Really interesting, well done Maurizio ! :)

On Thu, Mar 23, 2017 at 10:55 AM, Maurizio Paglia <mpagl...@gmail.com>
wrote:

> Hi, Heiko.
> I saw this feature in LR brushes. It is very interesting.
> dt masks are indeed more powerful and flexible than LR brushes and with
> this new feature they will be more and more a real swiss army knife!
> Hope to see this feature approved and merged in dt git soon.
>
> Thank you for your great work!
> Maurizio
>
>
>
> 2017-03-23 9:55 GMT+01:00 johannes hanika <hana...@gmail.com>:
>
>> wow, this looks interesting and useful!
>>
>> cheers,
>>   jo
>>
>> On Wed, Mar 22, 2017 at 11:55 PM, Heiko Bauke <heiko.ba...@mail.de>
>> wrote:
>> > Hi,
>> >
>> > in Darktable masks can be blurred by a Gaussian filter.  I have
>> implemented
>> > an experimental feature to modify parametric and drawn masks by another
>> kind
>> > of filter called guided filter.  Such a guided filter blurs the mask but
>> > also takes into account the structure of the image. It is guided by the
>> > image.  When a drawn or parametric mask is filtered by the guided
>> filter it
>> > tends to have edges where also the image has edges.  The guided filter
>> is
>> > similar to a bilateral filter but is less prone to cause halo effects at
>> > edges.  The effect of the guided filter is also illustrated in the
>> attached
>> > figures.  The theory behind this filter is described in
>> > http://kaiminghe.com/publications/eccv10guidedfilter.pdf
>> > http://kaiminghe.com/eccv10/index.html
>> >
>> > If you want to play with this new feature checkout the guided_filter
>> branch
>> > in my darktable repository on github.  Feedback will be welcome.
>> > https://github.com/rabauke/darktable
>> >
>> > Warning: Make sure that the modified version of darktable does not
>> overwrite
>> > your working data base, e.g. use the --configdir option. Otherwise you
>> may
>> > experience problems when going back to Darktable 2.2.3.
>> >
>> >
>> >         Heiko
>> >
>> >
>> > --
>> > -- Number Crunch Blog @ https://www.numbercrunch.de
>> > --  Cluster Computing @ http://www.clustercomputing.de
>> > --       Professional @ https://www.mpi-hd.mpg.de/personalhomes/bauke
>> > --  Social Networking @ https://www.researchgate.net/p
>> rofile/Heiko_Bauke
>> >
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>
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