That is same as what I have seen, Olympus Master/Studio and Canyon DPP are
not doing highlight recovery, even you reduce the exposure in the converter
and save the file as 48bit TIFF does not help. ACR, Phase One and Silkpix
(could be others too) do highlight recovery and I only use them for over
exposed images. Yes, there is no magic, as someone pointed out there is no
guarantee of color accuracy for recovered areas. The softwares perform
differently for different images, so for the important images I will try
them all to see which do better.
C.H.Ling
----- Original Message -----
From: "Jez Cunningham"
> Ken said:
>
> There is nothing magical to "highlight recovery". It is nothing more than
> automated curves adjustment.
>
> I seem to recall a podcast interview with one of the PS gurus (Thomas
> someone) who talked about the algorithms they had been working on to
> interpolate a blown channel based on what was left in the remaining
> channels.
>
> Yes, I think curves/levels might be only a poor man's substitute.
> Best regds
> Jez
>
>
> Sent from my Nokia phone
> -----Original Message-----
> From: Ken Norton
> Sent: 16/11/2009 21:53:40
> Subject: Re: [OM] ACR in PSE 8.0 was: Who in the world writes this
> junk? - Raw software rant.
>
>>
>> This is so annoying, as I would still like to be able to use the
>> highlight recovery options in ACR, which is often the reason I am
>> developing an ORF. Either to correct WB and/or highlight recovery. I
>> don't see where I have that capability to recover highlights at all in
>> Olympus Master 2 except to underexpose.
>>
>
> There is nothing magical to "highlight recovery". It is nothing more than
> automated curves adjustment. If you convert to 48-bit format and apply
> curves to that you can end up with the same result--just not as easily.
> Highlight recovery does not actually do anything in the process of
> converting the RAW file itself, but applies the settings to the RAW to
> internal format after the conversion algorithm has been run.
>
> In nearly any converter you can just do your conversion to protect the
> highlights (essentially underexposing the picture) and then apply a single
> upward arching curve adjustment to bring the midtones back to proper
> exposure. This is the poor-man's highlight recovery method.
>
> Personally, I have only seen these red and blue etchings when converting
>> to jpeg with ACR in PSE 8.0.
>>
>
> This leads me to believe that ACR's demoisiacing algorithm isn't
> processing
> the RAW file correctly and/or is internally converting to 24-bit mode
> without preserving dynamic range.
>
> The more I've been learning about these algorithms and sensor design the
> more interested I am. This is not a static technology, that's for sure.
> Even Olympus in Studio1 brought out the "High-Function" converter which
> used
> a different algorithm than what was in the cameras themselves and in
> Master. Apparently, Studio2 uses "High Function" as the only algorithm
> now
> and the improvements over the in-camera converter (for earlier E-bodies)
> is
> very noticable.
>
> I'm seeing reports from the Lightroom Beta users that the converter has
> been
> changed and is producing images similar to SilkPix which utilized a
> totally
> different type of algorithm.
>
--
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