[Gimp-developer] Perspective tool - preserve aspect ratio?

2011-09-24 Thread Richard Gitschlag




I was using the Perspective tool (GIMP 2.6) on some photos to correct for some 
minor rotation/skew issues, and realized how easy it is to throw the image's 
aspect ratio out of proportion -- in my case, TOO easy.  My photos were of some 
quilt squares, and I was using the edges of these squares as guides for 
aligning a Corrective transform to correct for some minor (but visible) 
skewing.  Naturally, this means I'm aligning my Corrective guide to an area in 
different proportion to the source image, so it throws the aspect ratio out of 
whack, and I must have the squares in the photo remain square after 
transformation

Is it possible for the tool to compensate for X/Y aspect ratio distortion 
somehow?  Or is that too much to ask?

On a semi-related note, how does the Perspective transform matrix work?  I get 
that the first two rows represent an affine transformation, with (1,3) and 
(2,3) corresponding to X and Y translation, (1,1) and (2,2) corresponding to X 
and Y scaling.  What's the third row represent?

- strata_ran...@hotmail.com

Numbers may not lie, but neither do they tell the whole truth.
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Re: [Gimp-developer] More Brush dynamics?

2011-09-15 Thread Richard Gitschlag

 Date: Thu, 15 Sep 2011 09:37:05 -0400
 From: brianvanderbu...@aim.com
 To: gimp-developer@lists.XCF.Berkeley.EDU
 Subject: Re: [Gimp-developer] More Brush dynamics?

 

 I've played with 2.7.3 on Windows a little bit.  Here are some other

 ideas for new dynamic outputs:  Hue, Saturation, and Value/Luminance

 

 Brian Allen Vanderburg II

Those can already be simulated using the Color dynamic and careful RGB values, 
although
as mentioned in bug #572300 the current Color dynamic (i.e. low pressure = 
FG, high pressure = BG)
is a bit counter-intuitive in 2.6.



-- Stratadrake
strata_ran...@hotmail.com

Numbers may not lie, but neither do they tell the whole truth.


 

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Re: [Gimp-developer] More Brush dynamics?

2011-09-14 Thread Richard Gitschlag

 Date: Wed, 14 Sep 2011 02:42:14 +0400
 From: alexandre.prokoud...@gmail.com
 To: gimp-developer@lists.xcf.berkeley.edu
 Subject: Re: [Gimp-developer] More Brush dynamics?

 Dunno about Increment, but Fade is already in the brush dynamics
 matrix for 2.8. The matrix is currently 7x10, and I strongly suggest
 the team to consider building and selling a customized version of
 monome to control it :)

Actually I'm probably mistaken on the incremental option -- been a long time 
since I tried to use it.

So what are all the dynamics on the plate for 2.8 anyway (compared to 2.6) ?

-- Stratadrake
strata_ran...@hotmail.com

Numbers may not lie, but neither do they tell the whole truth.

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Re: [Gimp-developer] More Brush dynamics?

2011-09-14 Thread Richard Gitschlag

 Date: Wed, 14 Sep 2011 19:32:47 +0300

 Subject: Re: [Gimp-developer] More Brush dynamics?

  So what are all the dynamics on the plate for 2.8 anyway (compared to 2.6) ?

 Why not grab some 2.7.3 build and try it out? :) There is lots to discover:)
 -- 
 --Alexia

*shrugs*  preference for stable versions maybe?  The only non-stable FOSS I 
run is FontForge and that is by necessity, not choice.

-- Stratadrake
strata_ran...@hotmail.com

Numbers may not lie, but neither do they tell the whole truth.

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[Gimp-developer] More Brush dynamics?

2011-09-13 Thread Richard Gitschlag

I recently discovered I've misplaced my Wacom pen stylus -- the tablet 
equivalent of losing your car keys.  Ouch.

Anyway, it gave me an idea for GIMP: Can the Incremental and Fade Out brush 
options be incorporated into the Brush Dynamics grid?  The options basically 
link opacity to stroke length, but it would be nice if we could link stroke 
length with other factors like brush hardness or color.  (For example, linking 
color to stroke length would mimic the effect of a simple gradient.)

-- Stratadrake
strata_ran...@hotmail.com

Numbers may not lie, but neither do they tell the whole truth.
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