Homography mapping calculation (Labview code)

[Klemen]

Hello,

I am posting Labview code to calculate the perspective projective mapping between two planes (homography), assuming that locations of at least 4 corresponding points are known. This can be used for pixel-to-real world mapping by eliminating perspective distortion, after which the measurements of a real world object can be performed. For example, the previous post describes the practical application of this (https://decibel.ni.com/content/blogs/kl3m3n/2015/03/13/optical-water-level-measurements-with-automat...).

Or you can just do some cool stuff like this :

base image

images of koala and penguins (obviously ).

final image (koala and penguins subjected to perspective distortion and inserted into both base image frames).

I am attaching the Labview program to calculate the homography and perform a simple check of the result. The calculated homography can then be used for example to map the pixel-to-real world or pixel-to-pixel coordinates.

Best regards,

K