Berkeley CSUA MOTD:Entry 12744
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2025/04/04 [General] UID:1000 Activity:popular
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2004/3/18-19 [Consumer/Camera] UID:12744 Activity:moderate
3/18    My camera can save a jpeg with normal, fine, or superfine
        compression.  Does anyone know numerically what this corresponds to?
        For example, maybe superfine is 99%, fine is 95%, and normal is 80%
        compression.
        \_ It seems from your numbers that you're thinking backwards.  JPEG
           uses a lossy compression.  Normal would be more compressed (poorer
           quality), where super fine is probably uncompressed, and thus much
           higher quality.
        \_ not really sure, but i've noticed very few differences in quality
           on my camera (canon S45) on those jpeg settings. i save everything
           in RAW format anyway.
        \_ On mine it's roughly norma;=150k, fine=350k, super=1M
        \_ There is no standard for such numerical values.  What does "99%"
           mean?  99% of the size of the uncompressed image? (Commonly used
           compression levels give ~10:1 reduction in size.) 99% of the signal
           represented accurately in comparison to the uncompressed image?
        \_ how about you take the same shot 3 times and just look at the
           output file with a jpeg info viewer?
2025/04/04 [General] UID:1000 Activity:popular
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