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Author Topic: Structure from forward motion ?  (Read 3287 times)

nadar

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Structure from forward motion ?
« on: October 31, 2014, 11:17:09 AM »
is it possble to reconstruct a 3D model from images acquired with the line of sight parallel to the movement direction ?
I'm trying to build a model of a street using a single camera placed on a vehicle and aiming forward and more or less horizontally.
I'm interested by the road flooring, but also by buildings located on the sides.

Is this geometry compatible with the basic requirements of photogrammetry (e.e epipolarity), or does SFM algorithm circumvene this ?

Wishgranter

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Re: Structure from forward motion ?
« Reply #1 on: October 31, 2014, 12:55:48 PM »
try the "beta" version, it should work, but its not ideal.....
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bigben

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Re: Structure from forward motion ?
« Reply #2 on: November 02, 2014, 08:50:44 AM »
..add to that, try a full frame fisheye. That will give you overlapping parts of the images that are at more oblique angles.

nadar

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Re: Structure from forward motion ?
« Reply #3 on: November 03, 2014, 03:20:09 PM »
a big problem with fisheye lenses is the higly variable resolution you get, from very small pixels in the center to "infinite" size in the borders. Not ideal for reconstruction I guess
(tried once with a 170° gopro installed on a plane for vertical photography, but not tried for terrestrial forward motion)

nawaz

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Re: Structure from forward motion ?
« Reply #4 on: November 06, 2014, 02:09:45 PM »
is it possble to reconstruct a 3D model from images acquired with the line of sight parallel to the movement direction ?





« Last Edit: December 02, 2014, 09:35:00 AM by nawaz »
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