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handling of Canon picture styles in RAW

 
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Alex Ray



Joined: 15 Aug 2006
Posts: 2

PostPosted: Tue Aug 15, 2006 2:29 pm    Post subject: handling of Canon picture styles in RAW Reply with quote

Newbie poster here!

I've just started using IVMP but have used PSCS2 and C1 for ages.

Does anyone have the lowdown on how IVMP handles Canon RAWs that have a picture style embedded in them?

what I know so far:

1. the style is stored as an EXIF tag
2. Rendering using 'manufacturer' raw processing gives me images and thumbs using the style, 'Apple' processing doesn't.

what i don't understand:

1. Why can't IVMP see the picture style tag?
2. If i use canon DPP to change an image's style, IVMP doesn't reflect the change.
3. I can't change the style in IVMP (I assume just changing the tag will force the 'manufacturer' processing to use the new tag).

Anyone have any insights?

TIA
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roberte



Joined: 18 Jun 2004
Posts: 2147
Location: Sydney, Australia

PostPosted: Tue Aug 15, 2006 9:52 pm    Post subject: Reply with quote

Hi Alex,

I too tried to work out how to get this to work. In the end I reckon it's Canon DPP causing the problem.

Here's why. With other manufacturer's RAW converters you can embed new thumbnails and previews when you save new settings. For example save an NEF in Nikon Capture or a DNG in Photoshop CS2.

Nikon and Adobe also save instruction settings that store your adjustments. AFAIK Canon save the adjustment settings (Picture Styles) but don't update the thumbnail or preview. Or rather I couldn't see how to in DPP.

iView uses the embedded JPEG preview for fast display of RAW formats. If that preview is the same as the one at capture then that's what you will see.
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Expression Media 2 / Windows 8 / Mac OS X 10.10
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Alex Ray



Joined: 15 Aug 2006
Posts: 2

PostPosted: Wed Aug 16, 2006 9:37 am    Post subject: Reply with quote

I agree, but i had expected that if i changed the settings in DPP and then told IVMP to rebuild the item (with rendering set to manufacturer), it would look at the RAW and re-process it with the new settings.
I have also told IVMP to ignore embeded thumbs.

And there was me thinking iPhoto was quirky!

:-)

Alex
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roberte



Joined: 18 Jun 2004
Posts: 2147
Location: Sydney, Australia

PostPosted: Wed Aug 16, 2006 10:21 am    Post subject: Reply with quote

Hi Alex,

I think the key word in your last post is manufacturer. Canon supply the SDK for their undocumented format, as does Nikon, so iView and other software vendors using it rely on the camera manufacturers software. If Canon decide not to have their SDK interpret Picture Styles that's their prerogative.

I really hope I'm wrong and there is a simple preference setting in DPP that does embed new previews or their SDK does indeed read Picture Styles.
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Expression Media 2 / Windows 8 / Mac OS X 10.10
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