1. JPEG vs JPEG 2000 Garret Magin Eric Strehlow

2. 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

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

4. Create Test Give the test a name Put any special notes about test desired Upload image

5. Take Test Choose a test to take by clicking on the name View results by clicking the view results link on the bottom

6. 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

7. Test Examples

8. More Test Images

9. Results The top displays overall results for all tests Click a test name to see individual test results

10. Test Results The top displays overall results for this particular test Each cell shows results broken down by compression ratio

11. 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

12. 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