Rotate signal around midpoint

Hello,

I have taken measurement with a laserscanner (profilometer). It seems that the profilometer was not aligned properly to the object.

How can I rotate the following signal around the midpoint in such a way that it simulates a perfectly aligned laserscanner.

The blue line is my measured signal. The red line is what I want.

Can is use normalization, median, mean, etc...do get the signal I want?

Answer 1

[Chunru]

Try detrend

https://www.mathworks.com/help/matlab/ref/detrend.html?s_tid=doc_ta

[Konvictus177]

I will try it. Seems promising!!

Answer 2

[Matt J]

If the red curve and blue curve consist of corresponding point pairs, then you can use absor,

https://www.mathworks.com/matlabcentral/fileexchange/26186-absolute-orientation-horn-s-method

to roto-align them.

[~,~,result]=absor(blue,red);