def __init__(self,
in_channels: int,
out_channels: int,
kernel_size: _SIZE_,
stride: _SIZE_ = 1,
padding: _SIZE_ = 0,
dilation: _SIZE_ = 1,
groups: int = 1,
bias: bool = True,
alpha_out: float = 0.5,
activations: Optional[nn.Module] = nn.ReLU(True)):
super(OctConvInBlock, self).__init__()
h_out_channels = int((1 - alpha_out) * out_channels)
l_out_channels = int(alpha_out * out_channels)
self.h2h_conv: nn.Module = build_basic_block(in_channels,
h_out_channels,
kernel_size, stride,
padding, dilation, groups,
bias, None)
self.h2l_conv: nn.Module = build_basic_block(in_channels,
l_out_channels,
kernel_size, stride,
padding, dilation, groups,
bias, None)
self.activations: Optional[nn.Module] = activations
def __init__(self, in_channels: int, out_channels: int):
super(DarkNetResBlock, self).__init__()
mid_channels = in_channels // 2
self.block_1 = build_basic_block(in_channels,
mid_channels,
kernel_size=1,
stride=1,
padding=0,
activations=nn.LeakyReLU())
self.block_2 = build_basic_block(mid_channels,
out_channels,
kernel_size=3,
stride=1,
padding=1,
activations=nn.LeakyReLU())
def __init__(self, in_channels, num_cla):
super(YOLOV3Head, self).__init__()
mid_channels = in_channels * 2
self.block = build_basic_block(in_channels,
mid_channels,
3,
1,
1,
activations=nn.LeakyReLU(inplace=True))
self.head = nn.Conv2d(mid_channels, (5 + num_cla) * 3, 1, 1, 0)
def __init__(self, in_channels: int, out_channels: int, end=False):
super(YOLOV3Layer, self).__init__()
mid_channels_1 = out_channels * 2
mid_channels_2 = out_channels * 4
self.block_extract = nn.Sequential(
build_basic_block(in_channels,
mid_channels_1,
1,
1,
0,
activations=nn.LeakyReLU(inplace=True)),
build_basic_block(mid_channels_1,
mid_channels_2,
3,
1,
1,
activations=nn.LeakyReLU(inplace=True)),
build_basic_block(mid_channels_2,
mid_channels_1,
1,
1,
0,
activations=nn.LeakyReLU(inplace=True)),
build_basic_block(mid_channels_1,
mid_channels_2,
3,
1,
1,
activations=nn.LeakyReLU(inplace=True)),
build_basic_block(mid_channels_2,
mid_channels_1,
1,
1,
0,
activations=nn.LeakyReLU(inplace=True)),
)
self.block_smooth: Optional[nn.Module] = None
if not end:
self.block_smooth = build_basic_block(
mid_channels_1,
out_channels,
1,
1,
0,
activations=nn.LeakyReLU(inplace=True))
self.init_params()
def __init__(self,
in_channels: int,
config: _CONFIG_,
activations: Optional[nn.Module] = nn.LeakyReLU()):
super(DarkNet53, self).__init__()
self.channel = in_channels
self.activations = activations
self.block_1 = build_basic_block(self.channel,
32,
3,
1,
1,
activations=self.activations)
self.channel = 32
self.block_2 = self.build_res_block_layer(config[0])
self.block_3 = self.build_res_block_layer(config[1])
self.block_4 = self.build_res_block_layer(config[2])
self.block_5 = self.build_res_block_layer(config[3])
self.block_6 = self.build_res_block_layer(config[4])
def make_baisc_conv_block_layer(self, config: _CONFIG_) -> nn.Sequential:
channels: List[int] = config['channels']
kernel_sizes: List[_SIZE_] = config['kernel_sizes']
strides: List[_SIZE_] = config['stride']
paddings: List[_SIZE_] = config['paddings']
dilations: List[int] = config['dilations']
groups: List[int] = config['groups']
biases: List[bool] = config['biases']
layers: List[nn.Module] = []
for channel, kernel_size, stride, padding, dilation, group, bias in zip(
channels, kernel_sizes, strides, paddings, dilations, groups,
biases):
layers.append(
build_basic_block(self.channel, channel, kernel_size, stride,
padding, dilation, group, bias,
self.activations))
self.channel = channel
return nn.Sequential(*layers)
def build_res_block_layer(self, config: _CONFIG_):
channels: List[int] = config['channels']
kernel_sizes: List[_SIZE_] = config['kernel_sizes']
strides: List[_SIZE_] = config['stride']
paddings: List[_SIZE_] = config['paddings']
dilations: List[int] = config['dilations']
groups: List[int] = config['groups']
biases: List[bool] = config['biases']
layers: List[nn.Module] = [
build_basic_block(self.channel, channels[0], kernel_sizes[0],
strides[0], paddings[0], dilations[0], groups[0],
biases[0], self.activations)
]
self.channel = channels[0]
for channel in channels[1:]:
layers.append(DarkNetResBlock(self.channel, channel))
self.channel = channel
return nn.Sequential(*layers)