I got the idea to try to implement warping of paths, similar to Gimp's tool Warp Transform on images. I show now what I managed to make. Not quite similar but close.

See the picture below. The grid is actually the path that I warp. I use this path in this example since it shows the effects best. The warping is done inside a given circle, so that it is a local operation. The plugin has three modes of action: Grow, Shrink, and Swirl (counter-clockwise or clockwise). The picture shows an example of each, applied to the grid path:

   

The blue circles do not belong to the transformed path; they are here just to show the circles of action. The circle is input by the user as a 2-anchors path (meaning either a diameter or the center and one point on the circle).

The plugin has two parameters: Smoothing and Strength. Smoothing controls what happens at the edge of the circle. If Smoothing = 0, there will be sharp bends like in the picture above. When Smoothing > 0, the bends are rounded. The rounding happens inside the circle. The other parameter, Strength, controls the amount of the warping effect.

In the above picture Smoothing=0 and and Strength=1 (the defaults).

Here are the same examples as above but with Smoothing = 5 and Strength = 0.8 (recall that the blue circles do not belong to the path):

   

Good values for Smoothing are 0..10 but you can go higher. Strength accepts values 0..1.

Strength seems to work similarly to the Strength parameter in Gimp's Warp Transform tool. But Smoothing is nothing like the Hardness parameter in Warp Transfrom. And the figure on the left in the first picture (Grow) is something that the Warp Transform cannot produce. The effects of Grow in my plugin and in Warp Transform are very different even though with some parameter values they come rather close. But of course I have no idea what the formulas behind the Warp Transform are.

It appeared that while the warpings on the grid are quite pretty (to my eye at least), trying something more practical needs some care to get acceptable results. Here I tried a text. Left to right: Grow, Shrink, Swirl(cw), all with some smoothing (and now without the blue circles):

   

Another one. These three houses were made from the same straight-edged figure with Copy, Scale, and Warp:


   

The plugin has one serious drawback: It is based on my own rickety approximation algorithm that I have used before. I really wish I had something better. If you want fast work, you get either a lousy result or a vast number of control points. If you want good work with few control points, you have to wait with patience. This cannot be helped for the time being.

To get the plugin, go to

http://kmarkku.arkku.net/Path_warp_files...aster.html

scroll to the bottom, and click the download button. You get a zip file. Unzip it and place the one file it contains (warp_path.py) in your user's plug-ins folder. Then (re)start Gimp.

To invoke the plugins, go to the Paths tab, right-click some path and follow the links
Tools > Warping > ...

If you find strange behaviour by the plugin, please tell me.

Hello, I'm trying to automate the addition of a contrast filter in GIMP, but I'm stuck.

Today I learned to make a GIMP plugin following a Youtube tutorial, and I started to modify it to do my task. The problem is that the only gimpfu function with "contrast" anywhere is pdb.gimp_drawable_brightness_contrast(drawable, brightness, contrast), which does not produce the same effect, but rather something like a photo filter.

I searched the python procedure examiner (i don't know if I translated that properly), and there's not a single function with "filter" in its name. The deepest function-like name I found was the one in the title, through testing in the shortcut configuration panel.

Can anybody help me? Thank you

Popup cards, every time a surprise when open one. To make such a card, OAcard can help you :https://caa1211.github.io/webOAcard/. One can save a design to work further another time (.oa file) or one can save the design as png file. One can load the png file in gimp to create a piece of art.
[attachment=5786]
The gimp .OA file
[attachment=5787]

Just wondering if I am overlooking something. 

 In the following sketch: 

#1  is the pattern I am using, 

#2  is an example of how I would  like the final appearance of my stroked path, to appear

#3  is an example  stroked path, depicting the misalignment that I am hoping to correct

#4  is where I believe my problem is, the pattern actually arranges itself in a symmetric grid,  and the stroked path is merely a              mask over it, or, perhaps another way to say it is that the path is not "content aware"?

Is there something I am missing that will force the painting of the pattern to follow within the confines of the path?

Need for a electric circuit diagram for education and don't want to draw all the components of your own? This can help you : https://www.circuit-diagram.org/editor/ .One can save the drawing as svg file and load it in inkscape. When you want to use it in gimp then save it in inkscape as simple svg, make a create a new image, import the svg file as path (need for bigger result : scale the paths) and stroke the paths. 
   
A simple gif file :

  lamp battery corr.zip (Size: 4.62 KB / Downloads: 485)

Hello,
I've been using gimp a while (but still a learner) and have happily exported xcf images to pdf, which I have then viewed in preview on my Mac or Acrobat Reader. The type face I used is 'Architect's Daughter', imported into Gimp. However, today (when I was trying to rotate a pdf in Reader), the typeface on the pdfs changed to a sans serif default typeface in Acrobat Reader and preview.
My husband can send me pdfs (exported xcf files  (2.10) and I can read them fine in preview or Reader ie the correct type face. 
I'm assuming that something has changed in my gimp export settings to affect the conversion to pdf. The 'Architect's Daughter' still works in gimp but it just won't convert.
Any help much appreciated.

Completely new to gimp here, so I've been trying to do this for about an hour and it was a complete failure. I understand this is a complex software so the solution might be simple but not intuitive for begginers. I want to remove the sides of the image so the edges of the image are as close as possible to the phone .



I want to remove the red highlighted zones and then export the new image with alpha layer in the back. I know there should be like a million tutorials about this, but I couldn't find any adressing this issue directly. Any help?

 I attached the original image that i want to edit just in case.

Attached Files

Thumbnail(s)
   

So for some reason gimp became like this, I've searched everywhere and tried everything but I just seem to miss how to fix this. Anyone know what's happening?

This just started happening today.  

When I click on any layer in the image, it immediately switches the selection back to another layer.  It's always the 'same' layer.  
But when I click on a layer in the Layer Tab, it retains that layer as the one it switches to, if I click on a layer in the images.  Hope that's not confusing.  

I have rebooted and checked my controllers to make sure nothing is interfering with things.  I have rebooted.  And I have created a new image and added some text layers. And that image and layers has the same problem. 

I tried googling for a fix, but found nothing specific to this issue.  
Any help is greatly appreciated!!  

Hello

I am occasionnaly worker with GIMP and I am generally use it for photography.
I will need to generate a very large image full of pixel and I discover a tuto for PS:

Something like that with some actions I don't know in GIMP

1. Bring all images into Photoshop as a stack of layers
   
2. Resize the image to 200% width and 200% height using 'Nearest Neighbor'
   
3. Auto align all the layers
   
4. Average the layers by setting each layer's opacity to 1/layer number (the 1st layer will be 1/1 so 100% opacity, the 2nd layer will be 1/2 so 50% opacity, and the 4th layer will be 1/4 or 25% opacity, and so on).
   
5. Sharpen the image using a Radius setting of 2, and a suitable Amount setting (we used 200% for the 4 image stack and 300% for the 20 image stack – the more images you stack the more amenable the composite will be to aggressive sharpening)