Compressed Image quality

[amit08]

Hello

I'm using sample IJL(IPP 6.1) for image compression. When i zoomed (200% ~ 300%) the compressed image,

i observed the followings artifacts

- noise around characters,

- ringing noise around sharp edges,

- blurring,

- color distortion.

If i set quality factor to 100 still compressed jpeg image shows above artifacts.

How to remove these artifacts ? Please let me know any possible solution.

Thanks in advance :-))

[Vladimir_Dudnik]

Hello,

The IJL library only implements JPEG lossy compression mode, which mean there is always quality losses at compression (although you can control amount of loss by quality parameter but can't completely avoid this).

If you are looking at lossless compression I'd recommend you to check UIC sample (unified image codec) where we do provide IPP boosted JPEG (both lossy and lossless), JPEG2000 (both lossy and lossless) and PNG (lossless) compression algorithms.

Regards,
Vladimir