JPEG compression and quality level



Hello all!

Is there a way or some (free) 3rd party algorithm to determine the JPEG compression level? We need to make sure that some JPEGs have a certain quality. Images under a some threshold value shall be rejected form being upploaded.

E.g. our JPEG quality scale would be from 0-100%, then all images below 70% can't be submitted. (100% is the lowest compression possible, large file)

Is there such an algorithm?

Karsten

.



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