Re: [Gimp-user] How to Blur

2017-08-03 Thread Steve Kinney 


On 08/03/2017 12:04 PM, Helmut Jarausch wrote:
> Hi,
> probably this is FAQ but I couldn't find an answer.
> 
> I have a light skirt of a person in foreground in front of a rather dark
> background.
> I have created a selection for the background (using GMIC select
> foreground).
> This selection is not feathered and clearly separates the foreground
> from the background.
> 
> Now I want to blur the background. Unfortunately I get some 'halo'
> around the foreground.
> 'Selective Gaussian Blur' performs better near the boundary of the
> selection but it blurs
> part of the background not enough.

If your foreground content is selected, isolating it from the background
with a layer mask is easy:  Duplicate the layer, right click the new
layer in the Layers dialog, and select "Add layer mask."  Then do Select
> Invert, click on the mask thumbmail in the Layers dock, and drag and
drop black onto the image canvas.  The new layer is now like a stencil:
The foreground is visible, the background transparent.  (You could just
delete everything but the foreground from the layer, but using a mask
enables you to adjust the result if/as necessary by painting on the mask
with white (to restore visibility) or black (to make transparent.)

To prevent a 'halo' effect around the foreground object when blurring
the background layer, you can remove the foreground content from it
before blurring.  Turn visibility of your new layer off, select the
layer below it in the Layers dock, and delete your selected foreground.
(If the "hole" is not transparent after deletion, undo that step, right
click the thumbnail in the Layers dock, do "Add alpha channel" and try
again.)  Once your foreground content is a transparent hole in the
background layer, do Filters > Enhance > Heal selection.  This will
invoke the resynthesizer plugin, and seamlessly replace the "hole" with
a generated pattern based on the surrounding image content. (If your
foreground is 'big' in terms of pixel count, this might take some time.)

Then turn your top layer's visibility back on, blur the layer under it,
and viola:  No halo.

:o)


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Re: [Gimp-user] Huion tablets compatibility check request

2017-08-03 Thread Ross Martinek 
Does this work on a Mac? I don’t recall GIMP recognizing the Huion tablet and 
stylus in that dialog, though they seem to work well except for this default.

Ross


> On Aug 3, 2017, at 10:53 AM, Richard  wrote:
> 
> About the only people who can truly help you are those running GIMP (similar 
> version) on Windows (preferably 10) with a same/similar brand tablet as yours 
> ... and there probably aren't many on this list who do.  That leaves the rest 
> of us just guessing at answers...
> 
> For starters, GIMP is indeed configured to have the stylus pen assigned to 
> Airbrush and the stylus eraser assigned to Eraser by default, both of which 
> are separate from the tool associated with the core mouse pointer 
> (Paintbrush, I think).  This IS configurable, however ... under Edit > 
> Preferences > Input Devices, you can allow GIMP to save the device->tool 
> mappings upon exit or you can manually save them so it will start with your 
> preferred tools per device.
> 
> -- Stratadrake
> strata_ran...@hotmail.com 
> 
> Numbers may not lie, but neither do they tell the whole truth.
> From: gimp-user-list  > on behalf of Ross Martinek 
> mailto:triariu...@gmail.com>>
> Sent: Saturday, July 29, 2017 12:28:29 PM
> To: torba
> Cc: gimp-user-list@gnome.org ; 
> notificati...@gimpusers.com 
> Subject: Re: [Gimp-user] Huion tablets compatibility check request
>  
> Glad I didn’t update beyond 2.8.18.
> 
> You didn’t mention what OS you use. This would be useful for diagnostics, and 
> so it could be determined whether this was a Windows, Mac, or Linux problem.
> 
> I’m on a Mac, OS 10.12.6, running Huion driver V11.1.8. Works fine with GIMP 
> 2.8.18. It would be a disaster if I upgraded and suddenly couldn’t use the 
> tablet.
> 
> In my configuration, GIMP always wants to see the pen set as airbrush at 
> startup. I usually have to select another tool three times before it takes. 
> Thereafter it’s fine.
> 
> Ross
> 
> 
> > On Jul 29, 2017, at 4:49 AM, torba  > > wrote:
> > 
> > Hello,
> > With recent versions of Gimp I'm experiencing problems with my Huion h610pro
> > tablet.
> > Clicking on canvas makes a single mark but dragging the stylus doesn't move 
> > the
> > cursor at all.
> > Tools that use single clicks work without problems.
> > The last version of Gimp that works fine is 2.8.18.
> > Is this something that the Gimp team could look into for future patches?
> > I really like the new additions in 2.8.22 and I'm bummed out that I have to 
> > miss
> > out on these.
> > 
> > My huion driver is a custom version of v11.
> > 
> > 
> > There's also another problem - often the tool changes when the stylus 
> > touches
> > the tablet. Sometimes it's enough to cycle through a few tools and the 
> > choice
> > sticks.
> > 
> > PS:
> > I already posted here:
> > http://www.gimpusers.com/mailmsg.php?88192%40forums.gimpusers.com 
> > 
> > so feel free to remove this post if necessary.
> > 
> > 
> > -- 
> > torba (via www.gimpusers.com/forums )
> > ___
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> > 
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> > 
> 
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> 
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[Gimp-user] How to Blur

2017-08-03 Thread Helmut Jarausch 

Hi,
probably this is FAQ but I couldn't find an answer.

I have a light skirt of a person in foreground in front of a rather  
dark background.
I have created a selection for the background (using GMIC select  
foreground).
This selection is not feathered and clearly separates the foreground  
from the background.


Now I want to blur the background. Unfortunately I get some 'halo'  
around the foreground.
'Selective Gaussian Blur' performs better near the boundary of the  
selection but it blurs

part of the background not enough.

Many thanks for a hint,
Helmut
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