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Increasing the compressibility of GIF images
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In part 1 of my Ph.D. research, I've developed a image processing
technique which increases the compressibility of images using
Lempel-Ziv based algorithms. On algorithm of particular
importance is the GIF image format which dominates data on the
web today. This approach can reduce data requirements by up to 40%
with virtually no visual loss. Further this approach can be combined
with existing GIF reduction techniques to yield images which are
as much as 60% smaller, yet still virtually indistinguishable
from the originals.
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The images shown here have been chosen from the first page of each
of the top 50 Media Metrix sites as measured in December, 2001.
Because these companies must pay for the bandwidth required to send
these images to each recipient, in many cases much effort has already
been taken to optimize these images.
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Original |
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Size: |
2968 bytes |
Bits Per Pixel: |
1.58293 |
PSNR: |
exact |
Reduction: |
n/a |
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GIFipled |
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Size: |
1964 bytes |
Bits Per Pixel: |
1.04747 |
PSNR: |
37.5557 |
Reduction: |
33% |
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Color Reduction |
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Size: |
1707 bytes |
Bits Per Pixel: |
0.9104 |
PSNR: |
67.6572 |
Reduction: |
42% |
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Color Reduction coupled with GIFiply |
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Size: |
1036 bytes |
Bits Per Pixel: |
0.552533 |
PSNR: |
37.5747 |
Reduction: |
65% |
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Page loaded on November 27, 2024 at 04:18 PM.
Page last modified on
2006-05-27
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Copyright © 1997-2024, Jeremy S. De Bonet.
All rights reserved.
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