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751994772 avatar 751994772 commented on May 18, 2024

I also have this problem, how did you solve it.

from pytorch-cyclegan.

xycjscs avatar xycjscs commented on May 18, 2024

this is a bug widely spreaded in GAN like networks.
when you do upsampling, you should not use deconvolution/transposed/ any similar networks.
You should use resize convolution/ Upsample networks.
check this paper: https://distill.pub/2016/deconv-checkerboard/
#Checkerboard #Artifacts

some code for beginners:

class UpBlock(nn.Module):
    def __init__(self, in_channels, out_channels):
        super(UpBlock, self).__init__()
        # Replace upconv with an interpolation followed by a convolution.
        self.upsample = nn.Upsample(scale_factor=2, mode='bilinear')  # You can also try mode='bilinear'
        self.conv = nn.Conv2d(in_channels, in_channels // 2, kernel_size=3, padding=1)
        self.conv_block = ConvBlock(in_channels // 2 + in_channels // 2, out_channels)  # Adjust for the concatenated channels

    def forward(self, x, skip):
        x = self.upsample(x)
        x = self.conv(x)
        x = torch.cat([x, skip], dim=1)
        return self.conv_block(x)

from pytorch-cyclegan.

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