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Forums > Back > High ISO noise vs under exposure correction (RAW)
PuxaVida
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#24
03-07-2011, 12:23 PM
[quote name='allanmb' timestamp='1299498793' post='6570']

I dont know what you mean by untwisted profiles but in my test images, the contrast/brightness/saturation/recovery/blacks sliders were exactly the same for both images - I didnt use 'auto'.

[/quote]



The "twisted color profiles" is an expression Walter pointed out, which is used for standart color profiles of ACR. When I push up exposure in ACR, it's not only the brightness which is adjusted. ACR does other manipulations on the image, and maybe this is why I've seen a big difference between two images with the following exif data:



f/5.6, 1/640, ISO 800

f/5.6, 1/640, ISO 200



On the image with ISO=200, the exposure was pushed up (+2) in ACR to have the same brightness with ISO 800 image (and nothing else was touched). The resulting image was clearly worse than the ISO 800 image in terms of IQ. It has more noise, over-saturated colors with high contrast and also has a less DR.



Serkan
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Messages In This Thread
High ISO noise vs under exposure correction (RAW) - by btlnorway - 02-28-2011, 08:35 PM
High ISO noise vs under exposure correction (RAW) - by Guest - 03-01-2011, 02:25 PM
High ISO noise vs under exposure correction (RAW) - by Guest - 03-01-2011, 09:34 PM
High ISO noise vs under exposure correction (RAW) - by allanmb - 03-02-2011, 09:29 AM
High ISO noise vs under exposure correction (RAW) - by PuxaVida - 03-02-2011, 10:07 AM
High ISO noise vs under exposure correction (RAW) - by PuxaVida - 03-02-2011, 01:33 PM
High ISO noise vs under exposure correction (RAW) - by Guest - 03-02-2011, 01:38 PM
High ISO noise vs under exposure correction (RAW) - by PuxaVida - 03-02-2011, 03:06 PM
High ISO noise vs under exposure correction (RAW) - by Guest - 03-03-2011, 11:07 AM
High ISO noise vs under exposure correction (RAW) - by allanmb - 03-04-2011, 08:36 PM
High ISO noise vs under exposure correction (RAW) - by PuxaVida - 03-05-2011, 12:24 PM
High ISO noise vs under exposure correction (RAW) - by Guest - 03-05-2011, 12:51 PM
High ISO noise vs under exposure correction (RAW) - by PuxaVida - 03-05-2011, 01:07 PM
High ISO noise vs under exposure correction (RAW) - by Guest - 03-05-2011, 01:21 PM
High ISO noise vs under exposure correction (RAW) - by allanmb - 03-05-2011, 08:02 PM
High ISO noise vs under exposure correction (RAW) - by Guest - 03-05-2011, 08:08 PM
High ISO noise vs under exposure correction (RAW) - by PuxaVida - 03-06-2011, 02:45 PM
High ISO noise vs under exposure correction (RAW) - by Guest - 03-06-2011, 05:42 PM
High ISO noise vs under exposure correction (RAW) - by PuxaVida - 03-07-2011, 08:40 AM
High ISO noise vs under exposure correction (RAW) - by allanmb - 03-07-2011, 11:53 AM
High ISO noise vs under exposure correction (RAW) - by PuxaVida - 03-07-2011, 12:23 PM
High ISO noise vs under exposure correction (RAW) - by allanmb - 03-07-2011, 02:23 PM
High ISO noise vs under exposure correction (RAW) - by genotypewriter - 03-08-2011, 02:06 AM
High ISO noise vs under exposure correction (RAW) - by PuxaVida - 03-08-2011, 07:35 AM

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