https://arxiv.org/pdf/1604.07322.pdf
https://books.google.com/books?id=RC9ACQAAQBAJ&pg=PA13&lpg=PA13&dq=blockiness+detection&source=bl&ots=a9Q4LOW4H3&sig=ACfU3U1lPMx1CgyPpVHmBIZUj0fBBj_iuw&hl=zh-CN&sa=X&ved=2ahUKEwiep_HP4aLjAhXWZt4KHc3KAAA4ChDoATAIegQICBAB#v=onepage&q=blockiness detection&f=false
https://orbit.dtu.dk/files/110949261/paper_ML_revised.pdf
http://eprints.uthm.edu.my/6534/1/200.pdf