Images come out wrong when using -s 2

[Ktr4ks]

While using the default scale of 4x, the output images come out correctly, but while using 2x something weird is happening. Have a look:

Input

Output 2x

Output 4x

[NaokiSato102]

me too

x1 (orig)

x2

x3

x4

[NaokiSato102]

I would like to have 1x increase (to do noise reduction only) while this is being addressed.

[ghost]

when i use realesrgan-x4plus-anime with -s 8 it also gets messy!

[AlphaHasher]

Can confirm this is still happening

The -s argument only works for the default realesr-animevideov3 model and not for anything other that is provided

all other models are stuck at 4x scale

Steps to recreate:

realesrgan-ncnn-vulkan.exe -i input.jpg -o output.png -n realesrgan-x4plus -s 2

or

realesrgan-ncnn-vulkan.exe -i input.jpg -o output.png -n realesrgan-x4plus-anime -s 2

Output (for both):

[AlphaHasher]

I narrowed this issue down to being an issue. It is because the model being used for is a 4x model which means that it can only be used for 4x scale

[zetyquickly]

I also created a duplicate issue https://github.com/xinntao/Real-ESRGAN-ncnn-vulkan/issues/39

The fix for me was to use -f JPG