Request: add --no-align / what algorithm is used for alignment?

[tokiAi]

Hi, would it be possible to add a way to use no alignment to use other alignment algorithms. e.g. as parameter --no-align

Also, could you please tell me which alignment algorithm you use. And possibly add this information to the documentation for others.

[PetteriAimonen]

As mentioned in https://github.com/PetteriAimonen/focus-stack#algorithms-used and https://github.com/PetteriAimonen/focus-stack/blob/master/docs/Algorithms.md, the algorithm used is OpenCV findTransformECC.

So far I have not seen cases where the alignment wouldn't work fairly well. If you have such test cases, please post them somewhere.

[tokiAi]

Ah sorry, I must have overlooked it.

So the parameter would be to test other alignment algorithms. I would like to test whether these bring better results.

[PetteriAimonen]

Any such testing is better done by editing the source code. If some algorithm consistently produces better results, only then is there point considering replacement or option.

[mviereck]

An option --no-align is useful if one has already aligned images and want to compare the stacking results of different stacking tools. It is also useful if one provides a frontend where aligning and stacking are done in different steps and the frontend provides different alignment or stacking tools by choice. (This will be the case in my project once I continue to develop it.)

[PetteriAimonen]

Oh well. Not something I'm interested in adding, but I don't oppose a pull request.