Totally new- Need help averaging b/w pixels on multiple similar images

Software GIMP
1

Hello and thanks for reading.
This is my first try on editing and I’m totally new to anything related.
I was directed to GIMPS by photos-tips.com and consider myself lucky to have found this software among the jungle out there.
Although, all these terms I found on the program, help posts and tutorials as alpha, masks, layers, gradient, transparency, opacity don’t make much useful sense to me or I find myself too inexperienced to do anything with them.
What I need is to combine a few 9x15 px images of a digit on a black background that are slightly different on their b/w pixels on the edge of the digit depending on their position at this background to make an average digit image that can be scanned on all situations. All my tries were unsucessful so far.
If anyone can help it would be greatly appreciated.
Thanks again.
Best regards.
N.

2

foud the solution on this page https://www.asawicki.info/news_1391_how_to_equally_blend_multiple_images_in_gimp
"Finally, after doing some math with pen and paper, I calculated that to equally blend (average) n images in GIMP, you should:

  • Load all the images as layers - File / Open as Layers.
  • Use default blending mode - “Normal”.
  • Set Opacity for subsequent layers, beginning from the topmost layer, to: 1/n, 1/(n-1), 1/(n-2), …, 1 percent.

For example, I have 5 photos so I give them Opacity: 20, 25, 33, 50, 100"

3

Hi @totalno0b, and welcome!

Good that you have found a solution :slight_smile:
I have to admit that I did not fully understand what
you were after in your first post, but after reading
your follow up, it is a trifle more clear.

However — I wonder whether one or two other
pieces of software might not be faster to use
since they can be automated to a greater degree.
I am thinking of g’mic, and ImageMagick.

I just found this: imagemagick - Blend multiple images with ImageMagic - Stack Overflow
And this: Pat David: ImageMagick Average Blending Files

Have fun!
Claes in Lund, Sweden

4

With ImageMagick, I suggest this:

magick in1.png in2.png in3.png in4.png -evaluate-sequence mean out.png

Or:

magick in*.png -evaluate-sequence mean out.png
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