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Coordinates of an object on a passive image Answered

I have a few questions regarding a project I'm working on. I need some terms so that I can look it up via Google.

I have a map (picture) of a city that is printed on a wooden table. When I move an object directly over it I want to know the coordinates of the object on the map. And also the angle of the object on the map. I thought a sort of a scanner is the best solution. That recognizes the part which it scans (part of the map) and translate this to the coordinates and angle. Does somebody know how this technology is called (and maybe a few links to guide me in the right direction)? Or does somebody else has a better idea how this can me realised?

Thanks in advance!

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ilovebobcats
ilovebobcats

8 years ago

Thanks for you reply :)

Maybe I should have included the image in the first post, sorry for the vague description. Here is a concept render:
http://www.mediafire.com/imageview.php?quickkey=dnsm7ro55u0l7m7&thumb=6

There is a photoframe on the table. The table has the map of a city. I want that if people move the photoframe (digital) on the map the photo will change depending on the position on the table. I head that camera tracking may be the easiest solution, but I want to look at all the alternative before making the decision. I also rather not have something installed above the table. I hope it can be intregrated with the table/photoframe alone


I don't get the first option, do you have a link (or term) or can you explain it further?

That Dead Reckoning seems interesting. Is is a problem if you pick the frame up? Does it has to stay on the map?

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mpilchfamily
mpilchfamily

8 years ago

Go old school and add bars around the sides of the map and section the bars off. Either label them by number or some other means. The you will have the x and y coordinates of the any object on the map. Much like Lat and Long on a conventional map.

I think what your looking for is Dead Reckoning. Its basically what a 3D printer or CNC machine does. It knows a certain point on the field is defined as (0,0). It also knows when it moves it's motor a single step the carriage moves x number of inches/mm. So if x is say 1mm. The if it move 1 step up the x axis and 1 stup up the y axis it's now a (1,1) on the grid.