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nagadomi avatar nagadomi commented on August 28, 2024

That is a feature of upconv_7 models. waifu2x-caffe is not related.
It seems that upconv_7's first noise reduction result is sharper than old vgg 7 models.

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YukiSakuma avatar YukiSakuma commented on August 28, 2024

I see I tried RGB noise then UpRGB magnify, the jagged lines disappeared so I wonder how UpRGB/UpPhoto is different from RGB/Photo when scaling/magnifying?
Except for the larger output size in Up model

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nagadomi avatar nagadomi commented on August 28, 2024

model difference is:

RGB/Photo

  1. image upscaling with nearest neighbor algorithm (very simple upscaler)
  2. fixing poor upscaled image with neural networks

UpRGB/UpPhoto

  1. directly image upscaling with neural networks (end-to-end optimization)

processing details is.. Neural networks only knows 😞. I have as impression that UpRGB/UpPhoto is very sensitive to the input image/pixels. The average quality of UpRGB/UpPhoto is better than RGB/Photo but sometimes it makes weird results.

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lltcggie avatar lltcggie commented on August 28, 2024

一応変換の適用ミスがないか調べてみましたが特にそういうことはなさそうだったので、このIssueは閉じます。

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