[Digikam-users] Problem with neon effects

[Gilles Caulier]

This is exactly what happen. Neon preview is computed to reduced image.

Gilles Caulier

2014-10-21 12:28 GMT+02:00 Daniel Bauer <linux at daniel-bauer.com>:
> Am 21.10.2014 um 02:09 schrieb Dan McDaniel:
>>
>>
>> I'm finding a problem when using the neon effect. When I'm in the Color
>> Effects tool and select neon I see one thing, but when I click on OK and
>> return to the main Image Editor screen the image changes. The colors are
>> decidedly different. Not sure what I'm doing wrong.
>>
>> Is it OK to attach a couple of sample images to a post? I've reduced
>> them to about 500KB each.
>>
>
> I think the preview is calculated on the base of a reduced photo (the
> preview), but in the end of course it's applied to the original image.
>
> The smaller preview has different information (many smaller parts falling
> out...) and so the effect on the high res can differ very much, especially
> with effects that depend on "pixel neighbors"...
>
> To my opinion this cannot be avoided unless the app would calculate already
> the previews on the high res file, what would consume too much time.
>
> So the preview in these cases can only give you some idea of the "kind of
> effect" the filter produces in general and in what kind the settings will
> affect, but in the end you simply have to try: say ok, discard the result,
> try with different settings... etc.
>
> If my explanation is not correct, please rectify. dear digikamers :-)
>
> Daniel
> --
> Daniel Bauer photographer Basel Barcelona
> http://www.daniel-bauer.com
> room in Barcelona: https://www.airbnb.es/rooms/2416137
>
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