Distance measuring

[Andrey_Dmitriev]

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@Przemek-2405 wrote:

For the beginning i will be enought if we can measure size of the object

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Then you must know the distance. It is pretty simple geometry, something like that:

And then

Source of the pictures.

In theory you can take smallest known object at known distance, then largest at the same distance, then measure how many pixels are covered, then intermediate size will be proportional.

[Przemek-2405]

Andriej, maybe you know how to do it in labview? Why not use laser, because I need to use camera view.

[Przemek-2405]

 

[Andrey_Dmitriev]

I would like to recommend as "getting started" the Calibration Models Comparison.vi example from NI Vision:

In this example Height of the object measured automatically with different calibration strategies. Start with simple calibration. Technically if you know pixel to real world ratio, then you don't need calibration target, simple calibration will wok for you.