Name of this transformation? Geometric, Affine,

Question

I've been looking around the web and I cant seem to find the name for this specific transformation. Basically I want to go from this:

(don't mind the curve, it's only for presentation) to this:

.

The picture itself isn't necessary to transform because I can just use an already above view picture but what I want is to transform the curve from picture 1 so it would show it like it is in picture 2, because the entry angle of the curve hitting the pins on picture 1 isn't the same as the one shown on picture 2.

And what are the theoretical steps of doing this? Thanks

Answer 1

Ignoring the pins entirely, because they'll just turn weird, what you're looking for is called perspective control , used to transform image data such that lines that "should" be parallel end up parallel, with "the thing you do" having quite a few names depending on how precise you want to get...

What you're looking for is...

1. a colinear mapping called
2. a homographic transform , but specifically
3. a 3d projection , which is one of many
4. anamorphic projections

Of those, (3) is going to get you all the programming details, whereas (1) and (2) will find you mathematical insight ( if you can read the language of maths), and (4) will teach you about art.

And of course, because what you really want is python code to do this for you: you probably want to dig into SO posts like " Automatic perspective correction OpenCV " and related posts.