physical distance of the marker from the camera

[Shachar Oz]

hey guys,
do you know what do i have to do if i wish to have a better
identification of the marker from a distance longer than one meter?
i have printed out a bigger marker ( A5 paper size ). it gives me a
distance of about 1.5- 1 meters.
i wish to be able to identify a marker from 10-20 meters.

what are the variables that control this issue?
physical variables like: paper quality / light and shade / marker size
or programmatic vars like: markerSegments / markerSize / markerWidth
what is the influence that each variable has on the result?

if someone has already succeeded in doing something like that, i would
love to hear how.

thx,
shachar

[Makc]

On Sat, Dec 26, 2009 at 5:34 PM, Shachar Oz <shach...@gmail.com> wrote:
> hey guys,
> do you know what do i have to do if i wish to have a better
> identification of the marker from a distance longer than one meter?
> i have printed out a bigger marker ( A5 paper size ). it gives me a
> distance of about 1.5- 1 meters.
> i wish to be able to identify a marker from 10-20 meters.

A5 is 148 × 210 millimeters, therefor your required marker dimensions
are 148 × (20 / 1.5) = 1973 mm and 210 × () = 2800 mm, or 2 × 3
meters. that's like a wall or something.