I have been trying for a couple of days to find the relationship between a selection bounding box and the radius which is used for shrink or grow selection.
My first thoughts were that the radius would be half the diagonal of the bounding box, but this appears not to be true.

In the Shrink/Grow/Feather LIVE PREVIEW GIMP by TinT he has used a binary search routine to find the shrink radius which reduces the selection size to zero in order to set the minimum value for the adjustment slider. However, this is very slow for large images.

I thought that there must be a mathematical formula for the shrink radius that would reduce the size of the smallest bounding box side to half of it's original value.

Help from our resident geniuses greatly appreciated!

david.

Hello, I've never had this problem. When I create a new rectangle, it does not generate a layer in the layer panel. I can't select the new object or do anything with it. Does anyone know why? I'd like to attach a screen shot, but the clipboard viewer drives me insane. Any better options there also? Thanks in Advance. J.

Hello, this is my first post here.
Gimp 2.10.36 in windows 10 here
I'm trying to flatten some warped pages of a hastily scanned book. I have found the filter>distortion > bend along lines (sorry, translated from spanish menus) 
The problem is the book has a funny size of 1300 pixel wide x 3500 pixel tall. With this format, the preview is 1 cm wide in my screen, making the tool unusable. The image does'nt even cover the checkered box, and does'nt change when the dialog is resized.
Is there a way to increase the preview size? Or perhaps is there a tool in gimp more adapted to the job?
Cheers
Antoni

   

Hi.

I'm puzzled by an example where level adjustments (extreme settings) can lead to the resulting in color saturation go to maximum.

So my first question: When applying color levels (High input < 6) on a layer mask, is it normal that the resulting output colors can become "scrambled" ?

Second question: Layer mask in general - Is it true that the layer mask can only - for each pixel - set a transparency between 0-100? Or is there exceptions from this that I haven't considered?

Because if the above questions have the answers "No" and then "Yes", then it seems I just found a bug in Gimp.  Can you have a look at this file (original colors in layers and resulting colors after layer mask) and tell me if this output is normal or if I should file a bug.

Attached Files

  generator-symbol_impossibleColors.xcf (Size: 1,017.46 KB / Downloads: 1000)

Be gentle.   I'm a 70 y/o learning gimp.  have watched 100's of videos and can navigate fairly well, however I have
some cognitive block about layer masks and understanding language such as "white-full opacity" , "black-full transparency", etc.

As seen in the attached pic, I even set up an example similar to what gimp.org had on the layer mask page.  I cannot get my head around
the terminology and what I'm seeing.   The photo on the bottom layer is shows clearly where I painted white, gray and black on the mask.

My brain is telling me that the white layer mask should have covered the photo with a white layer.  

It's a combination of the language thats confusing me, along with the idea of the mask layer.  I mostly understand layers in general, but I'm hoping
someone will help me with a clearer conceptualization of what the "white-full opacity" & "black-full transparency" really mean.   Perhaps substitute another
word or something???

Perhaps is has to do with the idea of a transparent layer actually being a layer and not invisible.    my head is spinning.

hope this is intelligible.  appreciate your suggestions
rich

Attached Files

Image(s)
   

Since a few releases of both GIMP and GMIC, I have  a recurrent error each time GMIC  is invoked from filters list. The filters are running in the end, but I have to acknoledge many error windows.

Error message  say that "blablabla entry point in xyz dll  is not found". I think after several unsuccessful attempts, Gmic manages to locate and load adequate DLL's .


I think the mess in directory path  is due to several historical version of gimp that are still present on the computer : at install time, GMIC qt is probably fooled and get installed at the wrong place, thus causing subsequent errors.

The work around solution is to seek and uninstall all "fossile" occurence of GIMP and GMIC.  I have used uninstaller of GIMP, and uninstaller also when they where found in gmic directories. After that, I have erased (yes, this is somewhat brutal)  all old directories related to GIMP / GMIC.

I have lost customization settings but it was not critical at that point.  Make simply sure to save your settings (i don't know how to do it) and also the references of your favorite add-ons , so that you can reinstall them.

So far so good, GMIC is accessed flawlessly without any error window popping up.

How can I add and remove tools from the current toolbox?

Is it required to setup a new (=my own) toolbox or can I modify the default toolbox (preferred)

Hi
    just  wondering is it  possible  to  get  2  windows  up  ?
Im  thinking of  using  the  clone  tool  and   getting   content  from
one  window   onto   a  pic  on the  other  window  ...

thanks  for  advice or  comments

Hey guys,

I installed a plugin to test it but I can't find it anywhere.
I looked inside the Python-Fu menu, I didn't find it.
Also in Filters - Python-Fu, without success.

In fact I'm not even sure what the name of this plugin would be.

Could anyone reveal the location of this plugin? Please!

Below is the plugin code: 

Hi all,

GIMP version 2.10.30
OS - Ubuntu 22.04.3 LTS desktop

My Pen Tools are not working.  Please advise whehter to check and how to fix the problem.

Thanks

Regards