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Re: [OM] The Seamy Underbelly [and still HDR question]

Subject: Re: [OM] The Seamy Underbelly [and still HDR question]
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Fri, 01 Feb 2013 15:24:32 -0500
Does this mean that I should feed raw files to "merge to HDR" and do 
exposure corrections afterward?

Chuck Norcutt


On 1/31/2013 7:04 PM, usher99@xxxxxxx wrote:
> If a Camera Raw file is saved to a JPEG or other non-Camera Raw file
> format, the pixels are saved with the tonal adjustments applied by the
> camera raw processing application, but the exposure metadata is not
> changed. This means that Photoshop cannot assume that the exposure
> metadata is valid for the pixels in the image. Photoshop guesses the
> tonal range for the image based on the exposure metadata, but if the
> pixel values differ significantly from the unaltered camera raw pixels,
> the tonal range of the HDR file is sometimes incorrect.
>
> This problem does not occur with JPEG files generated by the camera
> when the image is taken, because the metadata written with the JPEG
> file contains the correct exposure values for the pixels in the image."
>
> I am not sure I totally understand the second to last paragraph and
> perhaps it is me, but it gives me a headache. But, but,  I want to fine
> tune the lens aberration correction in ACR, harumph.
-- 
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