[Bug 497620] Re: Linear Histogram is always empty

2012-06-27 Thread Bug Watch Updater
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On 2008-06-05T18:28:18+00:00 dhjt wrote:

Version:   0.9.4-beta4 (using KDE 3.5.8)
OS:Linux

I get the impression that the histogram preview is calculated from a
downscaled version of the image. The result is that the histogram
preview is not very accurate.

When working with large images, this causes problems. The original image
may contain many small highlights that completely disappear when the
image is scaled down. So, in the Adjust Curves preview window, these
highlights go unnoticed. When adjusting the curve, you can easily clip
the high lights without noticing it. Only after applying the final
Adjust Curves settings, the full histogram is re-calculated. Often, it
turns out that the histogram has been clipped, while the preview looked
just fine.

IMHO an accurate preview of the resulting histogram is critical to a
Adjust Curves tool. Maybe the plugin should have an option to create a
preview based on the full image in stead of a scaled down version. I can
imagine adding a 'fast preview' checkbox that is checked by default.

The Adjust Levels tool will probably have the same problem, but I did
not check.

Reply at: https://bugs.launchpad.net/digikam/+bug/497620/comments/0


On 2009-12-28T20:15:34+00:00 Kde-20-micorreo wrote:

In my case, I don't know if the problem is related to my installation,
linear histogram rarely display anything, I've to work all the time
using logarithm histogram

Later
Manuel

Reply at: https://bugs.launchpad.net/digikam/+bug/497620/comments/3


On 2009-12-28T20:51:12+00:00 Caulier-gilles-9 wrote:

This problem have been fixed with 1.0.0. Check this version.

Gilles Caulier

Reply at: https://bugs.launchpad.net/digikam/+bug/497620/comments/4


On 2010-02-08T21:57:08+00:00 Caulier-gilles-9 wrote:

Dik,

With 1.2.0, I plan to change all Colors Correction tools in editor to :

- Use zommable preview widget.
- Use mutithreading everywhere with this tools (not yet done since a long time)
- Compute histogram on visible preview. If you zoom to fit image on scrren, you 
will compute histogram on whole image.

I started with BCG tool. Code is in svn now. I would to know your
feedback here before to continue. Relevant tools to do are :

- HSL
- Color Balance
- Chanels mixer
- BW
- Auto corrections
- Levels
- Curves
- White Balance

Gilles Caulier

Reply at: https://bugs.launchpad.net/digikam/+bug/497620/comments/8


On 2010-02-08T21:59:04+00:00 Caulier-gilles-9 wrote:

SVN commit 1087337 by cgilles:

port BCG tool to use zoomable preview, multithreading, and histogram 
computation based on visible preview region.
CCBUGS: 163286


 M  +16 -29bcgtool.cpp  


WebSVN link: http://websvn.kde.org/?view=revrevision=1087337

Reply at: https://bugs.launchpad.net/digikam/+bug/497620/comments/9


On 2010-02-09T21:45:36+00:00 dhjt wrote:

Gilles,

This sounds really good. Does this mean that it is possible to preview
the histogram of a small detail as well? That would enable us to check
if small details become overexposed for example.

I might get to try a SVN checkout this weekend.

Reply at: https://bugs.launchpad.net/digikam/+bug/497620/comments/10


On 2010-02-09T23:10:28+00:00 Caulier-gilles-9 wrote:

Does this mean that it is possible to preview the histogram of a small
detail as well?

Yes absolutly. The histogram is computed with visible preview area, set
by preview mode buttons from right side of status bar. If you zoom
indeep the image, you will compute histogram from this part.

Gilles Caulier

Reply at: https://bugs.launchpad.net/digikam/+bug/497620/comments/11


On 2010-02-10T19:38:20+00:00 tschenser wrote:

I can not check this as histogram in BCG is not working for me at the
moment. But does this mean that histogram is _always_ computated on
visible preview area? I mean this is a feature, but we do also not
update image dimension display on visible preview area. Even in zoom it
should be possible to have a full image histogram and for my
understandings this should be standard. Or do I understand something
wrong?

Jens

Reply at: 

[Bug 497620] Re: Linear Histogram is always empty

2011-02-27 Thread Bug Watch Updater
** Changed in: digikam
   Importance: Unknown = Wishlist

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  Linear Histogram is always empty

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[Bug 497620] Re: Linear Histogram is always empty

2010-03-03 Thread Bug Watch Updater
** Changed in: digikam
   Status: Confirmed = Fix Released

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[Bug 497620] Re: Linear Histogram is always empty

2010-01-27 Thread Bug Watch Updater
** Changed in: digikam
   Status: Unknown = Confirmed

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[Bug 497620] Re: Linear Histogram is always empty

2010-01-04 Thread Luka Renko
Thanks for testing and confirming it is fixed.

** Changed in: digikam (Ubuntu)
   Status: Incomplete = Fix Released

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[Bug 497620] Re: Linear Histogram is always empty

2010-01-03 Thread Luka Renko
I cannot reproduce this problem with 1.0/final.

Digikam 1.0/final is now available for Karmic users in karmic-backports
repository. Can you enable backports repository and confirm that you
still have this problem?


** Changed in: digikam (Ubuntu)
   Status: New = Incomplete

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Re: [Bug 497620] Re: Linear Histogram is always empty

2010-01-03 Thread manuel
2010/1/3 Luka Renko - :
 I cannot reproduce this problem with 1.0/final.

 Digikam 1.0/final is now available for Karmic users in karmic-backports
 repository. Can you enable backports repository and confirm that you
 still have this problem?


 ** Changed in: digikam (Ubuntu)
       Status: New = Incomplete

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Fixed in 1.0 karmic-backports

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[Bug 497620] Re: Linear Histogram is always empty

2009-12-28 Thread manuel
** Bug watch added: KDE Bug Tracking System #163286
   http://bugs.kde.org/show_bug.cgi?id=163286

** Also affects: digikam via
   http://bugs.kde.org/show_bug.cgi?id=163286
   Importance: Unknown
   Status: Unknown

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[Bug 497620] Re: Linear Histogram is always empty

2009-12-18 Thread manuel
** Summary changed:

- Linear Histogram are always empty 
+ Linear Histogram is always empty

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[Bug 497620] Re: Linear Histogram are always empty

2009-12-16 Thread manuel

** Attachment added: Dependencies.txt
   http://launchpadlibrarian.net/36892004/Dependencies.txt

** Attachment added: XsessionErrors.txt
   http://launchpadlibrarian.net/36892005/XsessionErrors.txt

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