[tech-3d] Re: window mathematics

[chrisp@xxxxxxxxxxxxxxxxxxxxxxxx]

--- In tech-3d@xxxx, siggyblue@xxxx wrote:
> Chris,
>  I am unclear as to what you are asking.  Could you give an 
> example of what you are talking about  with actual variables? 
> David

Hello David

Basically, I have worked out how to calculate the size of, and 
distance to, the stereo window by measuring various parts of the 
camera, and then substituting these measurements into formulae. This 
will work with a dedicated stereo camera, or with twinned or siamesed 
or even cha-cha-ed mono cameras.

I was hoping that someone will be able to tell me whether or not this 
has been published before, as it would be embarrasing to publish 
something with my name on it and then find out that these formulae 
are already attributed to someone else.

The article I was hoping to publish concerns the derivation of the 
formulae. The implications, accuracy and usefullness I may have to 
leave to more experienced stereo photographers.

For example, the formula for distance is

      bf
d = -------
     (o-i)

d= distance from lenses to window
b= stereo base
f= distance from lenses to film
o= width of that part of image outside the lens axes
i= width of that part of image inside the lens axes

Chris Pickering


------------------------ Yahoo! Groups Sponsor ---------------------~-~>
eGroups is now Yahoo! Groups
Click here for more details
http://click.egroups.com/1/11231/1/_/520353/_/981317216/
---------------------------------------------------------------------_->