Noisy Jpegs

[bobtodrick]

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1 hour ago, David Wien said:

I still dont see noise. Try doing it at ISO 12500 and you will see some noise (which can be removed by PhotoLab, etc), but at ISO 800 my Q3 is free of noise. 

David 

Same here…I would have thought they were the same photo because I don’t see any noise.

[David Wien]

44 minutes ago, bobtodrick said:

Same here…I would have thought they were the same photo because I don’t see any noise.

No. The camera has been moved laterally between the two shots.

David

[Kozonoh]

Even if you don’t see noise it is a bit puzzling that you don’t see the difference due to the alteration of the in-camera jpeg compression. But then…

[David Wien]

The artifacts of the camera generated jpeg are definitely worse -- probably due to the fact that there is less processing power available.

"My L-jpeg files which should be at 60 m are only at 30 m without any cropping in camera. My Film Style settings are set to std, noise reduction high, idr off. What am I missing? "

Try setting noise reduction to low. You should need no noise reduction at ISO 800 with the Q3. What do you mean by 60/30 m -- MPixels? The size of a jpeg depends upon the complexity of the image.

If you save the raw file to jpeg and compare it with the out of camera jpeg of the same linear dimensions (9520 x 6336 in each case) you can then compare the filesizes of the two. Whichever is smaller has had the most compression in converting to jpeg.

David

 

[Kozonoh]

Thank you David for your answer. You are right. I checked the in-camera Jpg in dxo and applied High Quality noise reduction (prime not available for Jpgs) without seeing any difference so it is only the compression which is responsible. But still I found the level of loss very high. Vive le Raw.

[David Wien]

I am glad that problem has been solved! 😃

David