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Canon A570 IS & RAW

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Offline PS

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Re: Canon A570 IS & RAW
« Reply #10 on: 22 / February / 2011, 21:06:09 »
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No processing will restore what's lost, so from technical POV RAW is 'the best quality' (this should apply to geometric distortions as well). Although masked distortions and other beautifiers may have subjective 'qualities' but it's not fair to call it better quality just because one finds it more pleasing.
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Offline waterwingz

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Re: Canon A570 IS & RAW
« Reply #11 on: 22 / February / 2011, 21:57:54 »
agreed
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Offline reyalp

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Re: Canon A570 IS & RAW
« Reply #12 on: 22 / February / 2011, 23:57:27 »
Quote from: PS on 22 / February / 2011, 21:06:09
No processing will restore what's lost, so from technical POV RAW is 'the best quality' (this should apply to geometric distortions as well).
This absurd. If by "quality" you mean anything to do with how humans perceive the image, then your claim is complete nonsense. If by quality you just mean the best source data for transformation to something humans perceive (or for analytical purposes that don't involve rendering an image), you have a point, but it's not what most people mean when they talk about image quality.

Modern compact cameras are designed with severe distortion in the lenses *because the designers knew they could correct it in software*.

For the purpose of accurately reproducing a scene *as a human would see it*, an image with the distortion uncorrected is clearly lower quality than an image in which the distortion has been corrected. Software cannot add back data that was never recorded, but it certainly can transform that data into something that provides a more accurate representation *to a human viewer*. You cannot correct barrel distortion in your head. A computer can, and to a human, the resulting image is undeniably a more accurate representation of the original scene.
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Offline PS

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Re: Canon A570 IS & RAW
« Reply #13 on: 23 / February / 2011, 13:46:18 »
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Offline waterwingz

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Re: Canon A570 IS & RAW
« Reply #14 on: 23 / February / 2011, 14:04:50 »
 :-X
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Offline reyalp

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Re: Canon A570 IS & RAW
« Reply #15 on: 23 / February / 2011, 16:14:53 »
« Last Edit: 23 / February / 2011, 16:20:01 by reyalp »
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Offline PS

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Re: Canon A570 IS & RAW
« Reply #16 on: 23 / February / 2011, 23:25:37 »
« Last Edit: 12 / April / 2011, 21:29:34 by PS »
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Offline reyalp

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Re: Canon A570 IS & RAW
« Reply #17 on: 24 / February / 2011, 00:24:49 »
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Offline waterwingz

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Re: Canon A570 IS & RAW
« Reply #18 on: 24 / February / 2011, 07:37:25 »
Quote from: reyalp on 24 / February / 2011, 00:24:49
Modern compacts are designed with this kind of 'problem' to give better zoom range or more compact package, because it can be adequately addressed in software.
Next thing you know,  we will be discussing whether mulitple element lenses give lower quality because they distort the image of a single element lense - which in turn distorts the perfect quality of the image from a pinhole camera.

But its probably time to stop feeding the trolls.
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Offline PS

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Re: Canon A570 IS & RAW
« Reply #19 on: 26 / February / 2011, 11:55:23 »
The quality of Hubble's images could have been improved by introduction of new data e.g. characteristics of distortions, from processing multiple frames etc. It wasn't equivalent of those tricks done in cameras, that only apply cosmetic changes and don't introduce new information.

@water...
If you have problem with this discussion, then find yourself another activity.
« Last Edit: 26 / February / 2011, 11:59:13 by PS »
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