What's the easiest way to lighten some underexposed pictures?

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What's the easiest way to lighten some underexposed pictures?

Chris Green
I have a dozen or so pictures taken with my Fuji S8000fd which are
somewhat dark because I left the camera set on the 'Sunset' position
by mistake.  By the looks of the pictures all that the Sunset setting
does is to underexpose by a stop or so.

What is the *simplest* way to simply lighten the pictures somewhat
using Digikam?  I don't want to spend hours on each image trying to
get the best out of it as they're not incredibly important but it
would be good to just make them a bit better to look at.

If it's relevant I particularly need to lighten the darkest areas a
bit because some of the pictures are of black kittens (they're not "in
a coal cellar" though!).

--
Chris Green

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Re: What's the easiest way to lighten some underexposed pictures?

Mark Greenwood-2
On Friday 02 Oct 2009 15:33:35 Chris G wrote:

> I have a dozen or so pictures taken with my Fuji S8000fd which are
> somewhat dark because I left the camera set on the 'Sunset' position
> by mistake.  By the looks of the pictures all that the Sunset setting
> does is to underexpose by a stop or so.
>
> What is the *simplest* way to simply lighten the pictures somewhat
> using Digikam?  I don't want to spend hours on each image trying to
> get the best out of it as they're not incredibly important but it
> would be good to just make them a bit better to look at.
>
> If it's relevant I particularly need to lighten the darkest areas a
> bit because some of the pictures are of black kittens (they're not "in
> a coal cellar" though!).
>
>
Try the curves tool - give the curve a bit of a 'bump' at the bottom left.

Mark
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Re: What's the easiest way to lighten some underexposed pictures?

Gilles Caulier-4
Try auto color correction tool in editor...

Gilles

2009/10/2 Mark Greenwood <[hidden email]>:

> On Friday 02 Oct 2009 15:33:35 Chris G wrote:
>> I have a dozen or so pictures taken with my Fuji S8000fd which are
>> somewhat dark because I left the camera set on the 'Sunset' position
>> by mistake.  By the looks of the pictures all that the Sunset setting
>> does is to underexpose by a stop or so.
>>
>> What is the *simplest* way to simply lighten the pictures somewhat
>> using Digikam?  I don't want to spend hours on each image trying to
>> get the best out of it as they're not incredibly important but it
>> would be good to just make them a bit better to look at.
>>
>> If it's relevant I particularly need to lighten the darkest areas a
>> bit because some of the pictures are of black kittens (they're not "in
>> a coal cellar" though!).
>>
>>
> Try the curves tool - give the curve a bit of a 'bump' at the bottom left.
>
> Mark
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> Digikam-users mailing list
> [hidden email]
> https://mail.kde.org/mailman/listinfo/digikam-users
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Re: What's the easiest way to lighten some underexposed pictures?

gerlos
In reply to this post by Chris Green
On venerdì 02 ottobre 2009 16:33:35, Chris G wrote:
> I have a dozen or so pictures taken with my Fuji S8000fd which are
> somewhat dark because I left the camera set on the 'Sunset' position
> by mistake.  By the looks of the pictures all that the Sunset setting
> does is to underexpose by a stop or so.
>
> What is the *simplest* way to simply lighten the pictures somewhat
> using Digikam?  I don't want to spend hours on each image trying to
> get the best out of it as they're not incredibly important but it
> would be good to just make them a bit better to look at.

Maybe the "right" tool for this kind of things is the batch queue manager from the latest digikam release, but afaik the only tool you may find useful for your purpose is the automatic color correction tool, that may do what you need or not, it depends on the images. It would be nice if we could use the curves tool in the batch queue manager, but it not seems possible at the moment.

Another way, is just to open the first image in the editor, do the changes you need for example using the curves or the leves tool, save and then move to the second image, using PageUp or PageDown or the arrow buttons in the toolbar. If you try to open the same tool in the next image, you will see that the settings are the same of the previous, so you just need to click "OK" to apply the changes. This way you just open the image, apply the changes, save and go to the next. Maybe not the fastest and most elegant way of doing, but it should work.

There are a lot of other ways to get the same result not using digikam, for example you could use imagemagick from the command line or script gimp. For a gui tool you can try Phatch (http://photobatch.stani.be/); I didn't try it, but seems easy and useful.

regards
gerlos

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else. The trick is the doing something else."
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Re: What's the easiest way to lighten some underexposed pictures?

Chris Green
In reply to this post by Mark Greenwood-2
On Fri, Oct 02, 2009 at 03:58:27PM +0100, Mark Greenwood wrote:

> On Friday 02 Oct 2009 15:33:35 Chris G wrote:
> > I have a dozen or so pictures taken with my Fuji S8000fd which are
> > somewhat dark because I left the camera set on the 'Sunset' position
> > by mistake.  By the looks of the pictures all that the Sunset setting
> > does is to underexpose by a stop or so.
> >
> > What is the *simplest* way to simply lighten the pictures somewhat
> > using Digikam?  I don't want to spend hours on each image trying to
> > get the best out of it as they're not incredibly important but it
> > would be good to just make them a bit better to look at.
> >
> > If it's relevant I particularly need to lighten the darkest areas a
> > bit because some of the pictures are of black kittens (they're not "in
> > a coal cellar" though!).
> >
> >
> Try the curves tool - give the curve a bit of a 'bump' at the bottom left.
>
Yes, that seems to be fairly easy, thanks.

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Re: What's the easiest way to lighten some underexposed pictures?

Chris Green
In reply to this post by Gilles Caulier-4
On Fri, Oct 02, 2009 at 05:13:43PM +0200, Gilles Caulier wrote:
> Try auto color correction tool in editor...
>
I tried that and it didn't seem to do too much, except for "Equalize"
which messed things up completely.

>
> 2009/10/2 Mark Greenwood <[hidden email]>:
> > On Friday 02 Oct 2009 15:33:35 Chris G wrote:
> >> I have a dozen or so pictures taken with my Fuji S8000fd which are
> >> somewhat dark because I left the camera set on the 'Sunset' position
> >> by mistake.  By the looks of the pictures all that the Sunset setting
> >> does is to underexpose by a stop or so.
> >>
> >> What is the *simplest* way to simply lighten the pictures somewhat
> >> using Digikam?  I don't want to spend hours on each image trying to
> >> get the best out of it as they're not incredibly important but it
> >> would be good to just make them a bit better to look at.
> >>
> >> If it's relevant I particularly need to lighten the darkest areas a
> >> bit because some of the pictures are of black kittens (they're not "in
> >> a coal cellar" though!).
> >>
> >>
> > Try the curves tool - give the curve a bit of a 'bump' at the bottom left.
> >
> > Mark
> > _______________________________________________
> > Digikam-users mailing list
> > [hidden email]
> > https://mail.kde.org/mailman/listinfo/digikam-users
> >
> _______________________________________________
> Digikam-users mailing list
> [hidden email]
> https://mail.kde.org/mailman/listinfo/digikam-users
>

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Re: What's the easiest way to lighten some underexposed pictures?

Chris Green
In reply to this post by gerlos
On Fri, Oct 02, 2009 at 05:18:32PM +0200, gerlos wrote:

> On venerdì 02 ottobre 2009 16:33:35, Chris G wrote:
> > I have a dozen or so pictures taken with my Fuji S8000fd which are
> > somewhat dark because I left the camera set on the 'Sunset' position
> > by mistake.  By the looks of the pictures all that the Sunset setting
> > does is to underexpose by a stop or so.
> >
> > What is the *simplest* way to simply lighten the pictures somewhat
> > using Digikam?  I don't want to spend hours on each image trying to
> > get the best out of it as they're not incredibly important but it
> > would be good to just make them a bit better to look at.
>
> Maybe the "right" tool for this kind of things is the batch queue manager from the latest digikam release, but afaik the only tool you may find useful for your purpose is the automatic color correction tool, that may do what you need or not, it depends on the images. It would be nice if we could use the curves tool in the batch queue manager, but it not seems possible at the moment.
>
> Another way, is just to open the first image in the editor, do the changes you need for example using the curves or the leves tool, save and then move to the second image, using PageUp or PageDown or the arrow buttons in the toolbar. If you try to open the same tool in the next image, you will see that the settings are the same of the previous, so you just need to click "OK" to apply the changes. This way you just open the image, apply the changes, save and go to the next. Maybe not the fastest and most elegant way of doing, but it should work.
>
> There are a lot of other ways to get the same result not using digikam, for example you could use imagemagick from the command line or script gimp. For a gui tool you can try Phatch (http://photobatch.stani.be/); I didn't try it, but seems easy and useful.
>
The curves tool seems to be the easiest way to get what I want, I can
cope with doing the images one at a time, there aren't *that* many of
them.

Thanks all.

--
Chris Green

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Re: What's the easiest way to lighten some underexposed pictures?

jdd@dodin.org
Chris G a écrit :

> The curves tool seems to be the easiest way to get what I want, I can
> cope with doing the images one at a time, there aren't *that* many of

I find the "gamma" tool also very friendly

jdd


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