Please, tell me approximate settings for 64bit system, 8Gb memory
2014-04-24 22:01 GMT+04:00 Ulrich Pegelow <[email protected]>:
> Hi Liudmilla,
>
> think it should read "Tiling failed for module ...".
>
> Tiling is a process where darktable splits the image in rectangular tile
> and process them one after the other and recombining the full image in
> the end. This is done in order to save memory and is especially needed
> if you are short in RAM or if your are on a 32-bit system.
>
> The problem now is that - depending on the module and its settings -
> darktable needs to process part of the tile as an "overlap" area to
> avoid borderline artifacts. That overlap area is not used when
> recombining the tiles. For the shadows and highlights module this needed
> overlap area depends on the blur radius and can get very large.
>
> Suppose that your memory situation requires the image to be processed in
> tiles of 400 x 400 pixels. If the overlap area needs to be 200 pixels
> (on each of the four sides of the tile) it's clear what happens: there
> is nothing left "in" the tile which can be used.
>
> What darktable does in that case is to forget about tiling and just
> tries to push through the image in one chunk. That might give all
> possible results: it sometimes works, sometimes part of the image is
> garbled, sometimes darktable crashes. The warning tells you to have a
> close look at your output if you got what you want.
>
> What can you do? You can of course reduce the blur radius in shadows and
> highlights, but that influences the look of the image.
>
> You can increase the configuration parameter "host memory limit for
> tiling" but that might not work if your system is limited in memory (see
> above).
>
> In general it's strongly advised to run darktable on a 64-bit system
> with enough RAM (like 4GB or more).
>
> Ulrich
>
>
> Am 24.04.2014 19:47, schrieb Людмила Бандурина:
> > I see message «Tiling filed for module 'shadhi'. Output may be garbled.»
> > when export file from dark room. What is this?
> >
> > --
> > Best wishes, Liudmila
> >
> >
>
>
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