def __init__(self): super(ASPP, self).__init__() in_planes = 2048 dilations = [1, 6, 12, 18] # all aspp module output feature maps with channel 256 self.aspp1 = _ASPPModule(in_planes, planes=256, kernel_size=1, padding=0, dilation=dilations[0]) self.aspp2 = _ASPPModule(in_planes, planes=256, kernel_size=3, padding=dilations[1], dilation=dilations[1]) self.aspp3 = _ASPPModule(in_planes, planes=256, kernel_size=3, padding=dilations[2], dilation=dilations[2]) self.aspp4 = _ASPPModule(in_planes, planes=256, kernel_size=3, padding=dilations[3], dilation=dilations[3]) # perform global average pooling on the last feature map of the backbone # batchsize must be greater than 1, otherwise exception will be thrown in calculating BatchNorm self.global_avg_pool = nn.Sequential(nn.AdaptiveAvgPool2d((1, 1)), nn.Conv2d(in_planes, 256, 1, stride=1, bias=False), nn.BatchNorm2d(256), nn.ReLU()) self.p1 = nn.AdaptiveAvgPool2d(1) self.p2 = nn.Conv2d(in_planes, 256, 1, stride=1, bias=False) self.p3 = nn.BatchNorm2d(256) self.conv1 = nn.Conv2d(1280, 256, 1, bias=False) self.bn1 = nn.BatchNorm2d(256) self.relu = nn.ReLU() self.dropout = nn.Dropout(0.5) self._init_weight()
def __init__(self, in_planes=None, planes=None, stride=1, downsample=None): super(BasicBlock, self).__init__() self.conv1 = conv3x3(in_planes, planes, stride) self.bn1 = nn.BatchNorm2d(planes) self.relu1 = nn.ReLU() self.conv2 = conv3x3(planes, planes) self.bn2 = nn.BatchNorm2d(planes) self.downsample = downsample self.stride = stride self.relu2 = nn.ReLU(inplace=True)
def __init__(self, block, layers, num_classes=10): super(ResNet, self).__init__() self.inplanes = 64 self.initdata = nn.Conv2d(1, 64, kernel_size=7, stride=1, padding=3, bias=False) self.bn0 = nn.BatchNorm2d(64) self.relu0 = nn.ReLU(inplace=True) self.maxpool = nn.MaxPool2d(kernel_size=3, stride=2, padding=1) self.layer1 = self.make_layers(block, 64, layers[0]) self.layer2 = self.make_layers(block, 128, layers[1], stride=1) self.layer3 = self.make_layers(block, 256, layers[2], stride=1) self.layer4 = self.make_layers(block, 512, layers[3], stride=2) self.avg = nn.AvgPool2d(7, stride=1) self.full = nn.Linear(512 * block.expansion, num_classes) self.sigmoid = nn.Sigmoid() for m in self.modules(): if isinstance( m, nn.Conv2d): # isinstance() 函数来判断一个对象是否是一个已知的类型,类似 type()。 init.kaiming_normal_(m.weight, mode='fan_out', nonlinearity='relu') elif isinstance(m, nn.BatchNorm2d): init.constant_(m.weight, 1) init.constant_(m.bias, 0)
def __init__(self, num_classes): super(Decoder, self).__init__() low_level_in_planes = 256 self.conv1 = nn.Conv2d(low_level_in_planes, 48, 1, bias=False) self.bn1 = nn.BatchNorm2d(48) self.relu = nn.ReLU() self.last_conv = nn.Sequential( nn.Conv2d(304, 256, kernel_size=3, stride=1, padding=1, bias=False), nn.BatchNorm2d(256), nn.ReLU(), nn.Dropout(0.5), nn.Conv2d(256, 256, kernel_size=3, stride=1, padding=1, bias=False), nn.BatchNorm2d(256), nn.ReLU(), nn.Dropout(0.1), nn.Conv2d(256, num_classes, kernel_size=1, stride=1)) self._init_weight()
def __init__(self, inplane, plane, stride=1, downsample=None): super(Bottleneck, self).__init__() self.conv1 = nn.Conv2d(inplane, plane, kernel_size=1, bias=False) self.bn1 = nn.BatchNorm2d(plane) self.conv2 = nn.Conv2d(plane, plane, kernel_size=3, padding=1, stride=stride, bias=False) self.bn2 = nn.BatchNorm2d(plane) self.conv3 = nn.Conv2d(plane, self.expansion * plane, kernel_size=1, bias=False) self.bn3 = nn.BatchNorm2d(self.expansion * plane) self.downsample = downsample self.stride = stride self.relu3 = nn.ReLU(inplace=True)
def __init__(self, in_channels, key_channels, out_channels, scale=1, dropout=0.1, bn_type=None): super(SpatialOCR_Module, self).__init__() self.object_context_block = ObjectAttentionBlock(in_channels, key_channels, scale, bn_type) _in_channels = 2 * in_channels self.conv_bn_dropout = nn.Sequential( nn.Conv2d(_in_channels, out_channels, kernel_size=1, padding=0, bias=False), nn.BatchNorm2d(out_channels), nn.ReLU(inplace=True), nn.Dropout2d(dropout) )
def __init__(self, inp_dim, out_dim): """ residual block :param inp_dim: input dimension :param out_dim: output dimension """ super(Residual, self).__init__() # the channel must be at least 1 out_dim_half = max(1, int(out_dim / 2)) self.conv1 = nn.Conv2d(inp_dim, out_dim_half, 1, 1, bias=False) self.bn1 = nn.BatchNorm2d(out_dim_half) self.relu = nn.ReLU() self.conv2 = nn.Conv2d(out_dim_half, out_dim_half, 3, 1, 1, bias=False) self.bn2 = nn.BatchNorm2d(out_dim_half) self.conv3 = nn.Conv2d(out_dim_half, out_dim, 1, 1, bias=False) self.bn3 = nn.BatchNorm2d(out_dim) self.skip_layer = nn.Conv2d(inp_dim, out_dim, 1, 1, bias=False) self.skip_layer_bn = nn.BatchNorm2d(out_dim)
def __init__(self, in_planes, planes, stride=1, downsample=None, dilation=1): super(Bottleneck, self).__init__() self.conv1 = conv1x1(in_planes, planes) self.bn1 = nn.BatchNorm2d(planes) self.conv2 = nn.Conv2d(planes, planes, kernel_size=3, stride=stride, dilation=dilation, padding=dilation, bias=False) self.bn2 = nn.BatchNorm2d(planes) self.conv3 = nn.Conv2d(planes, planes * 4, kernel_size=1, bias=False) self.bn3 = nn.BatchNorm2d(planes * self.expansion) self.relu = nn.ReLU(inplace=True) self.downsample = downsample self.stride = stride
def __init__(self, in_planes, planes, kernel_size, padding, dilation): """ One single ASPP module :param in_planes: input channels :param planes: output channels :param kernel_size: kernel size in conv :param padding: padding :param dilation: dilation """ super(_ASPPModule, self).__init__() self.atrous_conv = nn.Conv2d(in_planes, planes, kernel_size=kernel_size, stride=1, padding=padding, dilation=dilation, bias=False) self.bn = nn.BatchNorm2d(planes) self.relu = nn.ReLU() self._init_weight()
def make_layers(self, block, planes, num_blocks, stride=1): downsample = None layers = [] if stride != 1 or self.inplanes != block.expansion * planes: downsample = nn.Sequential( nn.Conv2d(self.inplanes, block.expansion * planes, kernel_size=1, stride=stride, bias=False), nn.BatchNorm2d(block.expansion * planes)) layers.append( block(self.inplanes, planes, stride=stride, downsample=downsample)) self.inplanes = planes * block.expansion for i in range(1, num_blocks): layers.append(block(self.inplanes, planes)) return nn.Sequential(*layers)
def __init__(self): super().__init__() self.relu = nn.ReLU() self.avgpool2d = nn.AvgPool2d(2, stride=2) #输入部分 self.conv2d_1 = nn.Conv2d(1, 6, kernel_size=5, padding=2) self.batchnorm2d = nn.BatchNorm2d(6) #中间残差块 self.conv2d_2 = nn.Conv2d(6, 6, kernel_size=3, padding=1) #输出部分 self.conv2d_3 = nn.Conv2d(6, 6, 5) self.flatten = nn.Flatten() self.sig = nn.Sigmoid() self.linear_1 = nn.Linear(6 * 5 * 5, 64) self.linear_2 = nn.Linear(64, 10)
def _make_multi_grid_layer(self, block, planes, blocks, stride=1, dilation=1): """ Multi-grid unit :param block: Bottleneck :param planes: :param blocks: :param stride: :param dilation: :return: """ downsample = None if stride != 1 or self.in_planes != planes * block.expansion: downsample = nn.Sequential( nn.Conv2d(self.in_planes, planes * block.expansion, kernel_size=1, stride=stride, bias=False), nn.BatchNorm2d(planes * block.expansion), ) layers = list() layers.append( block(self.in_planes, planes, stride, dilation=blocks[0] * dilation, downsample=downsample)) self.in_planes = planes * block.expansion for i in range(1, len(blocks)): layers.append( block(self.in_planes, planes, stride=1, dilation=blocks[i] * dilation)) return nn.Sequential(*layers)
def __init__(self, in_channels, key_channels, scale=1, bn_type=None): super(ObjectAttentionBlock, self).__init__() self.scale = scale self.in_channels = in_channels self.key_channels = key_channels self.pool = nn.MaxPool2d(kernel_size=(scale, scale)) self.f_pixel = nn.Sequential( nn.Conv2d(in_channels=self.in_channels, out_channels=self.key_channels, kernel_size=1, stride=1, padding=0, bias=False), nn.BatchNorm2d(self.key_channels), nn.ReLU(inplace=True), nn.Conv2d(in_channels=self.key_channels, out_channels=self.key_channels, kernel_size=1, stride=1, padding=0, bias=False), nn.BatchNorm2d(self.key_channels), nn.ReLU(inplace=True) ) self.f_object = nn.Sequential( nn.Conv2d(in_channels=self.in_channels, out_channels=self.key_channels, kernel_size=1, stride=1, padding=0, bias=False), nn.BatchNorm2d(self.key_channels), nn.ReLU(inplace=True), nn.Conv2d(in_channels=self.key_channels, out_channels=self.key_channels, kernel_size=1, stride=1, padding=0, bias=False), nn.BatchNorm2d(self.key_channels), nn.ReLU(inplace=True) ) self.f_down = nn.Sequential( nn.Conv2d(in_channels=self.in_channels, out_channels=self.key_channels, kernel_size=1, stride=1, padding=0, bias=False), nn.BatchNorm2d(self.key_channels), nn.ReLU(inplace=True) ) self.f_up = nn.Sequential( nn.Conv2d(in_channels=self.key_channels, out_channels=self.in_channels, kernel_size=1, stride=1, padding=0, bias=False), nn.BatchNorm2d(self.key_channels), nn.ReLU(inplace=True) )
def __init__(self, num_class=10): super(VGG16, self).__init__() self.feature = modules.Sequential( # #1, modules.Conv2d(3, 64, kernel_size=3, padding=1), modules.BatchNorm2d(64), modules.ReLU(True), #2 modules.Conv2d(64, 64, kernel_size=3, padding=1), modules.BatchNorm2d(64), modules.ReLU(True), modules.MaxPool2d(kernel_size=2, stride=2), #3 modules.Conv2d(64, 128, kernel_size=3, padding=1), modules.BatchNorm2d(128), modules.ReLU(True), # modules.MaxPool2d(kernel_size=2,stride=2), #4 modules.Conv2d(128, 128, kernel_size=3, padding=1), modules.BatchNorm2d(128), modules.ReLU(True), modules.MaxPool2d(kernel_size=2, stride=2), #5 modules.Conv2d(128, 256, kernel_size=3, padding=1), modules.BatchNorm2d(256), modules.ReLU(True), #6 modules.Conv2d(256, 256, kernel_size=3, padding=1), modules.BatchNorm2d(256), modules.ReLU(True), #7 modules.Conv2d(256, 256, kernel_size=3, padding=1), modules.BatchNorm2d(256), modules.ReLU(True), modules.MaxPool2d(kernel_size=2, stride=2), #8 modules.Conv2d(256, 512, kernel_size=3, padding=1), modules.BatchNorm2d(512), modules.ReLU(True), #9 modules.Conv2d(512, 512, kernel_size=3, padding=1), modules.BatchNorm2d(512), modules.ReLU(True), #10 modules.Conv2d(512, 512, kernel_size=3, padding=1), modules.BatchNorm2d(512), modules.ReLU(True), modules.MaxPool2d(kernel_size=2, stride=2), #11 modules.Conv2d(512, 512, kernel_size=3, padding=1), modules.BatchNorm2d(512), modules.ReLU(True), #12 modules.Conv2d(512, 512, kernel_size=3, padding=1), modules.BatchNorm2d(512), modules.ReLU(True), #13 modules.Conv2d(512, 512, kernel_size=3, padding=1), modules.BatchNorm2d(512), modules.ReLU(True), modules.MaxPool2d(kernel_size=2, stride=2), modules.AvgPool2d(kernel_size=1, stride=1), ) # 全连接层 self.classifier = modules.Sequential( # #14 modules.Linear(512, 4096), modules.ReLU(True), modules.Dropout(), #15 modules.Linear(4096, 4096), modules.ReLU(True), modules.Dropout(), #16 modules.Linear(4096, num_class), )