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getting an output with normal landscape

Pixy Hardware
#1

hello
in a project i will mount pixy on a plane facing to the ground.
i know the plane speed, if i can get out some information like how fast the landscape passes by its possible to calculate the height over ground.
i red there are 50 targets possible, so if most of them move from lets say up to down it should be possible to calculate the angular velocity

my question, is a detection of landscape possible, so there are streets, buildings, but not always colors to follow.

plannet height is 300-1000m over ground in daylight
thanks robert

#2

Hello Robert,
It sounds like an interesting application! What you are describing is often called “ground-plane assumption” and it’s fairly powerful. We can help answer some general questions, but many of your questions are difficult to answer.

You might take a look here:

The basic idea is that

y = fY/Z
x = fX/Z

Where y and x are camera (pixel) coordinates.
f is the focal length (calibrated)
and X, Y and Z are 3-d coordinates in your environment.

Hope this helps!

Edward