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Originally Posted by mugaliens
According to these tests, PAQ8P and STUFFIT 12.0b both enjoy a respectable 25% compression ratio, and PackJPG2.3 pu is close behind, at 25%. |
18%?
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So what's the solution? How do we eliminate the scourage of compression artifacts? Simple - have all cameras, handheld, profession, space-boarn, whatever, take images and temporarily store them in bitmap format (lossless), while performing ongoing background compression (time isn't critical) to achieve a better than 7 to 1 compression for long-term storage and transmittal.
Then, use that amazing processing power of computers (workstations/desktops) everywhere, to perform on-the-fly decompression for viewing, and re-compressing for subsequent storage after image manipulation (such as cropping or adjustment of colors).
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I was under the impression that this was the way things were done now, mostly. Well, maybe not 7 to 1--but that 7 to 1 is related to that special illustration, which itself is a
reconstructed bitmap. Depending upon how the reconstruction went, there may not be new information and the subsequent re-compression can take advantage of that--and some programs may be more compatible with that particular type of
reconstruction.