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How Does the (Inpho software) calculates the ground coordinates for each pixel in the image

Question asked by ahmadsaleh009@gmail.com on Jan 24, 2016
Latest reply on Jan 29, 2016 by thomas_koch@trimble.com

Hello All,

 

How Does the (Inpho software) calculates the ground coordinates for each pixel in the image

 

I have a conceptual question regarding photogrammetry, what is the formula used to find the (X,Y,Z) on ground. All known software requires inputs like ( focal length, H of the plane, image exteriors (x,y,z, omega, phi, kappa), GCPs, pixel size) then the result is an orthophoto that have accurate coordinates, but I am curious on how does these software calculates the ground coordinate for each pixel in the image !

Is there any formulas/references on this, can I calculate a coordinate for one pixel manually just to check that the software is working fine or just to prove it for myself.

Best Regards

Ahmad

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