[Digikam-users] Color Effects

[Gilles Caulier]

2009/6/30 Andi Clemens <andi.clemens at gmx.net>:
> Gilles,
>
> KDE3 version has the same problem, it never worked.
> For me it is "logical" that a smaller image size must have a different look
> when the same parameters are applied as to the full version.
> Makes sense to me.
>
> See this video:
> http://digikam3rdparty.free.fr/misc.tarballs/temp/colorfx.ogv


yes, never tested this one. but, distorsion work fine with KDE3.

The some color tools (not all) use neighbouring pixels. As preview and
target image size are differents, result are not the same.

The only way to fix it is to use real image data and rewrite editor
tool preview widget with zomming capabilities.

Gilles

>
> If the issue is really the difference between preview and final image size,
> then a lot of filters don't work correctly, not only ColorFX and DistortionFX,
> but also sharpen, blur etc...
>
> Andi
>
> On Monday 29 June 2009 17:27:42 Gilles Caulier wrote:
>> 2009/6/29 Andi Clemens <andi.clemens at gmx.net>:
>> > I can confirm this, and also DistortionFX looks totally different in the
>> > final image.
>> > This might be because we use the preview image for the calculation during
>> > user input, and apply those settings to the final, much bigger image
>> > later. This might cause different looks.
>> > I assume this is true for most filters then that use a preview image
>> > (instead of the full size).
>> >
>> > Gilles,
>> > could this be the cause?
>>
>> No. I have already found this issue, when code have been ported to Qt4.
>>
>> If i remember, KDE3 code don't have this problem.
>>
>> Gilles
>>
>> > David,
>> > can you please open a bugreport on this? If no one already exists of
>> > course.
>> >
>> > Andi
>> >
>> > On Saturday 27 June 2009 22:23:22 davidvincentjones wrote:
>> >> I have been playing with 'color effects'  recently but find that the
>> >> effect shown in the preview is vastly different from the effect set on
>> >> the image. The 'find edges' I find useful for special purposes but the
>> >> color shift that occurs once I click OK is very large and dificult to
>> >> predict. Ver 0.11.0 on Ubuntu 8.10
>> >
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