MRW (7D version) to DNG conversion

Archived from groups: rec.photo.digital (More info?)

On Fri, 31 Dec 2004 20:08:58 GMT, steven wrote:

> Hi,
> I'm looking for a MRW (Minolta RAW) to DNG converter. None of those I found
> (including Adobe DNG converter dd. 2004-09-26) seem to be able to 1) read
> MRW Dynax 7D version, AND 2) write DNG.
> I thought PolyImage (http://www.polybytes.com/) was gonna help me out, but
> it can only *read* DNG. :-(
> Did I overlook something?
> (Sorry if this question was asked and answered before)
>
> Steven
>
> PS: I wouldn't mind writing my own converter, but Adobe's "complete" (sic)
> DNG specification looks pretty incomplete to me: all tags are described
> alright, but not the file structure. For MRW I have a much more complete
> document.

It will be released with ACR 2.4, currently in beta. There's no beta version
of the DNG converter available.

DNG is TIFF format.

--
John Bean

Part of the inhumanity of the computer is that, once it is competently
programmed and working smoothly, it is completely honest (Isaac Asimov)

Archived from groups: rec.photo.digital (More info?)

"John Bean" <waterfoot@gmail.com> wrote in message
news:1kk5t68wntfno$.dlg@waterfoot.net...
> On Fri, 31 Dec 2004 20:08:58 GMT, steven wrote:
>
> > Hi,
> > I'm looking for a MRW (Minolta RAW) to DNG converter. None of those I
found
> > (including Adobe DNG converter dd. 2004-09-26) seem to be able to 1)
read
> > MRW Dynax 7D version, AND 2) write DNG.
> > I thought PolyImage (http://www.polybytes.com/) was gonna help me out,
but
> > it can only *read* DNG. :-(
> > Did I overlook something?
> > (Sorry if this question was asked and answered before)
> >
> > Steven
> >
> > PS: I wouldn't mind writing my own converter, but Adobe's "complete"
(sic)
> > DNG specification looks pretty incomplete to me: all tags are described
> > alright, but not the file structure. For MRW I have a much more complete
> > document.
>
> It will be released with ACR 2.4, currently in beta. There's no beta
version
> of the DNG converter available.

Do'h! Overlooked that. ACR2.4 opens MWR alright, but as it doesn't save DNG
so my problem basically remains. :-(

>
> DNG is TIFF format.

Do you mean as far as the payload is concerned? I find tags in the DNG spec
which aren't in TIFF. Also, If DNG == TIFF, why "devise" DNG in the first
place?
Thanks anyway for your reply.

--
Steven
"Don't worry Carlucci, I still love you" (Avanti!)

Archived from groups: rec.photo.digital (More info?)

On Sat, 01 Jan 2005 11:04:19 GMT, steven wrote:

> "John Bean" <waterfoot@gmail.com> wrote in message
> news:1kk5t68wntfno$.dlg@waterfoot.net...
>> On Fri, 31 Dec 2004 20:08:58 GMT, steven wrote:
>>
>>> Hi,
>>> I'm looking for a MRW (Minolta RAW) to DNG converter. None of those I
> found
>>> (including Adobe DNG converter dd. 2004-09-26) seem to be able to 1)
> read
>>> MRW Dynax 7D version, AND 2) write DNG.
>>> I thought PolyImage (http://www.polybytes.com/) was gonna help me out,
> but
>>> it can only *read* DNG. :-(
>>> Did I overlook something?
>>> (Sorry if this question was asked and answered before)
>>>
>>> Steven
>>>
>>> PS: I wouldn't mind writing my own converter, but Adobe's "complete"
> (sic)
>>> DNG specification looks pretty incomplete to me: all tags are described
>>> alright, but not the file structure. For MRW I have a much more complete
>>> document.
>>
>> It will be released with ACR 2.4, currently in beta. There's no beta
> version
>> of the DNG converter available.
>
> Do'h! Overlooked that. ACR2.4 opens MWR alright, but as it doesn't save DNG
> so my problem basically remains. :-(

No, nothing except the stand-alone converter will save DNG. PS9 and ACR 3.x
will no doubt address this.
>
>>
>> DNG is TIFF format.
>
> Do you mean as far as the payload is concerned? I find tags in the DNG spec
> which aren't in TIFF. Also, If DNG == TIFF, why "devise" DNG in the first
> place?

No, I mean as far as the container is concerned. TIFF file format is a
container, DNG is a TIFF whose contents are used in a specialised way as
defined by the Adobe specification. TIFF tags are designed to be extensible
and those formats whose contents differ from "standard" TIFF in major ways
usually use their own extension to avoid confusion. Several existing camera
raw formats do exactly this, Pentax PEF and Nikon NEF for example. However
you'll find that any program that can parse a TIFF header and extract a
thumbnail (if one exists) will be able to do this equally well with DNG,
NEF, PEF, TIF...

I suggest you read up on TIFF formats, maybe Adobe's DNG specification will
become clearer.

--
John Bean

I think computer viruses should count as life. I think it says something
about human nature that the only form of life we have created so far is
purely destructive. We've created life in our own image (Stephen Hawking)

Archived from groups: rec.photo.digital (More info?)

In message <1kk5t68wntfno$.dlg@waterfoot.net>,
John Bean <waterfoot@gmail.com> wrote:

>DNG is TIFF format.

The DNG files contain a TIFF thumbnail, but the RAW data itself is just
that - RAW data.
--

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