Hi,
I want to determine the field of view of a camera system, for instance in horizontal direction.
What I plan to do is to position an object with known dimensions centered in the cameras FOV. Then I change the distance between the camera and the object until the object exactly fills the width of the picture. By measuring that distance, I should be able to get the horizontal field of view angle:
alpha_horizontal = 2 x arctan (picture_width/2*distance)
So far so good (unless I have forgotten something), but:
What distance would I measure? Object-image sensor or object-nodal point or something else entirely?
I want to determine the field of view of a camera system, for instance in horizontal direction.
What I plan to do is to position an object with known dimensions centered in the cameras FOV. Then I change the distance between the camera and the object until the object exactly fills the width of the picture. By measuring that distance, I should be able to get the horizontal field of view angle:
alpha_horizontal = 2 x arctan (picture_width/2*distance)
So far so good (unless I have forgotten something), but:
What distance would I measure? Object-image sensor or object-nodal point or something else entirely?
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