Hello to everyone, I'm new to this forum. I use freq. separation for a while now, and I've done quite a lot of research on the subject, but I could not find one article that thoroughly explains (for non-math buffs) how FS works. I would like to understand why it happens as it does, but I'm quite stupid for mathematics... I've read many forum posts with dropped bits of info here and there, but I can't seem to get the big picture: why do I use subtract in 8 bit and add in 16? What are the offset and scale settings? Normal waves have negative values, and I have to scale this to only positive ones (waves in images have no negative values - nothing can be darker than black), so I suppose I do just that, but I would like to know how exactly the separation and the apply image works. I've read somewhere that an 8-bit image has no exact 50% (that's ok), but the 16 bit have - how? 65,536 is an even number, as 256, so it can't have an EXACT midpoint, it just approximates better. Am I right?

Can anyone shed some light on this for me, please? It would be a great help. I can use the method without knowing any math, but somehow I just want to understand it deeper, now I feel like having someone elses clothes on, I just use it, but it isn't mine... Thank you very much for your help.

BTW, could anyone link an action that can separate an image into any number of splits? I remember seeing one somewhere, but I just lost track of it and couldn't find it later. Thank you.

Can anyone shed some light on this for me, please? It would be a great help. I can use the method without knowing any math, but somehow I just want to understand it deeper, now I feel like having someone elses clothes on, I just use it, but it isn't mine... Thank you very much for your help.

BTW, could anyone link an action that can separate an image into any number of splits? I remember seeing one somewhere, but I just lost track of it and couldn't find it later. Thank you.

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