JPEG vs JPEG 2000

Garret MaginEric Strehlow

Overview

• We have a created a web-based image quality assessment system to have users login and compare JPEG and JPEG 2000

• The system includes– User creation

– User Login

– Test Creation

– Test Running

– Results Viewing

User Creation/Login http://www.garretmagin.com/school/ece533/

• If first time at site, create a new user account

• Login

• Admin can create tests

• Users can take tests

• Users can view results

Create Test

• Give the test a name• Put any special notes about test desired• Upload image

Take Test

• Choose a test to takeby clicking on the name

• View results by clickingthe view results link on the bottom

Tests

• Each test is a set of 6 comparisons– The user will compare compressed JPEG and JPEG

2000 images to an original image

– Each comparison will be for a different compression ratio (2x, 10x, 25x, 50x, 100x, and 200x)

• The user will choose which of the two images more accurately represents the original image– The images will come up in random order and not say

if they are JPEG or JPEG 2000 to avoid user bias

Test Examples

More Test Images

Results

• The top displays overall results for all tests

• Click a test name to see individual test results

Test Results

• The top displays overall results for this particular test

• Each cell shows results broken down by compression ratio

Conclusions

• JPEG 2000 was chosen almost 10 times as often as JPEG

• In the typical compression range of 10-50x, JPEG 2000 was almost unanimously chosen

• There were no tests where JPEG was chosen more than JPEG 2000

References

• JPEG2000 : image compression fundamentals, standards, and practice / David S. Taubman, Michael W. Marcellin.

(Wendt Library, 2nd Floor - TK6680.5 T38 2002)

• Programming Python (2nd Edition) O'Reilly & Associates

• http://www.jpeg.org/JPEG2000.html

• http://www.absolutvision.com/jpeg2000.php

• http://www.dspworx.com/primer_jpeg_vs__jpeg2000.htm

• http://www.aware.com/products/compression/j2kmaindemo.html

• http://www.dsp.toronto.edu/~dsp/JPEG2000/JPEG2000_1to50.pdf

• http://www.morgan-multimedia.com/jpeg2000_overview.htm

• http://www.ee.unsw.edu.au/~taubman/seminars_files/IEEE_IEA_J2K.pdf