4 ms·
I wondered what had happened to it. In the early 90s it seemed like it would be the future of image compression, and here we are in 2014 still using DCTs.
by neckro23 12y ago
I wondered what had happened to it. In the early 90s it seemed like it would be the future of image compression, and here we are in 2014 still using DCTs.
- ska 12y agoThe real stumbling block is the difficulty in generating anything embedable, and the need to iterate on the decoder side. You can get pretty good results for general images, but not "better enough" to justify this cost over, say as wavelet threshold plus entropy coding. You also can have artifacts of the shape Of the domain support, and getting rid of these makes the encoder quite expensive ( less of a problem)
- krylon 12y agoA couple of years back I saw a documentary on fractals ("Fractals: The Colors of Infinity", narrated by Arthur C. Clarke, with music by Dave Gilmour of Pink Floyd - that was one groovy documentary!) where they showed this mathematician who apparently had a research grant from some military-intelligence-ish government agency to develop fractal image compression for their spy satellites. I wondered why I never that technology in action, and I figured it had something to do with the amount of secrecy surrounding spy satellites. It is kind of sad that the reason is so much more mundane.