POV-Ray : Newsgroups : povray.general : About a projection model Server Time: 22 Nov 2019 04:26:02 GMT
  About a projection model (Message 1 to 2 of 2)  
From: fuyok
Subject: About a projection model
Date: 5 Nov 2019 05:10:01
Message: <web.5dc103b17910ee8b2dc3df130@news.povray.org>
Hello. I'm Japanese student.

Can the projection model used in pov-ray be expressed by some equation?

For example, this is the perspective projection conversion formula used in
OpenCV.(It is in "Detailed Description" in the page.)

https://docs.opencv.org/4.1.1/d9/d0c/group__calib3d.html

If you can formulate the ultra wide angle model, fisheye model, or basic
perspection model used in pov-ray, I would like to know the formula. Also, if
there is something that should be referred to in that regard, please let me
know.

I'm sorry in my very poor English.


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From: jr
Subject: Re: About a projection model
Date: 5 Nov 2019 12:00:00
Message: <web.5dc163a7eba77195feeb22ff0@news.povray.org>
hi,

"fuyok" <nya### [at] ichigome> wrote:
> Hello. I'm Japanese student.
>
> Can the projection model used in pov-ray be expressed by some equation?
>
> For example, this is the perspective projection conversion formula used in
> OpenCV.(It is in "Detailed Description" in the page.)
>
> https://docs.opencv.org/4.1.1/d9/d0c/group__calib3d.html
>
> If you can formulate the ultra wide angle model, fisheye model, or basic
> perspection model used in pov-ray, I would like to know the formula. Also, if
> there is something that should be referred to in that regard, please let me
> know.

I guess you already looked through the documentation?
<http://wiki.povray.org/content/Reference:Camera>

the illustrations accompanying each camera type may give you dome information.

> I'm sorry in my very poor English.

(it's pretty good, actually.  (and better than my Japanese.  :-)))


regards, jr.


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