On mercredi 29 mars 2017 11:04:18 CEST Lorenzo Bolzani wrote:
> I did another test: sharpening in darkroom or sharpening using a style in
> the "export selected" panel gives identical results.
> Instead, exporting a downscaled image, reopening this smaller image and
> then applying sharpening gives different, better, results.
> 
> So my advice was wrong or not ideal at least. It was based on this part
> <http://www.darktable.org/usermanual/ch02s03s12.html.php#d0e3405> of the
> manual that I find quite confusing/ambiguous:
> 
> About export styles: "*You can use this feature to add processing steps and
> parameters that you want to be applied specifically to images before
> export, e.g. you may define a style that adds a stronger level of
> sharpening when you produce scaled-down JPEG files for the internet or add
> a certain level of exposure compensation to all of your output images.*"
> 
> But sharpening gets softened a lot during downscale so it doesn't seem a
> good example, more like a workaround.
> 
> So it seems like some separate post processing is needed.

Indeed, an option to apply a style after resampling would be nice. Even better 
if such a style 
could include the export parameters (esp. size).

As for sharpening related to downsizing: using a larger radius to offset the 
downscaling *might* 
work.

Remco.


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