Re: [darktable-user] Focuspoints

[Tobias Ellinghaus]

Am Montag, 5. Februar 2018, 19:38:50 CET schrieb ternaryd:
> On Mon, 05 Feb 2018 15:00:19 +0100
> 
> Tobias Ellinghaus  wrote:
> > Am Montag, 5. Februar 2018, 08:49:34 CET
> 
> schrieb ternaryd:
> > No that is not possible in any clean way. It
> > has been asked for a few times in the past
> > but so far no one was interested enough to
> > provide a patch that would add that.
> 
> May I ask, what would break?

Nothing I hope. It's just that none of the devs think this is a feature worth 
the time and effort to write code for. So either someone who actually wants it 
steps up and provides the code, or it won't happen.

> > PS: In case you wonder, the dirty way is to
> > add a Lua guide to the cropping module and
> > from there call to command line exiv2/exiftool
> > to get the data and then draw it.
> 
> I was thinking more of an analogy to the
> indication of sharpness in lighttable (ctrl-z).
> This would mean a similar drawing, but a way
> simpler task of finding the spots, which must
> be really hard when qualifying image detail.
> 
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Re: [darktable-user] Focuspoints

[ternaryd]

On Mon, 5 Feb 2018 21:40:30 +0100
KOVÁCS István  wrote:

> I think the focus points recorded in the
> image are often irrelevant, e.g. if you use
> focus-then-recompose.

I guess you are right; this is rather pointless
for cameras not allowing to choose one or
several focus points.

> (I realise this is less of an issue with
> touchscreen focus on MILC and images taken
> with a phone).

I don't use those, but you seem right again.

But in my case, a side effect would be to
detect back/front focus with some lenses more
easily, because, at least in my case, there is
so much time between taking the shot and seeing
it in darktable, that I wouldn't always recall
my settings.

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Re: [darktable-user] Focuspoints

[KOVÁCS István]

I think the focus points recorded in the image are often irrelevant, e.g.
if you use focus-then-recompose. The focus data in the image would probably
show the central focus point, which may easily point at the background by
the time the picture is taken. (I realise this is less of an issue with
touchscreen focus on MILC and images taken with a phone).

Kofa

On 5 Feb 2018 19:39, "ternaryd"  wrote:

On Mon, 05 Feb 2018 15:00:19 +0100
Tobias Ellinghaus  wrote:

> Am Montag, 5. Februar 2018, 08:49:34 CET
schrieb ternaryd:

> No that is not possible in any clean way. It
> has been asked for a few times in the past
> but so far no one was interested enough to
> provide a patch that would add that.

May I ask, what would break?

> PS: In case you wonder, the dirty way is to
> add a Lua guide to the cropping module and
> from there call to command line exiv2/exiftool
> to get the data and then draw it.

I was thinking more of an analogy to the
indication of sharpness in lighttable (ctrl-z).
This would mean a similar drawing, but a way
simpler task of finding the spots, which must
be really hard when qualifying image detail.

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Re: [darktable-user] Focuspoints

[darktable]

On Mon, 5 Feb 2018 19:38:50 +0100
ternaryd  wrote:

>I was thinking more of an analogy to the
>indication of sharpness in lighttable (ctrl-z).
>This would mean a similar drawing, but a way
>simpler task of finding the spots, which must
>be really hard when qualifying image detail.

This is going to very very hard, because each manfacturer and family
of camera has a different way of indicating the focus.

* fuji uses the pixel that was focused on: 
Focus Pixel: 1028 306

* canon uses the focus array, which one were in focus: 

AF Points In Focus  : 21,24,25,39
AF Points Selected  : 0,1,2,3,15,18,19,20,21,22,24,25,37,38,39

-- 
sknahT

vyS

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Re: [darktable-user] Focuspoints

[ternaryd]

On Mon, 05 Feb 2018 15:00:19 +0100
Tobias Ellinghaus  wrote:

> Am Montag, 5. Februar 2018, 08:49:34 CET
schrieb ternaryd:

> No that is not possible in any clean way. It
> has been asked for a few times in the past
> but so far no one was interested enough to
> provide a patch that would add that.

May I ask, what would break?

> PS: In case you wonder, the dirty way is to
> add a Lua guide to the cropping module and
> from there call to command line exiv2/exiftool
> to get the data and then draw it.

I was thinking more of an analogy to the
indication of sharpness in lighttable (ctrl-z).
This would mean a similar drawing, but a way
simpler task of finding the spots, which must
be really hard when qualifying image detail.

darktable user mailing list
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Re: [darktable-user] Focuspoints

[Tobias Ellinghaus]

Am Montag, 5. Februar 2018, 08:49:34 CET schrieb ternaryd:
> Hi,
> 
> The Exif files as provided by my Nikon includes
> the selected focus point(s). When looking at the
> images in the camera, I can choose to display
> them. Is there a way to do the same in
> darktable?
> 
> If not, would it be possible to have sort of an
> overlay which can be switched on and off, maybe
> drawing it from the exif data with some lua
> script?

No that is not possible in any clean way. It has been asked for a few times in 
the past but so far no one was interested enough to provide a patch that would 
add that.

> Thanks,

Tobias

PS: In case you wonder, the dirty way is to add a Lua guide to the cropping 
module and from there call to command line exiv2/exiftool to get the data and 
then draw it.

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Re: [darktable-user] Focuspoints

[Patrick Shanahan]

* ternaryd  [02-05-18 02:50]:
> Hi,
> 
> The Exif files as provided by my Nikon includes
> the selected focus point(s). When looking at the
> images in the camera, I can choose to display
> them. Is there a way to do the same in
> darktable?
> 
> If not, would it be possible to have sort of an
> overlay which can be switched on and off, maybe
> drawing it from the exif data with some lua
> script?

in your ~/.config/keyboardrc:
  ; (gtk_accel_path "/views/lighttable/preview with focus detection" 
"z")
  ; (gtk_accel_path "/modules/live_view/move focus point out (big 
steps)" "")
  ; (gtk_accel_path "/modules/live_view/move focus point in (big 
steps)" "")
  ; (gtk_accel_path "/modules/live_view/move focus point out (small 
steps)" "")
  ; (gtk_accel_path "/modules/live_view/move focus point in (small 
steps)" "")
  (gtk_accel_path "/views/lighttable/sticky preview with focus 
detection" "semicolon")

and http://www.darktable.org/2013/11/determining-focus-in-lighttable/
  
-- 
(paka)Patrick Shanahan   Plainfield, Indiana, USA  @ptilopteri
http://en.opensuse.orgopenSUSE Community Memberfacebook/ptilopteri
Registered Linux User #207535@ http://linuxcounter.net
Photos: http://wahoo.no-ip.org/piwigo   paka @ IRCnet freenode

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