Is VMAF a good quality metric for cartoon images? I want to up my image codec autism game. If you launch this windows script from the CLI directly it will encode a webp to a desired quality setting and spit out a vmaf score.

@echo off
set /p quality=Enter quality:
cwebp -m 6 -q %quality% in.png -o %quality%.webp
ffmpeg -hide_banner -i in.png -i %quality%.webp -filter_complex "[0:v][1:v]libvmaf" -f null -

I'm gonna try it out across different webp quality settings and try to match it with libjpeg-turbo.