How to load syntax from ~/.vim/sytax/ folder?

Question

vim

I have ruby.vim in my ~/.vim/sytax/ folder
in .vimrc
autocmd BufNewFile,BufRead *.rb set syntax=ruby
but it feels like it's not the right way to load - folding doesn't work in some places (though it should). How can I make the syntax install specifically from ~/.vim/sytax/ruby.vim ?
Thanks

Answer 1

cv2, Pillow

Answer 2

Keywords: convolution matrix, median filter ( example ).