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DaGAN
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import torch
import torch.nn as nn
import torch.nn.functional as F
import pdb

class attention1d(nn.Module):
    def __init__(self, in_planes, ratios, K, temperature, init_weight=True):
        super(attention1d, self).__init__()
        assert temperature%3==1
        self.avgpool = nn.AdaptiveAvgPool1d(1)
        if in_planes!=3:
            hidden_planes = int(in_planes*ratios)+1
        else:
            hidden_planes = K
        self.fc1 = nn.Conv1d(in_planes, hidden_planes, 1, bias=False)
        # self.bn = nn.BatchNorm2d(hidden_planes)
        self.fc2 = nn.Conv1d(hidden_planes, K, 1, bias=True)
        self.temperature = temperature
        if init_weight:
            self._initialize_weights()


    def _initialize_weights(self):
        for m in self.modules():
            if isinstance(m, nn.Conv1d):
                nn.init.kaiming_normal_(m.weight, mode='fan_out', nonlinearity='relu')
                if m.bias is not None:
                    nn.init.constant_(m.bias, 0)
            if isinstance(m ,nn.BatchNorm2d):
                nn.init.constant_(m.weight, 1)
                nn.init.constant_(m.bias, 0)

    def updata_temperature(self):
        if self.temperature!=1:
            self.temperature -=3
            print('Change temperature to:', str(self.temperature))


    def forward(self, x):
        x = self.avgpool(x)
        x = self.fc1(x)
        x = F.relu(x)
        x = self.fc2(x).view(x.size(0), -1)
        return F.softmax(x/self.temperature, 1)


class Dynamic_conv1d(nn.Module):
    def __init__(self, in_planes, out_planes, kernel_size, ratio=0.25, stride=1, padding=0, dilation=1, groups=1, bias=True, K=4,temperature=34, init_weight=True):
        super(Dynamic_conv1d, self).__init__()
        assert in_planes%groups==0
        self.in_planes = in_planes
        self.out_planes = out_planes
        self.kernel_size = kernel_size
        self.stride = stride
        self.padding = padding
        self.dilation = dilation
        self.groups = groups
        self.bias = bias
        self.K = K
        self.attention = attention1d(in_planes, ratio, K, temperature)

        self.weight = nn.Parameter(torch.randn(K, out_planes, in_planes//groups, kernel_size), requires_grad=True)
        if bias:
            self.bias = nn.Parameter(torch.Tensor(K, out_planes))
        else:
            self.bias = None
        if init_weight:
            self._initialize_weights()

        #TODO 初始化
    def _initialize_weights(self):
        for i in range(self.K):
            nn.init.kaiming_uniform_(self.weight[i])


    def update_temperature(self):
        self.attention.updata_temperature()

    def forward(self, x):#将batch视作维度变量，进行组卷积，因为组卷积的权重是不同的，动态卷积的权重也是不同的
        softmax_attention = self.attention(x)
        batch_size, in_planes, height = x.size()
        x = x.view(1, -1, height, )# 变化成一个维度进行组卷积
        weight = self.weight.view(self.K, -1)

        # 动态卷积的权重的生成， 生成的是batch_size个卷积参数（每个参数不同）
        aggregate_weight = torch.mm(softmax_attention, weight).view(-1, self.in_planes, self.kernel_size,)
        if self.bias is not None:
            aggregate_bias = torch.mm(softmax_attention, self.bias).view(-1)
            output = F.conv1d(x, weight=aggregate_weight, bias=aggregate_bias, stride=self.stride, padding=self.padding,
                              dilation=self.dilation, groups=self.groups*batch_size)
        else:
            output = F.conv1d(x, weight=aggregate_weight, bias=None, stride=self.stride, padding=self.padding,
                              dilation=self.dilation, groups=self.groups * batch_size)

        output = output.view(batch_size, self.out_planes, output.size(-1))
        return output



class attention2d(nn.Module):
    def __init__(self, in_planes, ratios, K, temperature, init_weight=True):
        super(attention2d, self).__init__()
        assert temperature%3==1
        self.avgpool = nn.AdaptiveAvgPool2d(1)
        if in_planes!=3:
            hidden_planes = int(in_planes*ratios)+1
        else:
            hidden_planes = K
        self.fc1 = nn.Conv2d(in_planes, hidden_planes, 1, bias=False)
        # self.bn = nn.BatchNorm2d(hidden_planes)
        self.fc2 = nn.Conv2d(hidden_planes, K, 1, bias=True)
        self.temperature = temperature
        if init_weight:
            self._initialize_weights()


    def _initialize_weights(self):
        for m in self.modules():
            if isinstance(m, nn.Conv2d):
                nn.init.kaiming_normal_(m.weight, mode='fan_out', nonlinearity='relu')
                if m.bias is not None:
                    nn.init.constant_(m.bias, 0)
            if isinstance(m ,nn.BatchNorm2d):
                nn.init.constant_(m.weight, 1)
                nn.init.constant_(m.bias, 0)

    def updata_temperature(self):
        if self.temperature!=1:
            self.temperature -=3
            print('Change temperature to:', str(self.temperature))


    def forward(self, x):
        x = self.avgpool(x)
        x = self.fc1(x)
        x = F.relu(x)
        x = self.fc2(x).view(x.size(0), -1)
        return F.softmax(x/self.temperature, 1)


class Dynamic_deepwise_conv2d(nn.Module):
    def __init__(self, in_planes, out_planes, kernel_size, ratio=0.25, stride=1, padding=0, dilation=1, groups=1, bias=True, K=4,temperature=34, init_weight=True):
        super(Dynamic_deepwise_conv2d, self).__init__()
        assert in_planes%groups==0
        self.in_planes = in_planes
        self.out_planes = out_planes
        self.kernel_size = kernel_size
        self.stride = stride
        self.padding = padding
        self.dilation = dilation
        self.groups = groups
        self.bias = bias
        self.K = K
        self.attention = attention2d(in_planes, ratio, K, temperature)

        self.weight = nn.Parameter(torch.randn(K, out_planes, in_planes//groups, kernel_size, kernel_size), requires_grad=True)
        if bias:
            self.bias = nn.Parameter(torch.Tensor(K, out_planes))
        else:
            self.bias = None
        if init_weight:
            self._initialize_weights()

        #TODO 初始化
    def _initialize_weights(self):
        for i in range(self.K):
            nn.init.kaiming_uniform_(self.weight[i])


    def update_temperature(self):
        self.attention.updata_temperature()

    def forward(self, x, y):#将batch视作维度变量，进行组卷积，因为组卷积的权重是不同的，动态卷积的权重也是不同的
        softmax_attention = self.attention(x)
        batch_size, in_planes, height, width = x.size()
        y = y.view(1, -1, height, width)# 变化成一个维度进行组卷积
        weight = self.weight.view(self.K, -1)

        # 动态卷积的权重的生成， 生成的是batch_size个卷积参数（每个参数不同）
        aggregate_weight = torch.mm(softmax_attention, weight).view(-1, 1, self.kernel_size, self.kernel_size)
        if self.bias is not None:
            aggregate_bias = torch.mm(softmax_attention, self.bias).view(-1)
            output = F.conv2d(y, weight=aggregate_weight, bias=aggregate_bias, stride=self.stride, padding=self.padding,
                              dilation=self.dilation, groups=self.groups*batch_size)
        else:
            output = F.conv2d(y, weight=aggregate_weight, bias=None, stride=self.stride, padding=self.padding,
                              dilation=self.dilation, groups=self.groups * batch_size)

        output = output.view(batch_size, self.out_planes, output.size(-2), output.size(-1))
        return output

class Dynamic_conv2d(nn.Module):
    def __init__(self, in_planes, out_planes, kernel_size, ratio=0.25, stride=1, padding=0, dilation=1, groups=1, bias=True, K=4,temperature=34, init_weight=True):
        super(Dynamic_conv2d, self).__init__()
        assert in_planes%groups==0
        self.in_planes = in_planes
        self.out_planes = out_planes
        self.kernel_size = kernel_size
        self.stride = stride
        self.padding = padding
        self.dilation = dilation
        self.groups = groups
        self.bias = bias
        self.K = K
        self.attention = attention2d(in_planes, ratio, K, temperature)

        self.weight = nn.Parameter(torch.randn(K, out_planes, in_planes//groups, kernel_size, kernel_size), requires_grad=True)
        if bias:
            self.bias = nn.Parameter(torch.Tensor(K, out_planes))
        else:
            self.bias = None
        if init_weight:
            self._initialize_weights()

        #TODO 初始化
    def _initialize_weights(self):
        for i in range(self.K):
            nn.init.kaiming_uniform_(self.weight[i])


    def update_temperature(self):
        self.attention.updata_temperature()

    def forward(self, x,y):#将batch视作维度变量，进行组卷积，因为组卷积的权重是不同的，动态卷积的权重也是不同的
        softmax_attention = self.attention(x)
        batch_size, in_planes, height, width = x.size()
        y = y.view(1, -1, height, width)# 变化成一个维度进行组卷积
        weight = self.weight.view(self.K, -1)

        # 动态卷积的权重的生成， 生成的是batch_size个卷积参数（每个参数不同）
        aggregate_weight = torch.mm(softmax_attention, weight).view(-1, self.in_planes, self.kernel_size, self.kernel_size)
        if self.bias is not None:
            aggregate_bias = torch.mm(softmax_attention, self.bias).view(-1)
            output = F.conv2d(y, weight=aggregate_weight, bias=aggregate_bias, stride=self.stride, padding=self.padding,
                              dilation=self.dilation, groups=self.groups*batch_size)
        else:
            output = F.conv2d(y, weight=aggregate_weight, bias=None, stride=self.stride, padding=self.padding,
                              dilation=self.dilation, groups=self.groups * batch_size)

        output = output.view(batch_size, self.out_planes, output.size(-2), output.size(-1))
        return output


class attention3d(nn.Module):
    def __init__(self, in_planes, ratios, K, temperature):
        super(attention3d, self).__init__()
        assert temperature%3==1
        self.avgpool = nn.AdaptiveAvgPool3d(1)
        if in_planes != 3:
            hidden_planes = int(in_planes * ratios)+1
        else:
            hidden_planes = K
        self.fc1 = nn.Conv3d(in_planes, hidden_planes, 1, bias=False)
        self.fc2 = nn.Conv3d(hidden_planes, K, 1, bias=False)
        self.temperature = temperature

    def updata_temperature(self):
        if self.temperature!=1:
            self.temperature -=3
            print('Change temperature to:', str(self.temperature))

    def forward(self, x):
        x = self.avgpool(x)
        x = self.fc1(x)
        x = F.relu(x)
        x = self.fc2(x).view(x.size(0), -1)
        return F.softmax(x / self.temperature, 1)

class Dynamic_conv3d(nn.Module):
    def __init__(self, in_planes, out_planes, kernel_size, ratio=0.25, stride=1, padding=0, dilation=1, groups=1, bias=True, K=4, temperature=34):
        super(Dynamic_conv3d, self).__init__()
        assert in_planes%groups==0
        self.in_planes = in_planes
        self.out_planes = out_planes
        self.kernel_size = kernel_size
        self.stride = stride
        self.padding = padding
        self.dilation = dilation
        self.groups = groups
        self.bias = bias
        self.K = K
        self.attention = attention3d(in_planes, ratio, K, temperature)

        self.weight = nn.Parameter(torch.randn(K, out_planes, in_planes//groups, kernel_size, kernel_size, kernel_size), requires_grad=True)
        if bias:
            self.bias = nn.Parameter(torch.Tensor(K, out_planes))
        else:
            self.bias = None


        #TODO 初始化
        # nn.init.kaiming_uniform_(self.weight, )

    def update_temperature(self):
        self.attention.updata_temperature()

    def forward(self, x):#将batch视作维度变量，进行组卷积，因为组卷积的权重是不同的，动态卷积的权重也是不同的
        softmax_attention = self.attention(x)
        batch_size, in_planes, depth, height, width = x.size()
        x = x.view(1, -1, depth, height, width)# 变化成一个维度进行组卷积
        weight = self.weight.view(self.K, -1)

        # 动态卷积的权重的生成， 生成的是batch_size个卷积参数（每个参数不同）
        aggregate_weight = torch.mm(softmax_attention, weight).view(-1, self.in_planes, self.kernel_size, self.kernel_size, self.kernel_size)
        if self.bias is not None:
            aggregate_bias = torch.mm(softmax_attention, self.bias).view(-1)
            output = F.conv3d(x, weight=aggregate_weight, bias=aggregate_bias, stride=self.stride, padding=self.padding,
                              dilation=self.dilation, groups=self.groups*batch_size)
        else:
            output = F.conv3d(x, weight=aggregate_weight, bias=None, stride=self.stride, padding=self.padding,
                              dilation=self.dilation, groups=self.groups * batch_size)

        output = output.view(batch_size, self.out_planes, output.size(-3), output.size(-2), output.size(-1))
        return output




if __name__ == '__main__':
    x = torch.randn(12, 256, 64, 64)
    y = torch.randn(12, 256, 64, 64)

    model = Dynamic_conv2d(in_planes=256, out_planes=256, kernel_size=3, ratio=0.25, padding=1,groups=1)
    x = x.to('cuda:0')
    y = y.to('cuda:0')
    model.to('cuda')
    # model.attention.cuda()
    print(model(x,y).shape)
    # nn.Conv3d()
    # print(model(x).shape)
    # model.update_temperature()
    # model.update_temperature()
    # model.update_temperature()
    # model.update_temperature()
    # model.update_temperature()
    # model.update_temperature()
    # model.update_temperature()
    # model.update_temperature()
    # model.update_temperature()
    # model.update_temperature()
    # model.update_temperature()
    # model.update_temperature()
    # model.update_temperature()
    # print(model(x).shape)
    # print(model(x).shape)
    # print(model(x).shape)
    # print(model(x).shape)
    # print(model(x).shape)
    # print(model(x).shape)
    # print(model(x).shape)
    # print(model(x).shape)
    # print(model(x).shape)
    # print(model(x).shape)
    # print(model(x).shape)
    # print(model(x).shape)
    # print(model(x).shape)
    # print(model(x).shape)
    # print(model(x).shape)
    # print(model(x).shape)
    # print(model(x).shape)
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    # print(model(x).shape)
    # print(model(x).shape)
    # print(model(x).shape)
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    # print(model(x).shape)