[Gimp-user] Re: smooth outline to scripture

2003-02-24 Thread Ulf Rompe
Hago Ziegler [EMAIL PROTECTED] writes:

 The scripture was made with a pencil - therefore it is not compact
 and quite rough.

 You can see a part of it as an example on
 http://www.hagoschaos.de/gi27/line.html

One way to do it:

1. Run a Gaussian Blur on the picture. 5px should be good, but try
   other values here.

2. Select by color, fuzziness around 120. Select a black pixel. Try
   other values.

3. Create a new layer, fill the selection with black and switch of the
   background layer.

Problem: The more blurring you apply, the smoother thin lines will
look, but at some point the holes within the characters will shrink
too much.

[x] ulf

-- 

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Re: [Gimp-user] Re: smooth outline to scripture

2003-02-24 Thread Hago Ziegler
Hi Oliver and Ulf,

these more conventional methods, using different ways of blurring, I
had tried already. The best I could achieve was:
http://www.hagoschaos.de/gi27/line.html - image 3, and the initial B
then becomes like image 4.
Not very satisfying :-)

The plugin I still have to try.
Thanks to both.
Regards   Hago

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[Gimp-user] Re: smooth outline to scripture

2003-02-24 Thread Olivier Ripoll
Hago Ziegler wrote:

 Hi Oliver and Ulf,

 these more conventional methods, using different ways of blurring, I
 had tried already. The best I could achieve was:
 http://www.hagoschaos.de/gi27/line.html - image 3, and the initial B
 then becomes like image 4.

Perfect! It is gray, not black! Just use Image-color-levels and change
all the grays to white...

 Not very satisfying :-)

 The plugin I still have to try.
 Thanks to both.

 Regards   Hago

Have you tried frontline and autotrace?
http://autotrace.sourceforge.net/
you'll have to play with the parameters, but it should work. Of course,
the final image will be vectorial, not raster.

Regards,

Olivier.


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Re: [Gimp-user] Re: smooth outline to scripture

2003-02-24 Thread David Millet
Hago,

About the best technique I've found for doing something like that is:

1. use the select contiguous regions tool to select all the black
2. click the quickmask button in the lower left hand corner
3. use filtersblurblur to blur the whole thing (aka smooth it, you'll have 
to blur it alot to get it smooth)
4. use imagecolorslayers to sharpen up your selection
5. click the turn off quickmask button in the lower left hand corner, giving 
you a smooth selection
6. fill the selection with black

cheers!
david millet
http://david.azdeveloper.com
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[Gimp-user] Re: smooth outline to scripture

2003-02-24 Thread Olivier Ripoll
David Millet wrote:

 Hago,

 About the best technique I've found for doing something like that is:

 1. use the select contiguous regions tool to select all the black
 2. click the quickmask button in the lower left hand corner
 3. use filtersblurblur to blur the whole thing (aka smooth it, you'll have
 to blur it alot to get it smooth)
 4. use imagecolorslayers to sharpen up your selection

I think you mean levels not layers


 5. click the turn off quickmask button in the lower left hand corner, giving
 you a smooth selection

Working with the quickmask is basically the same as working on a channel, whcih
I mentionned in the original post.

 6. fill the selection with black

 cheers!
 david millet

Regards,

Olivier.


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Re: [Gimp-user] Re: smooth outline to scripture

2003-02-24 Thread Hago Ziegler
Hi,

things are getting better. See:
http://www.hagoschaos.de/gi27/line.html image no.5
I got it with the GUG-tutorial. The only thing I don't like at this
technique is, that original angels get rounded.
What I don't really understand, is what the quickmask is doing.
When I follow exactly the steps that David Millet describes, I get no
result. Am I missing still something, for example to activate the layer
again at some point?
Regards   Hago

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[Gimp-user] Re: smooth outline to scripture

2003-02-24 Thread Olivier Ripoll
Hago Ziegler wrote:

 Hi,

 things are getting better. See:
 http://www.hagoschaos.de/gi27/line.html image no.5

 I got it with the GUG-tutorial. The only thing I don't like at this
 technique is, that original angels get rounded.

 What I don't really understand, is what the quickmask is doing.
 When I follow exactly the steps that David Millet describes, I get no
 result. Am I missing still something, for example to activate the layer
 again at some point?

 Regards   Hago

The quickmask is just a tool allowing to work on selections. A selection in
gimp is a gray level image. It can be saved as such as a channel (look in
the select menu).
The interesting parts of this property are:
1- a selection is not just binary. Pixels can be 10% selected, 50%
selected, etc. This is controlled by the feather/sharpen in the Select
menu, and by the feathering options in some tools (Select by color comes
to my mind).
2- it is possible to apply any filter to a selection! This is great, but
not very known, mainly because it is not easily accessible in the
interface.

Unfortunately, there are no esay visual way to work with this property of
the selection. The marching ants only show a binary limit of the selection.
With gimp 1.2 (well 1.1.x to be correct), the developpers introduced a nice
visual way to handle this: the quickmask. The selection is represented as a
coloured semitransparent layer that can be painted on top of the image. It
is presented here:
http://www.xach.com/gimp/tutorials/quickmask/

Thus, one can say that the select-grow and select-shrink functions are
actually more or less equivalent to applying a blur+levels or a
dilate/erode to the channel/quickmask corresponding to the selection.

Sincerely,

Olivier.


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