Lena (512x512 color)
 
The following images are Lena compressed 100:1 by each codec.
 
DLI, 7785 Bytes
 
Kakadu JPEG2000, 7870 Bytes
 
Jasper JPEG2000, 7854 Bytes
 
HD Photo (WMP), 7792 Bytes
 
IJG JPEG, 8253 Bytes
 
The following are magnified sections for each of the above images.
 
DLI, 7785 Bytes
 
Kakadu JPEG2000, 7870 Bytes
 
Jasper JPEG2000, 7854 Bytes
 
HD Photo (WMP), 7792 Bytes
 
IJG JPEG, 8253 Bytes
 
Visualization of Y-PSNR for the above images, order of colors for increasing error (black, blue, green, yellow, red).
 
DLI, 7785 Bytes
 
Kakadu JPEG2000, 7870 Bytes
 
Jasper JPEG2000, 7854 Bytes
 
HD Photo (WMP), 7792 Bytes
 
IJG JPEG, 8253 Bytes
 
The following images are compressed by each codec to approximately the same PSNR.
In my opinion they are not all equal in subjective quality, however I leave it to the reader to make his/her own determinations.
 
DLI, 5178 Bytes (152:1), 33.07 Y-PSNR
 
Kakadu JPEG2000, 9108 Bytes (86:1), 33.10 Y-PSNR
 
Jasper JPEG2000, 10961 Bytes (72:1), 33.06 Y-PSNR
 
HD Photo (WMP), 10582 Bytes (74:1), 33.14 Y-PSNR
 
IJG JPEG, 12861 Bytes (61:1), 33.17 Y-PSNR
 
The following are magnified sections for each of the above images.
 
DLI, 5178 Bytes (152:1), 33.07 Y-PSNR
 
Kakadu JPEG2000, 9108 Bytes (86:1), 33.10 Y-PSNR
 
Jasper JPEG2000, 10961 Bytes (72:1), 33.06 Y-PSNR
 
HD Photo (WMP), 10582 Bytes (74:1), 33.14 Y-PSNR
 
IJG JPEG, 12861 Bytes (61:1), 33.17 Y-PSNR
 
To emphasize the compression artifacts each codec introduces, here is Lena compressed at a very high 200:1.
 
DLI, 3897 Bytes
 
Kakadu JPEG2000, 3934 Bytes
 
Jasper JPEG2000, 3923 Bytes
 
HD Photo (WMP), 4033 Bytes
 
IJG JPEG, 3932 Bytes
 
The following are magnified sections for each of the above images.
 
DLI, 3897 Bytes
 
Kakadu JPEG2000, 3934 Bytes
 
Jasper JPEG2000, 3923 Bytes
 
HD Photo (WMP), 4033 Bytes
 
IJG JPEG, 3932 Bytes