Hi,
I had a look at the XMP specs – e.g. JPEG thumbnails are stored as a base64
text string inside the XMP. darktable could do the same for a grayscale mask
PNG or something like that. You might define a “darktable” namespace and e.g.
an array to hold masks and their locations.
I don’t know if this is practical though, it might bloat the XMP file.
Alternatively, you may store an URI referencing the masks via a relative path,
but that makes moving the images slightly more cumbersome – one would need to
move not only DSC_101.nef and DSC_101.nef.xmp, but also DSC_101.nef.masks
IMHO both is acceptable to get nice raster masks – but of course, I’m not a
developer, that’s not for me to say, darktable is great as it is.
Cheers
Michael
Von: alic VB [mailto:[email protected]]
Gesendet: Freitag, 9. Januar 2015 09:09
An: Robert William Hutton
Cc: [email protected]
Betreff: Re: [Darktable-users] Luminosity Masks in Darktable?
Hi,
This as already been discussed may times.
The (main) problem with the idea above is that it would require to create a
raster mask from the parametric one (parametric -> vector drawn mask is
impossible in most cases). And this is not an option as we have to store it in
xmp.
Aldric
2015-01-09 0:02 GMT+01:00 Robert William Hutton <[email protected]>:
On 08/01/15 20:16, Rob Z. Smith wrote:
> I guess what we would need would be some sort of 'create drawn mask from
> parametric' button to allow a static and reusable mask?
Something like that, though I don't see an easy way to do that that
would still be compatible with embedding the history stack in the
xmp/jpg. Though I'm not a developer, so what would I know? ;)
-R
>
> -----Original Message-----
> From: Robert William Hutton [mailto:[email protected]]
> Sent: 08 January 2015 02:33
> To: [email protected]
> Subject: Re: [Darktable-users] Luminosity Masks in Darktable?
>
> On 08/01/15 13:14, Mueen Nawaz wrote:
>> Oh, I see. You're saying that some modules use LAB whereas others use
>> RGB, so you can't swap masks from one to the other.
>
> More than that, the modules are connected together in a sequential pipeline,
> so each module has its input affected by the previous modules in the pipe.
> Therefore, if you apply the same parametric mask settings to two modules in
> sequence, the second module will give you a different mask because it builds
> the mask off what is effectively a different image (i.e. its input image is
> the output image of the previous module).
>
> IIRC, you can see the module order in the "modules used in the active pipe"
> group, which has the power button icon.
>
> HTH,
>
> Cheers,
>
> Rob
>
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