Re: Raw conversion ..

"imbsysop" <imbsysop@xxxxxxxxx> wrote in message news:Xns9C95E9DE02575reguluswolbe@xxxxxxxxxxxxxxxx
eNo <grandepatzer@xxxxxxxxx> wrote in
news:2033b69d-a43d-4292-8c8d-dab6c47625dd@xxxxxxxxxxxxxxxxxxxxxxxxxxxx:

On Sep 28, 2:14 pm, imbsysop <imbsy...@xxxxxxxxx> wrote:
I have been wondering for some time..

Is there any info to what type of picture "format" raw is converted
in it
s
intermediate state ie before the user makes a decision to save it
under t
he
form of a known picture format? (jpg, tiff etc)
What I mean is .. raw => converted(=demosaic)=> picture in PP progr
am
"memory" .. so what picture "format" is this picture in?
TIA

I'm assuming you mean, what is the format being held in memory for
display. I'll speak for the Windows OS, for which I wrote a couple of
graphics applications (including a JPG viewer) some time ago.
Essentially, the image must be converted and held in memory in the
Windows API (GDI) Bitmap (BMP) format.

yep indeed ... are you sure about the BMP format? This seems the most
restrictive in terms of color tonalities and format flexibility ?


I haven't handled 16-bit per channel data, as that post-dates my
WinAPI programming days, but I imagine these days the Windows API
contains all the goodies for color handling of such images, as would
be needed to handle 12-bit and 14-bit RAW data. Adobe also has their
own color space, which I've read allows for more nuanced color
manipulation, but again, that extends beyond my nuts-and-bolts
experience. Once you are done editing the image, then the software
would map its internally stored data into whatever format you select
for output. I assume S/W written for other OS's would proceed along
similar lines.

Well I think the 12/14 bits raw matter is not relevant at this level
anymore in so far that the demosaic/conversion has been done before it is
even possible to "see" anything that looks like a real picture .. but is
the conversion outcome a 16 bit format aka 16bit x3 color depth? I guess
so.

So does it make sense to suppose that initially this intermediate format
is "proprietary" to the used program and highest resolution, color depth?

Thanks everyone for your input. The Q was raised in some other (foreign)
forum where people claimed they applied noise reduction to the raw
file/data ..


(To me this is a foreign forum :-) )
DxO (www.dxo.com) claims to apply noise reduction to the raw data.

.

Relevant Pages

  • Re: RAW vs JPEGs - Does RAW show more detail?
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  • Re: RAW or not RAW? :)
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