Hello,

newbie Gimp user here trying to learn how to do new things recently. I am making trying to make a custom image pipe actually and I am getting a problem with the semi transparent edges around my images.

Basically when using the image pipe as my brush the semi transparent pixels around the edge of the images are output randomly as anything from the true transparency to black. I fiddled with all setting and could not fix it. I noticed that just simply copying one of the images to clipboard and using that as the brush is creating the same artefacts. It's almost a random drop shadow effect, but I do not want this.

I attached an image showing the issue. I roughly copies in the image pipe images on the right hand side and the left is using it as a brush. I tried transparent and opaque background but the result was the same. You can see the problem most clearly on the 2s with the varying amount of blackness around the edges where there should be nothing but the blue color.

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Hi , New on the forum with a problem  (sorry for my english)

After switching from 2.8 to 2.10.14 i noticed a loss of quality of the line thickness when i use the color to alpha option.

I used to draw black lines (with paths) on white background and then use the color to alpha to remove white .And then i was able to colorize a picture on another layer placed below.

There was two layers , one with black lines on transparent background and a second one , below , with colors.
It was clean when i colorized the second layer. 
Now after color to alpha ,when i remove the white , although i colorize on another layer (normal) i see that the black lines , on the first top layer , tend to disappear and get very thin when i color and pass on them . It becomes very pixelized too .

Is there a way to counter this effect ?
Has someone faced the same issue ?


Ps
I don't know if there is a connection but i also noticed after switching from 2.8 to 2.10.14 that thickness is not the same .

As an exemple a 2 pixel size brush/path is now way thiner than it was before.

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I am making a Minecraft texture pack for bedrock edition, and the grass overlay system puts the overlay color on top of the RGB value of a given pixel, with the transparency of that pixels alpha channel. What this means is, to make a proper texture, you need to put the dirt part of the grass with an alpha of 0.
Unfortunately GIMP replaces the RGB values of a 0 alpha pixel with black.
Does anyone have a way to make a completely transparent pixel that still has a chosen RGB value?

Hi. Trying to change the color of the bucket fill function in python gimp, but due to my inexperience with python and the structure between gimp and python i have not been successful.
Information im looking for is:
  How to swap the pre-selected colors
  How to set new color
  How to fill and selected area
  How to select and area

All of which needs to take place in pyGimp

The bellow code is what i have so far, but the result is what i expect.
Expected result should be an grid (almost like a chess board) where pyGimp color individual squares in one of the two colors (foreground and background)

#Select and square
pdb.gimp_rect_select(img, gPosX+pX, gPosY+pY, wid, hig, CHANNEL_OP_REPLACE, False, 0.0)
#Fill the square
draw.fill(FILL_FOREGROUND)

Hi
I am running gimp 2.8 and I am importing PDF files. And on all PDF files that I have imported there is a loss of quality. However this dose not happen if I import a jpeg

Hi there,

I've been trying to figure out how to remove the outline of the adjusted "twitch logo" in my attachment picture.
If you look carefully, you will see a previous outline after i scaled the twitch logo down.

How do i remove that outline??
Thank you so much

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Any idea on how to make a color wheel in gimp?
Just a simple pie visual, except instead of for the purpose of percentages it's just to show the rainbow +3 other colors (white, brown, and black) so 9 colors in all

Hello!

Here are my first two plugins. With them you can draw parametric curves (or polar curves) in Gimp, approximately as Bézier curves. If you go to

http://kmarkku.arkku.net/

and click the link Simple Parametric Curves, and scroll down to the bottom, you find a button to download a .zip file. The items in the .zip file are:

- simple_parametric_curve.py (this is the plugins)
- doc.pdf (the documentation)
- example_files (this is a folder; see the site for explanation).

To install do:

1. Download the .zip file.
2. Unzip it.
3. Put the file simple_parametric_curve.py in your Gimp's plug-ins folder.
4. Restart Gimp.
5. Then the two plugins should appear in Gimp's menu at
     Filters / Render / Parametric curves.
Their names are 'Simple parametric curve' and 'Simple polar curve'.

You had better then start by glancing through what the site tells. Then glance at the file doc.pdf.  If the plugins interest you, you had better read doc.pdf more thoroughly at some point.

The task is to draw a parametric curve. That is what the first plugin, Simple parametric curve, does. The second, Simple polar curve, draws a curve given in polar form. (I assume here that you have some idea what those mean, so I don't explain). By "drawing" I mean that the plugin constructs the curve as a Bézier curve. In Gimp that means a path or a vectors object. So, if you want to stroke the curve, you have to do it yourself.

Since only very few curves can be faithfully represented as a Bézier curve, the produced path is just an approximation of the requested parametric curve.

Inkscape has a tool for such job. But it is even more simple than my plugins. To get an accurate result with it, one often has to make it to put control points densely on the curve. My plugin works in the opposite way: It tries to use only a sparse set of control points. That makes the problem of approximation quite non-trivial. The algorithms are my own.

You may wonder why I call my plugins simple. The reason is that I shall soon be sharing with you a third plugin which is developed much further, works much better, but is more difficult to use. (Though, if you feed the inputs in the GUI and not in an input file, there is not much difference. What these words mean, please see the explanations on the site or in doc.pdf.) I believe that in practice the simple plugins will be the ones most used.

I was hoping to include a picture but it seems that it cannot be uploaded here, only a link to somewhere else. So, please download the .zip file and look at the file doc.pdf there. It has some pictures.

Now I'd like to say a little of my background. I am a mathematician, already retired, who knows very little about computers or coding. Making such plugins came to me as a hobby some years ago. I was hooked and still am. I have been learning Python along the way. I used a much older version of my plugin when I wrote some lecture notes in mathematics as my last task before retirement in 2016. All curves I draw using my own plugin. So the plugin has been applied in a useful job even before publication.

If you have questions or problems with the plugins, please just ask.

Hi,

This isn't really a Gimp question, but I'm having trouble finding a better place to post it - please feel free to redirect me if appropriate.  I've been feeding xml files to the Gegl command line application to process photos - applying a crop, doing rotations, compositing, adding text, etc.  But now I've been asked to add dropshadows and strokes to the text.  Dropshadows were easy... but it looks like to apply a stroke, I'd need to somehow define a path around the text.  I've been all over the (somewhat sparse) documentation, but I can't find anything that even gives me a starting point on how to do that.  Does anyone here have any suggestions for doing this in an automated fashion?

Thanks,
Jason

These are made by duplicating the same text layer

   

First one is Fliters > Noise > CIE Ich Noise and the second one is made using a custom pattern I built from a noise image. My initial goal way to make the second for which I had to use the pattern.

I was hoping to learn how to make the density of noise less in the output. Currently, it is either too much noise or medium noise. No way to do as in the one created by the pattern ( less noise ).

Any help will be great. Thanks.