oup, stride): +def conv_bn(in_chs, out_chs, k=3, stride=1, padding=None, dilation=1): + if padding is None: + padding = ((stride - 1) + dilation * (k - 1)) // 2 return nn.Sequential( - nn.Conv2d(inp, oup, 3, stride, 1, bias=False), - nn.BatchNorm2d(oup), - nn.ReLU(inplace=True) - ) - - -def conv_1x1_bn(inp, oup): - return nn.Sequential( - nn.Conv2d(inp, oup, 1, 1, 0, bias=False), - nn.BatchNorm2d(oup), + nn.Conv2d(in_chs, out_chs, k, stride, padding=padding, dilation=dilation, bias=False), + nn.BatchNorm2d(out_chs), nn.ReLU(inplace=True) ) class SelecSLSBlock(nn.Module): - def __init__(self, inp, skip, k, oup, is_first, stride): + def __init__(self, in_chs, skip_chs, mid_chs, out_chs, is_first, stride, dilation=1): super(SelecSLSBlock, self).__init__() self.stride = stride self.is_first = is_first assert stride in [1, 2] # Process input with 4 conv blocks with the same number of input and output channels - self.conv1 = nn.Sequential( - nn.Conv2d(inp, k, 3, stride, 1, groups=1, bias=False, dilation=1), - nn.BatchNorm2d(k), - nn.ReLU(inplace=True) - ) - self.conv2 = nn.Sequential( - nn.Conv2d(k, k, 1, 1, 0, groups=1, bias=False, dilation=1), - nn.BatchNorm2d(k), - nn.ReLU(inplace=True) - ) - self.conv3 = nn.Sequential( - nn.Conv2d(k, k // 2, 3, 1, 1, groups=1, bias=False, dilation=1), - nn.BatchNorm2d(k // 2), - nn.ReLU(inplace=True) - ) - self.conv4 = nn.Sequential( - nn.Conv2d(k // 2, k, 1, 1, 0, groups=1, bias=False, dilation=1), - nn.BatchNorm2d(k), - nn.ReLU(inplace=True) - ) - self.conv5 = nn.Sequential( - nn.Conv2d(k, k // 2, 3, 1, 1, groups=1, bias=False, dilation=1), - nn.BatchNorm2d(k // 2), - nn.ReLU(inplace=True) - ) - self.conv6 = nn.Sequential( - nn.Conv2d(2 * k + (0 if is_first else skip), oup, 1, 1, 0, groups=1, bias=False, dilation=1), - nn.BatchNorm2d(oup), - nn.ReLU(inplace=True) - ) + self.conv1 = conv_bn(in_chs, mid_chs, 3, stride, dilation=dilation) + self.conv2 = conv_bn(mid_chs, mid_chs, 1) + self.conv3 = conv_bn(mid_chs, mid_chs // 2, 3) + self.conv4 = conv_bn(mid_chs // 2, mid_chs, 1) + self.conv5 = conv_bn(mid_chs, mid_chs // 2, 3) + self.conv6 = conv_bn(2 * mid_chs + (0 if is_first else skip_chs), out_chs, 1) def forward(self, x): assert isinstance(x, list) @@ -127,8 +97,7 @@ class SelecSLS(nn.Module): Parameters ---------- - cfg : network config - String indicating the network config + cfg : network config dictionary specifying block type, feature, and head args num_classes : int, default 1000 Number of classification classes. in_chans : int, default 3 @@ -139,134 +108,16 @@ class SelecSLS(nn.Module): Global pooling type. One of 'avg', 'max', 'avgmax', 'catavgmax' """ - def __init__(self, cfg='selecsls60', num_classes=1000, in_chans=3, - drop_rate=0.0, global_pool='avg'): + def __init__(self, cfg, num_classes=1000, in_chans=3, drop_rate=0.0, global_pool='avg'): self.num_classes = num_classes self.drop_rate = drop_rate super(SelecSLS, self).__init__() - self.stem = conv_bn(in_chans, 32, 2) - # Core Network - self.features = [] - if cfg == 'selecsls42': - self.block = SelecSLSBlock - # Define configuration of the network after the initial neck - self.selecsls_config = [ - # inp,skip, k, oup, is_first, stride - [32, 0, 64, 64, True, 2], - [64, 64, 64, 128, False, 1], - [128, 0, 144, 144, True, 2], - [144, 144, 144, 288, False, 1], - [288, 0, 304, 304, True, 2], - [304, 304, 304, 480, False, 1], - ] - # Head can be replaced with alternative configurations depending on the problem - self.head = nn.Sequential( - conv_bn(480, 960, 2), - conv_bn(960, 1024, 1), - conv_bn(1024, 1024, 2), - conv_1x1_bn(1024, 1280), - ) - self.num_features = 1280 - elif cfg == 'selecsls42b': - self.block = SelecSLSBlock - # Define configuration of the network after the initial neck - self.selecsls_config = [ - # inp,skip, k, oup, is_first, stride - [32, 0, 64, 64, True, 2], - [64, 64, 64, 128, False, 1], - [128, 0, 144, 144, True, 2], - [144, 144, 144, 288, False, 1], - [288, 0, 304, 304, True, 2], - [304, 304, 304, 480, False, 1], - ] - # Head can be replaced with alternative configurations depending on the problem - self.head = nn.Sequential( - conv_bn(480, 960, 2), - conv_bn(960, 1024, 1), - conv_bn(1024, 1280, 2), - conv_1x1_bn(1280, 1024), - ) - self.num_features = 1024 - elif cfg == 'selecsls60': - self.block = SelecSLSBlock - # Define configuration of the network after the initial neck - self.selecsls_config = [ - # inp,skip, k, oup, is_first, stride - [32, 0, 64, 64, True, 2], - [64, 64, 64, 128, False, 1], - [128, 0, 128, 128, True, 2], - [128, 128, 128, 128, False, 1], - [128, 128, 128, 288, False, 1], - [288, 0, 288, 288, True, 2], - [288, 288, 288, 288, False, 1], - [288, 288, 288, 288, False, 1], - [288, 288, 288, 416, False, 1], - ] - # Head can be replaced with alternative configurations depending on the problem - self.head = nn.Sequential( - conv_bn(416, 756, 2), - conv_bn(756, 1024, 1), - conv_bn(1024, 1024, 2), - conv_1x1_bn(1024, 1280), - ) - self.num_features = 1280 - elif cfg == 'selecsls60b': - self.block = SelecSLSBlock - # Define configuration of the network after the initial neck - self.selecsls_config = [ - # inp,skip, k, oup, is_first, stride - [32, 0, 64, 64, True, 2], - [64, 64, 64, 128, False, 1], - [128, 0, 128, 128, True, 2], - [128, 128, 128, 128, False, 1], - [128, 128, 128, 288, False, 1], - [288, 0, 288, 288, True, 2], - [288, 288, 288, 288, False, 1], - [288, 288, 288, 288, False, 1], - [288, 288, 288, 416, False, 1], - ] - # Head can be replaced with alternative configurations depending on the problem - self.head = nn.Sequential( - conv_bn(416, 756, 2), - conv_bn(756, 1024, 1), - conv_bn(1024, 1280, 2), - conv_1x1_bn(1280, 1024), - ) - self.num_features = 1024 - elif cfg == 'selecsls84': - self.block = SelecSLSBlock - # Define configuration of the network after the initial neck - self.selecsls_config = [ - # inp,skip, k, oup, is_first, stride - [32, 0, 64, 64, True, 2], - [64, 64, 64, 144, False, 1], - [144, 0, 144, 144, True, 2], - [144, 144, 144, 144, False, 1], - [144, 144, 144, 144, False, 1], - [144, 144, 144, 144, False, 1], - [144, 144, 144, 304, False, 1], - [304, 0, 304, 304, True, 2], - [304, 304, 304, 304, False, 1], - [304, 304, 304, 304, False, 1], - [304, 304, 304, 304, False, 1], - [304, 304, 304, 304, False, 1], - [304, 304, 304, 512, False, 1], - ] - # Head can be replaced with alternative configurations depending on the problem - self.head = nn.Sequential( - conv_bn(512, 960, 2), - conv_bn(960, 1024, 1), - conv_bn(1024, 1024, 2), - conv_1x1_bn(1024, 1280), - ) - self.num_features = 1280 - else: - raise ValueError('Invalid net configuration ' + cfg + ' !!!') + self.stem = conv_bn(in_chans, 32, stride=2) + self.features = nn.Sequential(*[cfg['block'](*block_args) for block_args in cfg['features']]) + self.head = nn.Sequential(*[conv_bn(*conv_args) for conv_args in cfg['head']]) + self.num_features = cfg['num_features'] - for inp, skip, k, oup, is_first, stride in self.selecsls_config: - self.features.append(self.block(inp, skip, k, oup, is_first, stride)) - self.features = nn.Sequential(*self.features) self.global_pool = SelectAdaptivePool2d(pool_type=global_pool) self.fc = nn.Linear(self.num_features * self.global_pool.feat_mult(), num_classes) @@ -289,84 +140,155 @@ class SelecSLS(nn.Module): else: self.fc = None - def forward_features(self, x, pool=True): + def forward_features(self, x): x = self.stem(x) x = self.features([x]) x = self.head(x[0]) - - if pool: - x = self.global_pool(x) - x = x.view(x.size(0), -1) return x def forward(self, x): x = self.forward_features(x) + x = self.global_pool(x).flatten(1) if self.drop_rate > 0.: x = F.dropout(x, p=self.drop_rate, training=self.training) x = self.fc(x) return x +def _create_model(variant, pretrained, model_kwargs): + cfg = {} + if variant.startswith('selecsls42'): + cfg['block'] = SelecSLSBlock + # Define configuration of the network after the initial neck + cfg['features'] = [ + # in_chs, skip_chs, mid_chs, out_chs, is_first, stride + (32, 0, 64, 64, True, 2), + (64, 64, 64, 128, False, 1), + (128, 0, 144, 144, True, 2), + (144, 144, 144, 288, False, 1), + (288, 0, 304, 304, True, 2), + (304, 304, 304, 480, False, 1), + ] + # Head can be replaced with alternative configurations depending on the problem + if variant == 'selecsls42b': + cfg['head'] = [ + (480, 960, 3, 2), + (960, 1024, 3, 1), + (1024, 1280, 3, 2), + (1280, 1024, 1, 1), + ] + cfg['num_features'] = 1024 + else: + cfg['head'] = [ + (480, 960, 3, 2), + (960, 1024, 3, 1), + (1024, 1024, 3, 2), + (1024, 1280, 1, 1), + ] + cfg['num_features'] = 1280 + elif variant.startswith('selecsls60'): + cfg['block'] = SelecSLSBlock + # Define configuration of the network after the initial neck + cfg['features'] = [ + # in_chs, skip_chs, mid_chs, out_chs, is_first, stride + (32, 0, 64, 64, True, 2), + (64, 64, 64, 128, False, 1), + (128, 0, 128, 128, True, 2), + (128, 128, 128, 128, False, 1), + (128, 128, 128, 288, False, 1), + (288, 0, 288, 288, True, 2), + (288, 288, 288, 288, False, 1), + (288, 288, 288, 288, False, 1), + (288, 288, 288, 416, False, 1), + ] + # Head can be replaced with alternative configurations depending on the problem + if variant == 'selecsls60b': + cfg['head'] = [ + (416, 756, 3, 2), + (756, 1024, 3, 1), + (1024, 1280, 3, 2), + (1280, 1024, 1, 1), + ] + cfg['num_features'] = 1024 + else: + cfg['head'] = [ + (416, 756, 3, 2), + (756, 1024, 3, 1), + (1024, 1024, 3, 2), + (1024, 1280, 1, 1), + ] + cfg['num_features'] = 1280 + elif variant == 'selecsls84': + cfg['block'] = SelecSLSBlock + # Define configuration of the network after the initial neck + cfg['features'] = [ + # in_chs, skip_chs, mid_chs, out_chs, is_first, stride + (32, 0, 64, 64, True, 2), + (64, 64, 64, 144, False, 1), + (144, 0, 144, 144, True, 2), + (144, 144, 144, 144, False, 1), + (144, 144, 144, 144, False, 1), + (144, 144, 144, 144, False, 1), + (144, 144, 144, 304, False, 1), + (304, 0, 304, 304, True, 2), + (304, 304, 304, 304, False, 1), + (304, 304, 304, 304, False, 1), + (304, 304, 304, 304, False, 1), + (304, 304, 304, 304, False, 1), + (304, 304, 304, 512, False, 1), + ] + # Head can be replaced with alternative configurations depending on the problem + cfg['head'] = [ + (512, 960, 3, 2), + (960, 1024, 3, 1), + (1024, 1024, 3, 2), + (1024, 1280, 3, 1), + ] + cfg['num_features'] = 1280 + else: + raise ValueError('Invalid net configuration ' + variant + ' !!!') + + model = SelecSLS(cfg, **model_kwargs) + model.default_cfg = default_cfgs[variant] + if pretrained: + load_pretrained( + model, + num_classes=model_kwargs.get('num_classes', 0), + in_chans=model_kwargs.get('in_chans', 3), + strict=True) + return model + + @register_model -def selecsls42(pretrained=False, num_classes=1000, in_chans=3, **kwargs): +def selecsls42(pretrained=False, **kwargs): """Constructs a SelecSLS42 model. """ - default_cfg = default_cfgs['selecsls42'] - model = SelecSLS( - cfg='selecsls42', num_classes=1000, in_chans=3, **kwargs) - model.default_cfg = default_cfg - if pretrained: - load_pretrained(model, default_cfg, num_classes, in_chans) - return model + return _create_model('selecsls42', pretrained, kwargs) @register_model -def selecsls42b(pretrained=False, num_classes=1000, in_chans=3, **kwargs): +def selecsls42b(pretrained=False, **kwargs): """Constructs a SelecSLS42_B model. """ - default_cfg = default_cfgs['selecsls42b'] - model = SelecSLS( - cfg='selecsls42b', num_classes=1000, in_chans=3, **kwargs) - model.default_cfg = default_cfg - if pretrained: - load_pretrained(model, default_cfg, num_classes, in_chans) - return model + return _create_model('selecsls42b', pretrained, kwargs) @register_model -def selecsls60(pretrained=False, num_classes=1000, in_chans=3, **kwargs): +def selecsls60(pretrained=False, **kwargs): """Constructs a SelecSLS60 model. """ - default_cfg = default_cfgs['selecsls60'] - model = SelecSLS( - cfg='selecsls60', num_classes=1000, in_chans=3, **kwargs) - model.default_cfg = default_cfg - if pretrained: - load_pretrained(model, default_cfg, num_classes, in_chans) - return model + return _create_model('selecsls60', pretrained, kwargs) @register_model -def selecsls60b(pretrained=False, num_classes=1000, in_chans=3, **kwargs): +def selecsls60b(pretrained=False, **kwargs): """Constructs a SelecSLS60_B model. """ - default_cfg = default_cfgs['selecsls60b'] - model = SelecSLS( - cfg='selecsls60b', num_classes=1000, in_chans=3, **kwargs) - model.default_cfg = default_cfg - if pretrained: - load_pretrained(model, default_cfg, num_classes, in_chans) - return model + return _create_model('selecsls60b', pretrained, kwargs) @register_model -def selecsls84(pretrained=False, num_classes=1000, in_chans=3, **kwargs): +def selecsls84(pretrained=False, **kwargs): """Constructs a SelecSLS84 model. """ - default_cfg = default_cfgs['selecsls84'] - model = SelecSLS( - cfg='selecsls84', num_classes=1000, in_chans=3, **kwargs) - model.default_cfg = default_cfg - if pretrained: - load_pretrained(model, default_cfg, num_classes, in_chans) - return model + return _create_model('selecsls84', pretrained, kwargs)