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DLI v1.3 has 3 new/updated features:
1) Updated optimize for visual quality mode
2) New "high speed" visual quality mode
3) New alternate decoder
Updated optimize for visual quality
All MSE optimization technologies have been adapted and incorporated into the visual mode.
Compression has increased up to 10% (avg 3%) compared with v1.2 using MS-SSIM as a measure.
Refer to the MS-SSIM graphs for compression results of "DLI -ov".
New "high speed" visual mode (default mode in v1.3)
Modified version of the -ov codec for low computation. Compression features were adapted
and removed as needed to make a codec fast enough for practical use. The resulting codec
averages 9% less compression than the -ov codec. Refer to the MS-SSIM graphs for compression
results of "DLI". Both compression and decompression are over a thousand times faster than
the -ov codec. As an example, the following are processing times for each of DLI's modes using
the Lena image (512x512 color) on a 2.4 GHz AMD Athlon64.
Default mode: Compression 0.28 sec, decompression 0.04 sec.
DLI -ov mode: Compression 344 sec, decompression 153 sec.
DLI -or mode: Compression 657 sec, decompression 100 sec.
New alternate decoder
A second decoder for "high speed" mode compressed data was implemented.
It is experimental and not recommended for use. Compared with the default decoder:
1) Takes ~4x as long to decode an image
2) Decoded images have slightly higher MS-SSIM results
3) Decoded images often appear visually inferior
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DLI v1.3 Details |