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Tourvista

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Location: Leicester UK

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Tuesday, February 15th 2011, 7:11pm

Meter Square Grid

One of our recent clients has requested a meter squared grid to be project on the x axis so viewers can gain a sense of scale (up to 15 meters away from the camera position).

I have a few ways in mind in how I can produce this but it seems to be a little bit more complicated that first thoughts. Has anyone produced anything like this before?

With a fixed camera hight, my initial plan was to create a grid made of rope on a flat area, stitch it together and within Krpano project a vector grid overlay on the X axis at the size the matches the size of my rope grid. At this point I will know that my vector grid is calibrated.

Ideally I think it would be best for Krpano to distort the grid for the necessary projection, rather than simulating this first hand in Photoshop (which I think will be less accurate).

Another question is: does anyone know how I can insert an overlay, fix its position and let krpano take care of the distortion?

*blink*

Zephyr

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Tuesday, February 15th 2011, 10:08pm

you could easily do this in 3d. Do you just want 1 single row of squares 1 by 1 meter? 15 metre from the camera. On which cameraheight do you want it?
I would create a flat circle of 15m radius and a circle of 16meter. that circle would be 2 * pie * 16 around = +/- 100.5 meter. so 1meter would be every, 360 / 100.5 meter= 1 meter every 3.58 degree. Then you extrude the circle with 1meter on z.

In real world, just take a rope of 15meter, tie it to your camera nodal. then you walk back untill the rope is streched, place a pole, walk a bit to left and place another then you connect it with ropes. You would need a lot of poles and alot of rope (100 poles 1 metre from eachother, 100meter rope).
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Tourvista

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Wednesday, February 16th 2011, 2:50pm

I think what you have described is a circular grid scale that will give viewers a sense of distance away from the camera.


In fact I'm looking for 15 lines (15 meters long) each seperated by 1 meter connecting North and South, then the same again from East to west. This will make a 1Meter square grid.

If the room is square and has pipes running along the floor, a viewer will be able to estimate the length of the pipe by following the closest parallel line.

I hope this makes sense.

Tourvista

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Wednesday, February 16th 2011, 3:09pm

Here is a an example of how it needs to be projected. This was made is PS, by placing a normal square grid on the Nadir. Its not accurate by a long shot but represents the concept.


www.clients.tourvista.co.uk/temp/index.html


Ideally, I don't want to create the grid in Photoshop but have it projected as an overlay within Krpano.

Zephyr

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Wednesday, February 16th 2011, 4:41pm

the link is broken, can you show me again?

do you mean something like the grid preview, but then more accurate?
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