Calibration: the s scale factor and the p distortion factor

This is a multipart message in MIME format.
--=_alternative 00375D36C1256DDE_=
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

Dear Dr. Kato, and ARToolKit list,

I am wondering if you have a mathematical expression/equation for how the=20
scale factor s and the distortion factor p is defined in ARToolKit?

dist=5Ffactor[2] =3D 100000000.0*p
dist=5Ffactor[3] =3D s

Is there a unit for these numbers?

Actually, I am trying to use calibration data from MATLAB Camera=20
Calibration Toolbox=20
(http://www.vision.caltech.edu/bouguetj/calib=5Fdoc/htmls/parameters.html).=
=20
Do you know how I could modify either these data, or the functions of=20
ARToolKit to make these parameters fit?

I assume that the most important functions would be arParamObserv2Ideal()=20
and arParamIdeal2Observ(), but I am having some difficulties understanding =

the source code. Do you have any documentation for these functions, or=20
some mathematical expressions/equations?

Thank you very much!

Best regards,
Torbj=F8rn Engedal

Associated Scientist
ABB AS Corporate Research Center
--=_alternative 00375D36C1256DDE_=
Content-Type: text/html; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

<br><font size=3D2 face=3D"sans-serif">Dear Dr. Kato, and ARToolKit list,</=
font>
<br>
<br><font size=3D2 face=3D"sans-serif">I am wondering if you have a mathema=
tical expression/equation for how the scale factor s and the distortion fac=
tor p is defined in ARToolKit?</font>
<br>
<br><font size=3D2 face=3D"sans-serif">dist=5Ffactor[2] =3D 100000000.0*p</=
font>
<br><font size=3D2 face=3D"sans-serif">dist=5Ffactor[3] =3D s</font>
<br>
<br><font size=3D2 face=3D"sans-serif">Is there a unit for these numbers?</=
font>
<br>
<br><font size=3D2 face=3D"sans-serif">Actually, I am trying to use calibra=
tion data from MATLAB Camera Calibration Toolbox (http://www.vision.caltech=
.edu/bouguetj/calib=5Fdoc/htmls/parameters.html). Do you know how I could m=
odify either these data, or the functions of ARToolKit to make these parame=
ters fit?</font>
<br>
<br><font size=3D2 face=3D"sans-serif">I assume that the most important fun=
ctions would be arParamObserv2Ideal() and arParamIdeal2Observ(), but I am h=
aving some difficulties understanding the source code. Do you have any docu=
mentation for these functions, or some mathematical expressions/equations?<=
/font>
<br>
<br><font size=3D2 face=3D"sans-serif">Thank you very much!</font>
<br>
<br><font size=3D2 face=3D"sans-serif">Best regards,</font>
<br><font size=3D2 face=3D"sans-serif">Torbj=F8rn Engedal</font>
<br><font size=3D2 face=3D"sans-serif"><br>
Associated Scientist</font>
<br><font size=3D2 face=3D"sans-serif">ABB AS Corporate Research Center</fo=
nt>
--=_alternative 00375D36C1256DDE_=--

From:	torbjorn.engedal@n .........	Received:	Nov 14, 2003
To	kato@s ........................
Subject:	Calibration: the s scale factor and the p distortion factor
This is a multipart message in MIME format. --=_alternative 00375D36C1256DDE_= Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Dear Dr. Kato, and ARToolKit list, I am wondering if you have a mathematical expression/equation for how the=20 scale factor s and the distortion factor p is defined in ARToolKit? dist=5Ffactor[2] =3D 100000000.0p dist=5Ffactor[3] =3D s Is there a unit for these numbers? Actually, I am trying to use calibration data from MATLAB Camera=20 Calibration Toolbox=20 (http://www.vision.caltech.edu/bouguetj/calib=5Fdoc/htmls/parameters.html).= =20 Do you know how I could modify either these data, or the functions of=20 ARToolKit to make these parameters fit? I assume that the most important functions would be arParamObserv2Ideal()=20 and arParamIdeal2Observ(), but I am having some difficulties understanding = the source code. Do you have any documentation for these functions, or=20 some mathematical expressions/equations? Thank you very much! Best regards, Torbj=F8rn Engedal Associated Scientist ABB AS Corporate Research Center --=_alternative 00375D36C1256DDE_= Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <br><font size=3D2 face=3D"sans-serif">Dear Dr. Kato, and ARToolKit list,</= font> <br> <br><font size=3D2 face=3D"sans-serif">I am wondering if you have a mathema= tical expression/equation for how the scale factor s and the distortion fac= tor p is defined in ARToolKit?</font> <br> <br><font size=3D2 face=3D"sans-serif">dist=5Ffactor[2] =3D 100000000.0p</= font> <br><font size=3D2 face=3D"sans-serif">dist=5Ffactor[3] =3D s</font> <br> <br><font size=3D2 face=3D"sans-serif">Is there a unit for these numbers?</= font> <br> <br><font size=3D2 face=3D"sans-serif">Actually, I am trying to use calibra= tion data from MATLAB Camera Calibration Toolbox (http://www.vision.caltech= .edu/bouguetj/calib=5Fdoc/htmls/parameters.html). Do you know how I could m= odify either these data, or the functions of ARToolKit to make these parame= ters fit?</font> <br> <br><font size=3D2 face=3D"sans-serif">I assume that the most important fun= ctions would be arParamObserv2Ideal() and arParamIdeal2Observ(), but I am h= aving some difficulties understanding the source code. Do you have any docu= mentation for these functions, or some mathematical expressions/equations?<= /font> <br> <br><font size=3D2 face=3D"sans-serif">Thank you very much!</font> <br> <br><font size=3D2 face=3D"sans-serif">Best regards,</font> <br><font size=3D2 face=3D"sans-serif">Torbj=F8rn Engedal</font> <br><font size=3D2 face=3D"sans-serif"><br> Associated Scientist</font> <br><font size=3D2 face=3D"sans-serif">ABB AS Corporate Research Center</fo= nt> --=_alternative 00375D36C1256DDE_=--