OpenRAW based on CHDK - possible? - page 2 - RAW Shooting and Processing - CHDK Forum
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OpenRAW based on CHDK - possible?

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Offline dvornik

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Re: OpenRAW based on CHDK - possible?
« Reply #10 on: 04 / February / 2008, 02:48:38 »
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Quote from: mx3 on 04 / February / 2008, 02:35:09
and I'm really don't understand why would be needed converter for .DNG file?
any new image processing software can process these files

I suppose if I was happy with any of that software I wouldn't start this topic in the first place.  What works best for you?
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Offline dvornik

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Re: OpenRAW based on CHDK - possible?
« Reply #11 on: 04 / February / 2008, 02:59:58 »
And from a more practical point of view -  DNGs converted by different versions of DNG4PS-2 look different even in the same coverters. So Bible developers' point is valid - how the hell  would they know what a non-native DNG should look like?
« Last Edit: 04 / February / 2008, 03:02:24 by dvornik »
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Offline ArtDen

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Re: OpenRAW based on CHDK - possible?
« Reply #12 on: 04 / February / 2008, 03:29:55 »
Quote from: dvornik on 04 / February / 2008, 02:59:58
And from a more practical point of view -  DNGs converted by different versions of DNG4PS-2 look different even in the same coverters.
Different versions of DNG4PS-2 write different options in DNGs so images look different.

Quote from: dvornik on 04 / February / 2008, 02:59:58
So Bible developers' point is valid - how the hell  would they know what a non-native DNG should look like?
DNG is simple TIFF file (containing RAW data as image) with some additional tags for storing info about RAW. I think it is no problem for  Bible developers to make support for DNG.
« Last Edit: 04 / February / 2008, 03:31:34 by ArtDen »
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Offline mx3

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Re: OpenRAW based on CHDK - possible?
« Reply #13 on: 04 / February / 2008, 03:34:09 »
Quote from: dvornik on 04 / February / 2008, 02:48:38
What works best for you?
I'm shooting all in jpg and CRW mode. I have not used RAW files yet (one exclussion - I tryed to make HDR)
so I just krrping raw files for future use

Quote from: dvornik on 04 / February / 2008, 02:59:58
DNGs converted by different versions of DNG4PS-2 look different even in the same coverters. So Bible developers' point is valid - how the hell  would they know what a non-native DNG should look like?

I thought dng file contain all information about shoot
what is missing that don't allow to get right image?
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Offline vit40

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Re: OpenRAW based on CHDK - possible?
« Reply #14 on: 04 / February / 2008, 04:22:45 »
As far as I know, only information missing is As Shot WB, because there's no way to get it. Dng contains all other informations to get the picture, you only have to set WB manually

But there can be differences in color matrix (ArtDen updated matrices for some cameras recently), BaselineExposure value etc ...

Raw data from sensor are unchanged within dng, just compressed
« Last Edit: 04 / February / 2008, 04:24:42 by vit40 »
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Offline e2b

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Re: OpenRAW based on CHDK - possible?
« Reply #15 on: 04 / February / 2008, 09:13:08 »
Quote from: vit40 on 04 / February / 2008, 04:22:45
As far as I know, only information missing is As Shot WB, because there's no way to get it. Dng contains all other informations to get the picture, you only have to set WB manually
DNG4PS copies the exif data from the jpg to the dng file (thanks ArtDen for the improvements you made to this aspect of DNG4PS-2  :)). If the as-shot WB is auto, then Auto WB in processing the dng file is usually OK. If the WB is not Auto, then I refer back to the jpg.

(I should have said that I always keep the jpg so I can see what the as-shot picture looks like. It would be nice if the embedded thumbnail in the dng produced by DNG4PS matched the jpg ;).)
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Offline dvornik

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Re: OpenRAW based on CHDK - possible?
« Reply #16 on: 04 / February / 2008, 22:38:57 »
Quote from: ArtDen on 04 / February / 2008, 03:29:55
Different versions of DNG4PS-2 write different options in DNGs so images look different.

Well - that's sort of Bibble developers' point. If they are not sure how the file was created how can they be sure that their conversion to a bitmap image is accurate? Ultimately, they are not trying to create images that are just as good as in-camera jpgs but rather images significantly better than in-camera jpgs.
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Offline ArtDen

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Re: OpenRAW based on CHDK - possible?
« Reply #17 on: 04 / February / 2008, 23:56:41 »
Just don't use Bibble. If Bibble sales managers will understand they are losing money on photographers which prefer DNG, they make support for universal DNG.
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Offline dvornik

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Re: OpenRAW based on CHDK - possible?
« Reply #18 on: 05 / February / 2008, 00:47:01 »
I'm sorry but I believe they write  the best independant converter currently on the market.  It's obviously my personal preference.

When using Nikon DSLRs there's an option of Nikon Capture (which is highly propriatary but produces great results from NEFs). However with CHDK files there's no alternative to using independant converters.

The reason for my first post is that I don't think  DNG  is generally  accepted as a universal RAW format.
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Offline vit40

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Re: OpenRAW based on CHDK - possible?
« Reply #19 on: 05 / February / 2008, 01:32:40 »
Well, I don't know about current Bibble version, but tried one of the previous and would say it was worst raw converter I ever tried (my personal opinion, no hard feelings please)
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