Need help recomposing an image



To give some insight into my dilemma. I made multiple copies of the image named “original” and then proceeded to use the bandpass filter to create layers with specific “bands” of information from the original image. I have all of the “bands” needed to make the original image, however, I can’t seem to compose them back together accurately.

I was told to try gimp’s grain merge a go, but as you can see in the file, it does not look like the original.

How should I approach solving it?


(Boris Hajdukovic) #2

Hello @camo_steve

What do you want to achieve with bandpass filters? If you need frequency separation, you can also use “split details [wavelets]” filter in G’MIC:

and you will get layers with separate frequencies merged together with grain merge blend mode in GIMP that look like original:

BTW, why did you save your image montage as a PSD (Photoshop) file?


@camo_steve Welcome to the forum. I haven’t used bandpass (tutorial) before but it looks more complex than split_details. Grain merge simply won’t do. Please answer the following questions:

  1. Which bandpass filter did you use? G’MIC (GIMP), G’MIC (CLI) or something else?
  2. What settings and workflow did you use? Do you still have the original?
  3. What are you trying to achieve with band separation?