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VIP
Posts: 11,226
Registered: ‎12-07-2012

Re: Prefix file name underscore versus 8

[ Edited ]

Here is another way to think about DPP4 and the others remaps or changes the curve, not the colors. ONLY on the screen or monitor.

 

This is very important, "when you are processing the file to print with an Adobe RGB compatable printer."  Like I said earlier that is usually, actually all the time, only a photo printer.  Not just the office color printer.  They are certainly sRGB printers.

EOS 1DX and 1D Mk IV, even less and less other stuff.
Esteemed Contributor
Posts: 4,985
Registered: ‎06-25-2014

Re: Prefix file name underscore versus 8


@ebiggs1 wrote:

"...not for DPP. DPP uses no "tag file", and does allow you to save back to the RAW file..."

 

I do use DPP4 on sporadic occasions. I am not a real knowledgeable DPP4 user true but DPP4 does use a tag or meta file.  It is very unlikely it files color space back to the Raw file. I know DPP4 can save to a Raw file but not color space.

Raw files have no color space, DPP displays data from the Raw file in the selected color space set in the camera just like any other post editor.  When you change the color space the Raw file will be reinterpreted into the new color space. But that is not saved back to the Raw file.  If it did it could never be changed if you set a smaller CS and wanted a larger one.  I.E. saved sRGB and want AdobeRGB.

 

You can set DPP4 to 1 of 5 color spaces. By default it is set to sRGB which has the smallest gamut.  The CS is defined to display or print but the CS isn't set in stone until you actually export the file to a jpg or tiff.  Up to that point you haven't really converted or altered anything.

 

My practice is to set the camera to AdobeRGB.  I only shoot  Raw. I don't save a jpg along with it.  That isn't necessary 99% of the time. If I am printing I leave it. If it goes to social media I change to sRGB as a jpg.


No, DPP4 doesn't use a tag or meta file; all metadata are stored in the RAW file itself. It may use a temporary file during the editing process; but if it does, that file is not saved after the edit is complete.

 

I'm not sure whether the user's color space preference is among the metadata saved in the RAW file. I think it probably is, but I haven't had time to verify that. I'll try to remember to check it out the next time I do some editing. But in any case, saving the user's preference does not mean changing the RAW data itself. Ernie is of course correct that the RAW data remain unaltered.

Bob
Philadelphia, Pennsylvania USA
VIP
Posts: 11,226
Registered: ‎12-07-2012

Re: Prefix file name underscore versus 8

"DPP4 doesn't use a tag or meta file;"

 

It does use a meta file. WHere or how it does is the question.

EOS 1DX and 1D Mk IV, even less and less other stuff.
VIP
Posts: 8,199
Registered: ‎08-13-2015

Re: Prefix file name underscore versus 8

“I m not sure whether the user's color space preference is among the metadata saved in the RAW file. I think it probably is, but I haven't had time to verify that. “

If you think about it for a second, it cannot be saved in the RAW file. The RAW file metadata is supposed to describe the RAW file, not some edits that someone made.
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"I don't rent software. I use Photoshop CS6, ACR 9.8 and Lightroom 6.8 ."
VIP
Posts: 11,226
Registered: ‎12-07-2012

Re: Prefix file name underscore versus 8

"The RAW file metadata is supposed to describe the RAW file, not some edits that someone made."

 

WE AGREE!  Smiley Wink It is simply a matter of how each editor handles it but there is one.

EOS 1DX and 1D Mk IV, even less and less other stuff.
Highlighted
Esteemed Contributor
Posts: 4,985
Registered: ‎06-25-2014

Re: Prefix file name underscore versus 8


@Waddizzle wrote:
“I m not sure whether the user's color space preference is among the metadata saved in the RAW file. I think it probably is, but I haven't had time to verify that. “

If you think about it for a second, it cannot be saved in the RAW file. The RAW file metadata is supposed to describe the RAW file, not some edits that someone made.

The RAW file metadata is whatever Canon says it is. That's why Adobe is always behind the curve; they have to wait for Canon to tell them what's included in the latest RAW file format.

 

DPP's RAW files have always reliably included all the edits I've made (assuming that I remember to save the file when I'm done editing). And I have no reason to suppose that I've been getting some special treatment.

Bob
Philadelphia, Pennsylvania USA
Esteemed Contributor
Posts: 4,985
Registered: ‎06-25-2014

Re: Prefix file name underscore versus 8


@ebiggs1 wrote:

"The RAW file metadata is supposed to describe the RAW file, not some edits that someone made."

 

WE AGREE!  Smiley Wink It is simply a matter of how each editor handles it but there is one.


Frankly, Gentlemen, if I've inadvertently done something to help bridge the gap between you, my day has not been wasted!  Smiley Happy

 

Well, actually, it has. I'm supposed to be spending my time cleaning out our old house so that we can complete our move to Philadelphia. But that's another story.

Bob
Philadelphia, Pennsylvania USA
VIP
Posts: 11,226
Registered: ‎12-07-2012

Re: Prefix file name underscore versus 8

'Adobe is always behind the curve; they have to wait for Canon to tell them what's included in the latest RAW file format."

 

Canon does not document how their Raw files work. Others will always be "behind the curve" because they have to analyse how they work.

 

"DPP's RAW files have always reliably included all the edits I've made... I have no reason to suppose that I've been getting some special treatment."

 

Sorry ya lost me on that one.  I suspect DPP4 works exactly for you as it does for everybody.

 

"... if I've inadvertently done something to help bridge the gap between you, my day has not been wasted!"

 

I don't mind being shown where I go wrong.  It happens and it will happen again, I'm sure.  However, I don't like rude so I bow out then.

EOS 1DX and 1D Mk IV, even less and less other stuff.
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