progressive-jpeg-pr

Tags: obscure features of jpeg, computers

• https://github.com/jarun/imgp/issues/28
• https://cloudinary.com/blog/progressive_jpegs_and_green_martians
• https://github.com/python-pillow/Pillow/issues/3343

Goal:

• support progressive scanning of JPEGs in Pillow
• write blog post similar to https://yasoob.me/posts/understanding-and-writing-jpeg-decoder-in-python/
• conversoin is lossless
• find out what a progression scan script is