I've used Gimp in a fairly halfhearted way (1) for some years but I'd now like to get to grips with it and I'd prefer a one source option, a book or course something that's joined up rather than fragmented tutorials.

I'll be using 2.8 on OpenSuse linux.


Please can you recommend something?



Many Thanks.              aamcle

(1) resize, clone, various simple adjustments , I'm fuzzy on paths and layers and channels etc.

My system: Gimp 2.8.18 on Debian GNU/Linux 9 (stretch) 64-bit Gnome 3.22.2

Hi,

I try to import a color palette from a picture with RGB mode, following the instructions of rich2005 found in https://www.gimp-forum.net/Thread-How-to...83#pid6383

Quote:To get a palette from the original RGB image is different.
1. In the palettes dialogue, right click to import https://i.imgur.com/iF437h3.jpg
2. You get the 'Import' dialogue where you can select the image, and the number of colours https://i.imgur.com/qLPGDYU.jpg
3. Then again, hunt for that palette (Lenna-imported-5), right click, rename to something sensible, note the 500 colours in this one. https://i.imgur.com/QBZPIJX.jpg

Say, for example, I have a layer that is solid red (255,0,0) on the left side and solid blue (0,0,255) on the right.  Then I cut out and keep a rectangle or polygon from the middle.  If I zoom in I see that the edge of the polygon fades to white.  The left fades from red to white, and the right from blue to white.

The original pixels, at what now is the edge, were full red (or blue).

Is there a way to cut that leaves the pixels at the edge at their original color (hue/sat/lum)?

This is what I did:
  pdb.gimp_image_select_polygon(image01, CHANNEL_OP_ADD, len(polygonPoints), polygonPoints)
  pdb.gimp_selection_invert(image01)
  pdb.gimp_edit_cut(layerobj)
  pdb.gimp_selection_invert(image01)

I think that what is happening is that for the cut the pixels at the edge might be considered as, for example, 80% inside the polygon and 20% outside - so they are given acolor that is 80% red.

I there way to select a threshold so that the pixels that are >= 50% red would be solid (255,0,0) red, otherwize they would be cut from the polygon?

Thanks,
Saurabh

I love the ink tool (the calligraphy pen): a slow movement is a thick like, and a fast movement is thin, just like using a quill pen. But for drawing I need the opposite: when quickly drawing a person's arm I need a thick line, but when I slow down to draw the fingers I need it thinner. Is there some way to do that?

(Using Gimp 2.8.16 on Linux Mint)

Gimp displays "Looking for data files / fonts (this may take a while)" on each startup

This is not the normal behavior. See https://bugzilla.gnome.org/show_bug.cgi?id=793918

Gimp should rebuild the font cache only when the fonts are added to/removed from the system.

A possible workaround:

• Navigate to C:\users\{your id}\AppData\local\fontconfig\cache
  
• There should be four files:
  • CACHEDIR.TAG
    
  • someverylongname (usually 1MB or more)
    
  • someverylongname.NEW (usually 1MB or more, slightly bigger that the one above if you added fonts)
    
  • someotherverylongname (small: 1K)
    
• rename someverylongname to someverylongname.OLD
  
• rename someverylongname.NEW to someverylongname
  
• restart Gimp which should no longer rebuild the font cache
  

I do not know the proper term for this, but I'm trying to do something in Gimp that I cannot figure out how to.

I have tried the normal overlay, but when you do that it uses the color under your new layer to find out what your color should be. This makes it so that if I had a red color and overlay it with blue, it turns purple.

What I want to do is to overlay a color that only overlays the nuance differences. So it would still be blue, but it would follow the nuance differences that the red had in the underlaying picture. How do I do this?

I have scanned an old recordcover with my DIN-A4 scanner.
The cover is bigger than the scanner so i had to scan it in two parts.

Now i try to make a composite of it, but the images are not exactly the same colour/value.
I tried eyeing it with the Curves or Levels Tool but i cant get it right.

Is it just a matter of value, or do i need to adjust all the RGB channels ?
My guess is, the differences come form the scanners light, so that seems to tell me its just the value that needs tweaking.


I also tried the method with sample points, but i can never get it right....

Any advice, or is there a way to automate this ?

EDIT:
added a link to the xcf

http://www.mediafire.com/file/v18vvsmy5p...can.xcf.gz

Hi,

I uploaded a small personal avatar image (PNG, 1 kb) from my computer, received the message "successful" and "This is your avatar". However, nothing to see

How can I upload an avatar, please?

Thanks,

gnuimpcub

Hi,

I am using Gimp 2.8.18 on Debian 9 64-bit Gnome 3.22.2.

I use Pencil (and Paintbrush) and Eraser fairly often, and I find it inconvenient to set each tool differently (e.g., the size) each time I use them. Would it be possible to set, say, the size of the Pencil to 2 and the size of the Eraser to 20 permanently, I mean for the ongoing session?

This would eliminate the need to set the sizes anew each time I use a different tool.

Thanks

Hi,

I am using Gimp 2.8.18 on Debian 9 64-bit Gnome 3.22.2.

My problem: I load a JPG image, add a new layer (fill type: white), paint on the layer, but when I erase some paintstrokes I always erase also the white layer background getting regions of checkerboard pattern.

How can I add a layer I can erase on without damaging the background?

Thanks,

gnuimpcub