brainiac:
Yes - and unfortunately I felt I had to write it because confusion about this issue is rife. Correct comparison between two cameras to see which is noisier is done by comparing equal proportions of the overall picture.
I think that part of a problem when looking at the resolution and noise is that in your approach these are two components that contribute the overall image (preferably printed).
Some, including me, would prefer to see these two (noise and resolution) as two separated parameters. We could say that if \"pixel noise\" (or the noise of the same number of pixels) is the same then camera A (with 30 Mipxels) would have higher resolution with detail proportionally higher that camera B (21 Mpixels). Otherwise the comparison has to include looking at \"image equivalents\"
By the extension, I can just throw away (crop) some pixels and know what to expect as far as overall noise is concerned.
I am actually having problems seeing why 30 Million of noisier pictures would give less noise than 21 Million of much \"cleaner\" pixels, if there is no other noise contributions.
brainiac:
Yes - and unfortunately I felt I had to write it because confusion about this issue is rife. Correct comparison between two cameras to see which is noisier is done by comparing equal proportions of the overall picture.
I think that part of a problem when looking at the resolution and noise is that in your approach these are two components that contribute the overall image (preferably printed).
Some, including me, would prefer to see these two (noise and resolution) as two separated parameters. We could say that if \"pixel noise\" (or the noise of the same number of pixels) is the same then camera A (with 30 Mipxels) would have higher resolution with detail proportionally higher that camera B (21 Mpixels). Otherwise the comparison has to include looking at \"image equivalents\"
Nov 27, 2009 at 03:45 PM
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