Hi,

I remember that I revived some dark photos to normal look by simply
choosing certain gimp menus. Now I want to do it again, but couldn't find
the menu entry any more.

So I went ahead googling the answer, and it seems Normalize, Contrast
Auto-stretch and Auto-stretch HSV are three ways of doing it. But I believe
I've been to every corner of gimp menu, but didn't find a single clue where
those options could be. E.g., Contrast Autostretch should be at (Filters ->
Map -> Contrast Autostretch), but it's not there, in my gimp at least.

Are those tools excluded from the gimp release, because of recent tightening
the license issue?

If so, anybody is kind enough to show me how to get and install them myself?

thanks

tong

PS, Here are the gimp related package installed in my system:

ii gimp The GNU Image Manipulation Program
ii gimp-data Data files for The GIMP
ii grokking-the-gimp GIMP tutorial book by Carey Bunks (HTML)
ii libgimp2.0 Libraries necessary to Run the GIMP
ii libgtk1.2 The GIMP Toolkit set of widgets for X
ii libgtk2-perl Perl interface to the 2.x series of the Gimp Toolkit library

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On Jan 21, 6:30 pm, "][" <mlist4sunt...@yahoo.com> wrote:
> Hi,
>
> I remember that I revived some dark photos to normal look by simply
> choosing certain gimp menus. Now I want to do it again, but couldn't find
> the menu entry any more.
>
> So I went ahead googling the answer, and it seems Normalize, Contrast
> Auto-stretch and Auto-stretch HSV are three ways of doing it. But I believe
> I've been to every corner of gimp menu, but didn't find a single clue where
> those options could be. E.g., Contrast Autostretch should be at (Filters ->
> Map -> Contrast Autostretch), but it's not there, in my gimp at least.

Are they under Colors->Auto?


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On Monday 22 January 2007 17:32, a.list.address@gmail.com sent this for all
our perusal:
>---} On Jan 21, 6:30 pm, "][" <mlist4sunt...@yahoo.com> wrote:
>---} > Hi,
>---} >
>---} > I remember that I revived some dark photos to normal look by simply
>---} > choosing certain gimp menus. Now I want to do it again, but couldn't
> find ---} > the menu entry any more.
>---} >
>---} > So I went ahead googling the answer, and it seems Normalize, Contrast
>---} > Auto-stretch and Auto-stretch HSV are three ways of doing it. But I
> believe ---} > I've been to every corner of gimp menu, but didn't find a
> single clue where ---} > those options could be. E.g., Contrast Autostretch
> should be at (Filters -> ---} > Map -> Contrast Autostretch), but it's not
> there, in my gimp at least. ---}
>---} Are they under Colors->Auto?
>---}
>---}

Or Tools/Colour Tools I think?

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On Monday 22 January 2007 17:32, a.list.address@gmail.com sent this for all
our perusal:
>---} On Jan 21, 6:30 pm, "][" <mlist4sunt...@yahoo.com> wrote:
>---} > Hi,
>---} >
>---} > I remember that I revived some dark photos to normal look by simply
>---} > choosing certain gimp menus. Now I want to do it again, but couldn't
> find ---} > the menu entry any more.
>---} >
>---} > So I went ahead googling the answer, and it seems Normalize, Contrast
>---} > Auto-stretch and Auto-stretch HSV are three ways of doing it. But I
> believe ---} > I've been to every corner of gimp menu, but didn't find a
> single clue where ---} > those options could be. E.g., Contrast Autostretch
> should be at (Filters -> ---} > Map -> Contrast Autostretch), but it's not
> there, in my gimp at least. ---}
>---} Are they under Colors->Auto?
>---}
>---}
Layers/Colour I think..........

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it. .............................Henry David Thoreau
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][ wrote:
> I remember that I revived some dark photos to normal look by simply
> choosing certain gimp menus. Now I want to do it again, but couldn't
> find the menu entry any more.

As far as I think I know, in many photo editing programs, including
Gimp, it usually goes like this:

Tools > Colour tools > Levels...
Select Channel: Red; click 'Auto'
Select Channel: Green; click 'Auto'
Select Channel: Blue; click 'Auto'
Select Channel: Value; click 'Auto'

That should do it in most cases.
For grayscale photos, skip the colours.

For more 'difficult' cases, try to adjust the 'Input Levels' and
'Output Levels' in this same dialog, and/or try Tools > Colour Tools >
Curves..., e.g. to sharpen the contrast in the dark areas.


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On Sunday 21 January 2007 22:26, ][ wrote:
> Hi,
>
> I remember that I revived some dark photos to normal look by simply
> choosing certain gimp menus. Now I want to do it again, but couldn't find
> the menu entry any more.
>
> So I went ahead googling the answer, and it seems Normalize, Contrast
> Auto-stretch and Auto-stretch HSV are three ways of doing it. But I believe
> I've been to every corner of gimp menu, but didn't find a single clue where
> those options could be. E.g., Contrast Autostretch should be at (Filters ->
> Map -> Contrast Autostretch), but it's not there, in my gimp at least.
>
> Are those tools excluded from the gimp release, because of recent
> tightening the license issue?
>
> If so, anybody is kind enough to show me how to get and install them
> myself?
>
> thanks
>
> tong
>

http://docs.gimp.org/en/plug-in-retinex.html

[]'s


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On Mon, 22 Jan 2007 00:26:12 +0000, ][ wrote:

> I remember that I revived some dark photos to normal look by simply
> choosing certain gimp menus. Now I want to do it again, but couldn't find
> the menu entry any more.

thanks everyone for the respond.

The retinex
http://docs.gimp.org/en/plug-in-retinex.html
looks very promising, but I found that it is not that automatic --
The default does not give optimal result, and I didn't seem to be
able to find a good parameter combination.

Sjoerd Hiemstra's suggestion,
http://article.gmane.org/gmane.linux.debian.user/270822
is the most comprehensive. I found it has covered all the cases
for my dark photos. thanks Sjoerd.

cheers

tong

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http://xpt.sf.net/techdocs/
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][ wrote:
> On Mon, 22 Jan 2007 00:26:12 +0000, ][ wrote:
>
>
>> I remember that I revived some dark photos to normal look by simply
>> choosing certain gimp menus. Now I want to do it again, but couldn't find
>> the menu entry any more.
>>
>
> thanks everyone for the respond.
>
> The retinex
> http://docs.gimp.org/en/plug-in-retinex.html
> looks very promising, but I found that it is not that automatic --
> The default does not give optimal result, and I didn't seem to be
> able to find a good parameter combination.
>
> Sjoerd Hiemstra's suggestion,
> http://article.gmane.org/gmane.linux.debian.user/270822
> is the most comprehensive. I found it has covered all the cases
> for my dark photos. thanks Sjoerd.
>
> cheers
>
> tong
>
>
open your photo with the gimp. select 'tools' >> 'color tools' >>
'Brightness-Contrast' and save it under another name.

hope this s,

regards,

steef


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On Tue, 23 Jan 2007 03:44:39 +0000, ][ wrote:

> Sjoerd Hiemstra's suggestion,
> http://article.gmane.org/gmane.linux.debian.user/270822
> is the most comprehensive. I found it has covered all the cases
> for my dark photos. thanks Sjoerd.

One of my case is in door shooting, with very big and bright window
background, so the front view is pretty dark.

I just found that, if you want to get much complicated than above, there
is a tutorial that shows how to blend two different exposures of the
same scene to get the best parts of both images.

http://www.gimp.org/tutorials/Blending_Exposures/

--
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http://xpt.sf.net/techdocs/
http://xpt.sf.net/tools/


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On Tue, 23 Jan 2007 16:16:49 +0000 (UTC)
"][" <mlist4suntong@yahoo.com> wrote:

> On Tue, 23 Jan 2007 03:44:39 +0000, ][ wrote:
>
> > Sjoerd Hiemstra's suggestion,
> > http://article.gmane.org/gmane.linux.debian.user/270822
> > is the most comprehensive. I found it has covered all the cases
> > for my dark photos. thanks Sjoerd.
>
> One of my case is in door shooting, with very big and bright window
> background, so the front view is pretty dark.
>

Not exactly gimp related, but might you with the photography part:

The classical solution in photography is to either overexpose (or expose
according to the room, although you will lose detail outside the window, or
better yet, shoot using a flash (fill flash). This would work as long as the
room isn't too large, especially good if you want to shoot a subject against
the window or the sunset. Can also give impressive results in other situations.
(most, if not all fashion shots are done at least with one flash if not
several, a lot of photographers shoot with flash most of the time not only in
back-lighting situations).

With digital photography you could try lower contrast during shooting and
average your exposure. It would take some work to balance the results
afterwords and depends on the difference in lighting tough. You also need to be
careful with the white balance.

Take note though that digital cameras have a tendency to whitewash (lost all
detail) in bright areas and introduce color noise in dark areas. Film is a bit
better with the noise, but negatives have problems with the dark areas (it is
recommended to overexpose by a third stop) and slides with bright areas
(underexpose by a third stop). Some camera light-meters take this already into
account though.

> I just found that, if you want to get much complicated than above, there
> is a tutorial that shows how to blend two different exposures of the
> same scene to get the best parts of both images.
>
> http://www.gimp.org/tutorials/Blending_Exposures/
>

It's a good technique if you don't have subjects and you have a tripod so that
you can take several shots without moving the camera.

I find this technique better suited for scanning slides since the dynamic range
of the film is usually higher than what the scanner can handle.


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On 2007-01-22 @ 00:26:12 (week 04) ][ wrote:

> Hi,
>
> I remember that I revived some dark photos to normal look by simply
> choosing certain gimp menus. Now I want to do it again, but couldn't find
> the menu entry any more.

I often use "Tools" -> "Color Tools" -> "Curves" in these situations. It
works quiet well to lighten up dark photo's. Experiment a bit with the
shape of the new curve to get a feel for what it can do for you.

Sincerely,

Grx HdV


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On Tue, Feb 06, 2007 at 07:30:37PM +0000, J.A. de Vries wrote:
> On 2007-01-22 @ 00:26:12 (week 04) ][ wrote:
>
> > Hi,
> >
> > I remember that I revived some dark photos to normal look by simply
> > choosing certain gimp menus. Now I want to do it again, but couldn't find
> > the menu entry any more.
>
> I often use "Tools" -> "Color Tools" -> "Curves" in these situations. It
> works quiet well to lighten up dark photo's. Experiment a bit with the
> shape of the new curve to get a feel for what it can do for you.

I find using a contrast mask can these a lot too. google gimp
tutorials. There is a good one on using contrast masks. It can bring
up the darks without necessarily washing out the lights.

A

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On 2007-01-22 @ 00:26:12 (week 04) ][ wrote:
> Hi,
>
> I remember that I revived some dark photos to normal look by simply
> choosing certain gimp menus. Now I want to do it again, but couldn't find
> the menu entry any more.
>
I've done some quick edits with gThumb, I personally find it to be a bit
more elegant than The Gimp for minor image editing. Obviously it can't
do the heavyweight stuff that The Gimp can do, but it sure can do the
lighter/easier things much quicker.


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