Hello!

Due to the need of my research, I eagerly need the specific information of
location of camera.

The help file only tells location is the position of the camera, but which
part of a real camera does this position describe? Is it the optic center,
principle point or other parameter of a real camera?

Thanks for your time.

Simon^__^

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Am 06.01.2014 07:06, schrieb Simon:

> Due to the need of my research, I eagerly need the specific information of
> location of camera.
>
> The help file only tells location is the position of the camera, but which
> part of a real camera does this position describe? Is it the optic center,
> principle point or other parameter of a real camera?

I'm not an expert at Gaussian optics (just learned about it right now 
from Wikipedia :-)), but it would seem to me that the camera location 
defines none of the cardinal points, but rather the no-parallax point 
(aka center of perspective, perspective point, view point or projection 
centre).

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Le 06/01/2014 07:06, Simon a écrit :
> Hello!
> 
> Due to the need of my research, I eagerly need the specific information of
> location of camera.
> 
> The help file only tells location is the position of the camera, but which
> part of a real camera does this position describe? Is it the optic center,
> principle point or other parameter of a real camera?
> 
> Thanks for your time.
> 
> Simon^__^

Assuming a perspective camera (the default), the location of the
Povray's camera is equivalent to the location of the pinhole in the
perfect camera obscura.

for orthographic camera, it is the location of the center of the picture.




-- 
Just because nobody complains does not mean all parachutes are perfect.

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Le_Forgeron <lef### [at] freefr> wrote:
> Le 06/01/2014 07:06, Simon a écrit :
> > Hello!
> >
> > Due to the need of my research, I eagerly need the specific information of
> > location of camera.
> >
> > The help file only tells location is the position of the camera, but which
> > part of a real camera does this position describe? Is it the optic center,
> > principle point or other parameter of a real camera?
> >
> > Thanks for your time.
> >
> > Simon^__^
>
> Assuming a perspective camera (the default), the location of the
> Povray's camera is equivalent to the location of the pinhole in the
> perfect camera obscura.
>
> for orthographic camera, it is the location of the center of the picture.
>
>
>
>
> --
> Just because nobody complains does not mean all parachutes are perfect.

Thanks for your answer!
Can I regard your answer as a optic center for a perspective camera?

Sorry if I'm in an unpolite manner, this parameter is very important for me.

Simon

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Am 08.01.2014 07:45, schrieb Simon:

> Can I regard your answer as a optic center for a perspective camera?

Having read more about the term "optic center", it seems to me like that 
this is indeed a correct term, too - although the internet warns that 
the term is often used erroneously for other stuff as well.

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