Resizing is an intrinsically incorrect way to test, since you are no longer looking at the pixels as produced by the sensor.
Instead, you are looking at the pixels produced by the resizing algorithm.
I was just giving it as an example of what would be a fair comparison for those who think that noise should be evaluated using resized images.
What reviewers should start doing is test resolutions using color charts at different ISOs - in addition to their B&W resolution tests at ISO 100.
A resolution chart with gray background and red/green lines will easily show the resolution degradation caused by noise.
I predict that the results of such tests will be dramatic and a lot of people will start questioning the usefulness of cramming more and more megapixels into sensors.
Nov 27, 2009 at 06:07 PM
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