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| import torch | |
| import torch.nn as nn | |
| import torch.nn.functional as F | |
| class REBNCONV(nn.Module): | |
| def __init__(self,in_ch=3,out_ch=3,dirate=1,stride=1): | |
| super(REBNCONV,self).__init__() | |
| self.conv_s1 = nn.Conv2d(in_ch,out_ch,3,padding=1*dirate,dilation=1*dirate,stride=stride) | |
| self.bn_s1 = nn.BatchNorm2d(out_ch) | |
| self.relu_s1 = nn.ReLU(inplace=True) | |
| def forward(self,x): | |
| hx = x | |
| xout = self.relu_s1(self.bn_s1(self.conv_s1(hx))) | |
| return xout | |
| ## upsample tensor 'src' to have the same spatial size with tensor 'tar' | |
| def _upsample_like(src,tar): | |
| src = F.interpolate(src,size=tar.shape[2:],mode='bilinear') | |
| return src | |
| ### RSU-7 ### | |
| class RSU7(nn.Module): | |
| def __init__(self, in_ch=3, mid_ch=12, out_ch=3, img_size=512): | |
| super(RSU7,self).__init__() | |
| self.in_ch = in_ch | |
| self.mid_ch = mid_ch | |
| self.out_ch = out_ch | |
| self.rebnconvin = REBNCONV(in_ch,out_ch,dirate=1) ## 1 -> 1/2 | |
| self.rebnconv1 = REBNCONV(out_ch,mid_ch,dirate=1) | |
| self.pool1 = nn.MaxPool2d(2,stride=2,ceil_mode=True) | |
| self.rebnconv2 = REBNCONV(mid_ch,mid_ch,dirate=1) | |
| self.pool2 = nn.MaxPool2d(2,stride=2,ceil_mode=True) | |
| self.rebnconv3 = REBNCONV(mid_ch,mid_ch,dirate=1) | |
| self.pool3 = nn.MaxPool2d(2,stride=2,ceil_mode=True) | |
| self.rebnconv4 = REBNCONV(mid_ch,mid_ch,dirate=1) | |
| self.pool4 = nn.MaxPool2d(2,stride=2,ceil_mode=True) | |
| self.rebnconv5 = REBNCONV(mid_ch,mid_ch,dirate=1) | |
| self.pool5 = nn.MaxPool2d(2,stride=2,ceil_mode=True) | |
| self.rebnconv6 = REBNCONV(mid_ch,mid_ch,dirate=1) | |
| self.rebnconv7 = REBNCONV(mid_ch,mid_ch,dirate=2) | |
| self.rebnconv6d = REBNCONV(mid_ch*2,mid_ch,dirate=1) | |
| self.rebnconv5d = REBNCONV(mid_ch*2,mid_ch,dirate=1) | |
| self.rebnconv4d = REBNCONV(mid_ch*2,mid_ch,dirate=1) | |
| self.rebnconv3d = REBNCONV(mid_ch*2,mid_ch,dirate=1) | |
| self.rebnconv2d = REBNCONV(mid_ch*2,mid_ch,dirate=1) | |
| self.rebnconv1d = REBNCONV(mid_ch*2,out_ch,dirate=1) | |
| def forward(self,x): | |
| b, c, h, w = x.shape | |
| hx = x | |
| hxin = self.rebnconvin(hx) | |
| hx1 = self.rebnconv1(hxin) | |
| hx = self.pool1(hx1) | |
| hx2 = self.rebnconv2(hx) | |
| hx = self.pool2(hx2) | |
| hx3 = self.rebnconv3(hx) | |
| hx = self.pool3(hx3) | |
| hx4 = self.rebnconv4(hx) | |
| hx = self.pool4(hx4) | |
| hx5 = self.rebnconv5(hx) | |
| hx = self.pool5(hx5) | |
| hx6 = self.rebnconv6(hx) | |
| hx7 = self.rebnconv7(hx6) | |
| hx6d = self.rebnconv6d(torch.cat((hx7,hx6),1)) | |
| hx6dup = _upsample_like(hx6d,hx5) | |
| hx5d = self.rebnconv5d(torch.cat((hx6dup,hx5),1)) | |
| hx5dup = _upsample_like(hx5d,hx4) | |
| hx4d = self.rebnconv4d(torch.cat((hx5dup,hx4),1)) | |
| hx4dup = _upsample_like(hx4d,hx3) | |
| hx3d = self.rebnconv3d(torch.cat((hx4dup,hx3),1)) | |
| hx3dup = _upsample_like(hx3d,hx2) | |
| hx2d = self.rebnconv2d(torch.cat((hx3dup,hx2),1)) | |
| hx2dup = _upsample_like(hx2d,hx1) | |
| hx1d = self.rebnconv1d(torch.cat((hx2dup,hx1),1)) | |
| return hx1d + hxin | |
| ### RSU-6 ### | |
| class RSU6(nn.Module): | |
| def __init__(self, in_ch=3, mid_ch=12, out_ch=3): | |
| super(RSU6,self).__init__() | |
| self.rebnconvin = REBNCONV(in_ch,out_ch,dirate=1) | |
| self.rebnconv1 = REBNCONV(out_ch,mid_ch,dirate=1) | |
| self.pool1 = nn.MaxPool2d(2,stride=2,ceil_mode=True) | |
| self.rebnconv2 = REBNCONV(mid_ch,mid_ch,dirate=1) | |
| self.pool2 = nn.MaxPool2d(2,stride=2,ceil_mode=True) | |
| self.rebnconv3 = REBNCONV(mid_ch,mid_ch,dirate=1) | |
| self.pool3 = nn.MaxPool2d(2,stride=2,ceil_mode=True) | |
| self.rebnconv4 = REBNCONV(mid_ch,mid_ch,dirate=1) | |
| self.pool4 = nn.MaxPool2d(2,stride=2,ceil_mode=True) | |
| self.rebnconv5 = REBNCONV(mid_ch,mid_ch,dirate=1) | |
| self.rebnconv6 = REBNCONV(mid_ch,mid_ch,dirate=2) | |
| self.rebnconv5d = REBNCONV(mid_ch*2,mid_ch,dirate=1) | |
| self.rebnconv4d = REBNCONV(mid_ch*2,mid_ch,dirate=1) | |
| self.rebnconv3d = REBNCONV(mid_ch*2,mid_ch,dirate=1) | |
| self.rebnconv2d = REBNCONV(mid_ch*2,mid_ch,dirate=1) | |
| self.rebnconv1d = REBNCONV(mid_ch*2,out_ch,dirate=1) | |
| def forward(self,x): | |
| hx = x | |
| hxin = self.rebnconvin(hx) | |
| hx1 = self.rebnconv1(hxin) | |
| hx = self.pool1(hx1) | |
| hx2 = self.rebnconv2(hx) | |
| hx = self.pool2(hx2) | |
| hx3 = self.rebnconv3(hx) | |
| hx = self.pool3(hx3) | |
| hx4 = self.rebnconv4(hx) | |
| hx = self.pool4(hx4) | |
| hx5 = self.rebnconv5(hx) | |
| hx6 = self.rebnconv6(hx5) | |
| hx5d = self.rebnconv5d(torch.cat((hx6,hx5),1)) | |
| hx5dup = _upsample_like(hx5d,hx4) | |
| hx4d = self.rebnconv4d(torch.cat((hx5dup,hx4),1)) | |
| hx4dup = _upsample_like(hx4d,hx3) | |
| hx3d = self.rebnconv3d(torch.cat((hx4dup,hx3),1)) | |
| hx3dup = _upsample_like(hx3d,hx2) | |
| hx2d = self.rebnconv2d(torch.cat((hx3dup,hx2),1)) | |
| hx2dup = _upsample_like(hx2d,hx1) | |
| hx1d = self.rebnconv1d(torch.cat((hx2dup,hx1),1)) | |
| return hx1d + hxin | |
| ### RSU-5 ### | |
| class RSU5(nn.Module): | |
| def __init__(self, in_ch=3, mid_ch=12, out_ch=3): | |
| super(RSU5,self).__init__() | |
| self.rebnconvin = REBNCONV(in_ch,out_ch,dirate=1) | |
| self.rebnconv1 = REBNCONV(out_ch,mid_ch,dirate=1) | |
| self.pool1 = nn.MaxPool2d(2,stride=2,ceil_mode=True) | |
| self.rebnconv2 = REBNCONV(mid_ch,mid_ch,dirate=1) | |
| self.pool2 = nn.MaxPool2d(2,stride=2,ceil_mode=True) | |
| self.rebnconv3 = REBNCONV(mid_ch,mid_ch,dirate=1) | |
| self.pool3 = nn.MaxPool2d(2,stride=2,ceil_mode=True) | |
| self.rebnconv4 = REBNCONV(mid_ch,mid_ch,dirate=1) | |
| self.rebnconv5 = REBNCONV(mid_ch,mid_ch,dirate=2) | |
| self.rebnconv4d = REBNCONV(mid_ch*2,mid_ch,dirate=1) | |
| self.rebnconv3d = REBNCONV(mid_ch*2,mid_ch,dirate=1) | |
| self.rebnconv2d = REBNCONV(mid_ch*2,mid_ch,dirate=1) | |
| self.rebnconv1d = REBNCONV(mid_ch*2,out_ch,dirate=1) | |
| def forward(self,x): | |
| hx = x | |
| hxin = self.rebnconvin(hx) | |
| hx1 = self.rebnconv1(hxin) | |
| hx = self.pool1(hx1) | |
| hx2 = self.rebnconv2(hx) | |
| hx = self.pool2(hx2) | |
| hx3 = self.rebnconv3(hx) | |
| hx = self.pool3(hx3) | |
| hx4 = self.rebnconv4(hx) | |
| hx5 = self.rebnconv5(hx4) | |
| hx4d = self.rebnconv4d(torch.cat((hx5,hx4),1)) | |
| hx4dup = _upsample_like(hx4d,hx3) | |
| hx3d = self.rebnconv3d(torch.cat((hx4dup,hx3),1)) | |
| hx3dup = _upsample_like(hx3d,hx2) | |
| hx2d = self.rebnconv2d(torch.cat((hx3dup,hx2),1)) | |
| hx2dup = _upsample_like(hx2d,hx1) | |
| hx1d = self.rebnconv1d(torch.cat((hx2dup,hx1),1)) | |
| return hx1d + hxin | |
| ### RSU-4 ### | |
| class RSU4(nn.Module): | |
| def __init__(self, in_ch=3, mid_ch=12, out_ch=3): | |
| super(RSU4,self).__init__() | |
| self.rebnconvin = REBNCONV(in_ch,out_ch,dirate=1) | |
| self.rebnconv1 = REBNCONV(out_ch,mid_ch,dirate=1) | |
| self.pool1 = nn.MaxPool2d(2,stride=2,ceil_mode=True) | |
| self.rebnconv2 = REBNCONV(mid_ch,mid_ch,dirate=1) | |
| self.pool2 = nn.MaxPool2d(2,stride=2,ceil_mode=True) | |
| self.rebnconv3 = REBNCONV(mid_ch,mid_ch,dirate=1) | |
| self.rebnconv4 = REBNCONV(mid_ch,mid_ch,dirate=2) | |
| self.rebnconv3d = REBNCONV(mid_ch*2,mid_ch,dirate=1) | |
| self.rebnconv2d = REBNCONV(mid_ch*2,mid_ch,dirate=1) | |
| self.rebnconv1d = REBNCONV(mid_ch*2,out_ch,dirate=1) | |
| def forward(self,x): | |
| hx = x | |
| hxin = self.rebnconvin(hx) | |
| hx1 = self.rebnconv1(hxin) | |
| hx = self.pool1(hx1) | |
| hx2 = self.rebnconv2(hx) | |
| hx = self.pool2(hx2) | |
| hx3 = self.rebnconv3(hx) | |
| hx4 = self.rebnconv4(hx3) | |
| hx3d = self.rebnconv3d(torch.cat((hx4,hx3),1)) | |
| hx3dup = _upsample_like(hx3d,hx2) | |
| hx2d = self.rebnconv2d(torch.cat((hx3dup,hx2),1)) | |
| hx2dup = _upsample_like(hx2d,hx1) | |
| hx1d = self.rebnconv1d(torch.cat((hx2dup,hx1),1)) | |
| return hx1d + hxin | |
| ### RSU-4F ### | |
| class RSU4F(nn.Module): | |
| def __init__(self, in_ch=3, mid_ch=12, out_ch=3): | |
| super(RSU4F,self).__init__() | |
| self.rebnconvin = REBNCONV(in_ch,out_ch,dirate=1) | |
| self.rebnconv1 = REBNCONV(out_ch,mid_ch,dirate=1) | |
| self.rebnconv2 = REBNCONV(mid_ch,mid_ch,dirate=2) | |
| self.rebnconv3 = REBNCONV(mid_ch,mid_ch,dirate=4) | |
| self.rebnconv4 = REBNCONV(mid_ch,mid_ch,dirate=8) | |
| self.rebnconv3d = REBNCONV(mid_ch*2,mid_ch,dirate=4) | |
| self.rebnconv2d = REBNCONV(mid_ch*2,mid_ch,dirate=2) | |
| self.rebnconv1d = REBNCONV(mid_ch*2,out_ch,dirate=1) | |
| def forward(self,x): | |
| hx = x | |
| hxin = self.rebnconvin(hx) | |
| hx1 = self.rebnconv1(hxin) | |
| hx2 = self.rebnconv2(hx1) | |
| hx3 = self.rebnconv3(hx2) | |
| hx4 = self.rebnconv4(hx3) | |
| hx3d = self.rebnconv3d(torch.cat((hx4,hx3),1)) | |
| hx2d = self.rebnconv2d(torch.cat((hx3d,hx2),1)) | |
| hx1d = self.rebnconv1d(torch.cat((hx2d,hx1),1)) | |
| return hx1d + hxin | |
| class myrebnconv(nn.Module): | |
| def __init__(self, in_ch=3, | |
| out_ch=1, | |
| kernel_size=3, | |
| stride=1, | |
| padding=1, | |
| dilation=1, | |
| groups=1): | |
| super(myrebnconv,self).__init__() | |
| self.conv = nn.Conv2d(in_ch, | |
| out_ch, | |
| kernel_size=kernel_size, | |
| stride=stride, | |
| padding=padding, | |
| dilation=dilation, | |
| groups=groups) | |
| self.bn = nn.BatchNorm2d(out_ch) | |
| self.rl = nn.ReLU(inplace=True) | |
| def forward(self,x): | |
| return self.rl(self.bn(self.conv(x))) | |
| class BriaRMBG(nn.Module): | |
| def __init__(self,in_ch=3,out_ch=1): | |
| super(BriaRMBG,self).__init__() | |
| self.conv_in = nn.Conv2d(in_ch,64,3,stride=2,padding=1) | |
| self.pool_in = nn.MaxPool2d(2,stride=2,ceil_mode=True) | |
| self.stage1 = RSU7(64,32,64) | |
| self.pool12 = nn.MaxPool2d(2,stride=2,ceil_mode=True) | |
| self.stage2 = RSU6(64,32,128) | |
| self.pool23 = nn.MaxPool2d(2,stride=2,ceil_mode=True) | |
| self.stage3 = RSU5(128,64,256) | |
| self.pool34 = nn.MaxPool2d(2,stride=2,ceil_mode=True) | |
| self.stage4 = RSU4(256,128,512) | |
| self.pool45 = nn.MaxPool2d(2,stride=2,ceil_mode=True) | |
| self.stage5 = RSU4F(512,256,512) | |
| self.pool56 = nn.MaxPool2d(2,stride=2,ceil_mode=True) | |
| self.stage6 = RSU4F(512,256,512) | |
| # decoder | |
| self.stage5d = RSU4F(1024,256,512) | |
| self.stage4d = RSU4(1024,128,256) | |
| self.stage3d = RSU5(512,64,128) | |
| self.stage2d = RSU6(256,32,64) | |
| self.stage1d = RSU7(128,16,64) | |
| self.side1 = nn.Conv2d(64,out_ch,3,padding=1) | |
| self.side2 = nn.Conv2d(64,out_ch,3,padding=1) | |
| self.side3 = nn.Conv2d(128,out_ch,3,padding=1) | |
| self.side4 = nn.Conv2d(256,out_ch,3,padding=1) | |
| self.side5 = nn.Conv2d(512,out_ch,3,padding=1) | |
| self.side6 = nn.Conv2d(512,out_ch,3,padding=1) | |
| # self.outconv = nn.Conv2d(6*out_ch,out_ch,1) | |
| def forward(self,x): | |
| hx = x | |
| hxin = self.conv_in(hx) | |
| #hx = self.pool_in(hxin) | |
| #stage 1 | |
| hx1 = self.stage1(hxin) | |
| hx = self.pool12(hx1) | |
| #stage 2 | |
| hx2 = self.stage2(hx) | |
| hx = self.pool23(hx2) | |
| #stage 3 | |
| hx3 = self.stage3(hx) | |
| hx = self.pool34(hx3) | |
| #stage 4 | |
| hx4 = self.stage4(hx) | |
| hx = self.pool45(hx4) | |
| #stage 5 | |
| hx5 = self.stage5(hx) | |
| hx = self.pool56(hx5) | |
| #stage 6 | |
| hx6 = self.stage6(hx) | |
| hx6up = _upsample_like(hx6,hx5) | |
| #-------------------- decoder -------------------- | |
| hx5d = self.stage5d(torch.cat((hx6up,hx5),1)) | |
| hx5dup = _upsample_like(hx5d,hx4) | |
| hx4d = self.stage4d(torch.cat((hx5dup,hx4),1)) | |
| hx4dup = _upsample_like(hx4d,hx3) | |
| hx3d = self.stage3d(torch.cat((hx4dup,hx3),1)) | |
| hx3dup = _upsample_like(hx3d,hx2) | |
| hx2d = self.stage2d(torch.cat((hx3dup,hx2),1)) | |
| hx2dup = _upsample_like(hx2d,hx1) | |
| hx1d = self.stage1d(torch.cat((hx2dup,hx1),1)) | |
| #side output | |
| d1 = self.side1(hx1d) | |
| d1 = _upsample_like(d1,x) | |
| d2 = self.side2(hx2d) | |
| d2 = _upsample_like(d2,x) | |
| d3 = self.side3(hx3d) | |
| d3 = _upsample_like(d3,x) | |
| d4 = self.side4(hx4d) | |
| d4 = _upsample_like(d4,x) | |
| d5 = self.side5(hx5d) | |
| d5 = _upsample_like(d5,x) | |
| d6 = self.side6(hx6) | |
| d6 = _upsample_like(d6,x) | |
| return [F.sigmoid(d1), F.sigmoid(d2), F.sigmoid(d3), F.sigmoid(d4), F.sigmoid(d5), F.sigmoid(d6)],[hx1d,hx2d,hx3d,hx4d,hx5d,hx6] | |