how are the different parameters defined?

[555nase]

Good Morning.

I have severeal questions about different parameters of aligning photos, building dense clouds and meshes. Important is, how these parameters are defined mathematically.


• tie points
• key points
• gradual selection
• calibration parameters
• Reprojection error, Projection accuracy
• Reconstruction uncertainty


• tie points
I read, that the tie points are calulated from the key points. But in what way?

• key points
In what way does the program calculate these points?

• gradual selection
In which way are the different factors calculated?

• calibration parameters
what is b1,b2, k1-4, p1-4 and what is the definition, what is the specification of k/p 1,2,3,4?

• Reprojection error, Projection accuracy
what is the mathematical definition of these factors?

• Reconstruction uncertainty
what is the mathematical definition of this factor?

I would be very thankful, if anyone would be able to answer these questions.