How to Align and Subtract Pre- and Post Surface with an Offset?

3 次查看（过去 30 天）
Lukas Süßmilch
Lukas Süßmilch 2020-7-16
编辑： Lukas Süßmilch 2020-7-16
Hi,
I am currently facing a small problem and hope that someone here can help me.
I have placed 4 indents in a surface in the shape of an rectangle and scanned the surface afterwards (Prescan). Than I have worn out the surface between the 4 indents and scanned it again afterwards (Postscan).
Now I would like to substract the prescan from the postscan and therefore put the 4 indents from post and prescan exactly on the same position on top of each other. So maybe one of you can tell me how I can tell Matlab to align the four indents of both scans exactly, so that I can then subtract both scans from each other and get a "wear volume".The problem is, there is an offset bewetten both scans.
Which might help: The four indentations are the lowest points of the surface, so you could probably tell Matlab to align the lowest point of the pre-surface with the lowest point of the post-surface, and the same for the other indentations and then move all points. However, I do not know how to tell this Matlab. Might be in in the form of: Find lowest point Pre and align it to lowest point Post, then find second lowest point Pre and so on.
I already know how to display the surfaces with surf and also how to put both on top of each other with "hold". I tried Image registration and I tried load the data via Load File, which looks very good at first. However, it does not seem to find any matches there (Dected 0 and 0, Matched 0) and so I can not use Register Images.
Thanks a lot for your help!
Best regards
Lukas

请先登录，再回答此问题。

回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Geometric Transformation and Image Registration 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by