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JPEG2000 had awesome option of having progressive quality. During compression user could specify number of quality years, with each layer having specific compre
by adamzochowski 13y ago
JPEG2000 had awesome option of having progressive quality. During compression user could specify number of quality years, with each layer having specific compression ratios. Browser could download a chunk of JPEG2000 and render it, and depending on bandwidth available the browser would keep downloading and improving image quality.
Both Jasper support this (ilyrrates) and OpenJpeg (-r and -q) support this functionality.
- acdha 13y agoI really wish the open-source JP2 situation was better. OpenJPEG is looking good but it's still in need of some performance work – which is a real shame since, as you pointed out, it'd be perfect for responsive imaging - just use HTTP byte ranges and it'd work with most proxies and caches, too.