Hi @Yuri_Alves_Bordin ,
Quite along time ago I had a long discussion and ported a bit of open source code to LVGL for a stacked blur algorithm, the ‘C’ file attached to this post may be useful. The whole thread is about blur and may be useful to you. I can’t remember much about this now because I am old and have a terrible memory but there is a lot of information within this discussion.
I hope it helps…
Kind Regards,
Pete