Convert complex mesh of building to simple cube combination

Hi

Firstly, sorry for my poor enlglish.

I have a complex mesh of building which generated from Aerial photogrammetry.

I wanna simplify or convert this complex model to super simple cube shape.

First image is original state complex mesh of building

and second image is the appearance of the building I want to create.

Currently, it’s a cube combination of a similar shape has been created by hand.

Is there any ideas for me?? Thank you !

This is a very complex task… a simple convex hull would help because too big… the bottom areashas to be detected as ground ans some how deleted… then a convex hull may be a start… deleting the vertices very near to this… adding an (inverse ?) concev hull to substract the upper part… recursivley trying this approuch but this will not help fro slanted roofs… the deth of the recursion has to be controlled checked…

I guess there are thousend of scientific papers about reconstruction building from aerial data…

(yes there are…)

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Hi Okidoki
As you said, I am also referencing papers. Your comment might be a hint. Thank you for your comment !