Hot news:

If you find a spelling error, please select an incorrect text and press Ctrl+Enter. Thank you!

Compression project >> Video Area Home
RUSSIAN VERSION

MSU Windows Media Photo (Microsoft HD Photo) and JPEG 2000 Codecs Comparison

MSU Graphics & Media Lab (Video Group)

Project head: Dr. Dmitriy Vatolin
Measurements: Alexey Moskvin
Refinement, translation: Oleg Petrov


About comparison


Tested codecs:

Download MSU Windows Media Photo and JPEG 2000 Codecs Comparison (26 pages in PDF, 4833 KB)


Goal of WMPhoto testing


WMPhoto is a new format for image compression that is said to have better quality/compression ratio than that of current standards, including JPEG 2000. The main goal of this testing was the verification of superiority of WMPhoto by comparing it against nine JPEG 2000 codecs from last year's JPEG 2000 Image Codecs Comparison.

Main comparison parts:

  1. Y-PSNR comparison.
  2. Visual comparison.
  3. Informal comparison.


PSNR comparison


PSNR is a metric used to compare two pictures: the more per pixel difference between the pictures is the less is PSNR value. So the higher is the codec's line on the graph the better is the compression quality.

PSNR was measured using the PRO version of MSU Video Quality Measurement Tool (with command line support).

Y-PSNR is the difference in brightness component. There are three graphs for WMPhoto, they correspond to different values of overlapping parameter ("l").
Warning: this is only one of eight graphs from our comparison! All of them can be found in the PDF with comparison..

ACDSee
Barbara image, Y-PSNR


Visual codec comparison


In most cases the PSNR value is in accordance with the compression quality. But sometimes this metric does not reflect presence of some important visual artefacts. For example, we can't estimate the quality of the blurring artefacts compensation performed by some codec using only PSNR metric. Also in some cases it is difficult to say whether 2 dB differens is significant or not.

That is why in addition to PSNR graphs we use visual comparison of images compressed by different codecs.

ACDSee
ACDSee 7.0, 18324 bytes
WMPhoto
WMPhoto, 16553 bytes
There are samples of images compressed by every codec in PDF with comparison .


Download


Call for codecs 2013
See all MSU Video Codec Comparisons

MSU video codecs comparisons resources:

e-mail: 


Other resources


Video resources:

Bookmark this page:   Add to Del.icio.us Add to Del.icio.us     Digg It Digg It     reddit reddit


 
Last updated: 10-March-2011

Search (Russian):
Server size: 8069 files, 1215Mb (Server statistics)

Project updated by
Server Team and MSU Video Group


Project sponsored by YUVsoft Corp.

Project supported by MSU Graphics & Media Lab

Rambler's Top100 @Mail.ru