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Questions tagged [photogrammetry]

Photogrammetry is the practice of determining the geometric properties of objects from photographic images.

Photogrammetry is the practice of determining the geometric properties of objects from photographic images. Photogrammetry is as old as modern photography and can be dated to the mid-nineteenth century. Photogrammetry uses methods from many disciplines, including optics and projective geometry.

http://en.wikipedia.org/wiki/Photogrammetry

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Low RMS value when calibrating single camera, while high RMS value in stereoCalibrate

I am trying to calibrate a stereo setup consisiting of two identical Canon EOS60D's, which i will be using to do Photogrammetry. To calibrate cameras i am using a high precision circlegrid pattern plate. I was able to detect centre points of…
the_parzival
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Finding the angle of a perspective image

I'm working on a floor design app that allows the user to pick preset floor images and view them within a preset room image. My problem is I'm struggling to get the perspective of the floor image to match the room image properly. I have played…
WagglyWonga
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Strange lines ("seams") appearing when applying texture to threejs model

I am rendering a model imported from a .ctm file into threejs v71. I'm then adding a texture using a MeshBasicMaterial with map. The original model was made in Agisoft Photoscan, exported as .obj, and then converted to OpenCTM format using the…
foobarbecue
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Aligning an image to a point cloud

I am extending a 3D webapp that visualizes point clouds, to support images. The app is based on the open source app, Potree (which in turn uses three.js), and allows measuring distances. A demo of the measurement tools in Potree can be viewed…
Imad
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what are my research areas for image processing project?

For my final year project I'm doing a vehicle detail modification system. the system should be able to these following tasks. I'm using a size image of a vehicle taken from a fixed distance lets say from 5m. and different colors and rim images are…
Visuddha Karunaratne
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OpenCV + photogrammetry

i have a stereopair, photo 1: http://savepic.org/1671682.jpg photo 2: http://savepic.org/1667586.jpg there is coordinate system in each image. How can I find coordinates of point A in this system using OpenCV library. It would be nice to see sample…
V1t
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Meshroom: how to access the final camera parameters?

I am trying to write a script which loads the camera parameters from Meshroom and imports them into a CAD program. My first understanding was that these parameters (position, rotation matrix, focal length etc.) are contained in the JSON-file…
thorst
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ARKit Photogrammetry

For the last month, I have been researching ways to create 3D reconstructions from live video. It seems to me like the only option is to use a 3rd party service like Agisoft or Autodesk Capture. However, after the release of ARKit 2.0, I saw this…
Nikhil Sridhar
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error while loading shared libraries: libgfortran.so.1: wrong ELF class: ELFCLASS32

I'm trying to use the Structure From Motion example from here (SFM by Nghiaho). I'm having some problem with the second part of the run process: I've downloaded the PMVS2 (Patch-based Multi-view Stereo Software) from here pmvs2 doc. I've opened the…
Simone Colnaghi
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Computing orientation of a square and displaying an object with the same orientation

I wrote an application which detects a square within an image. To give you a good understanding of how such an image containing such a square, in this case a marker, could look like: What I get, after the detection, are the coordinates of the four…
Robin
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Calculating coordinates of an oblique aerial image

I am using a GoPro HERO 4 on a drone to capture images that need to be georeferenced. Ideally I need coordinates of the captured image's corners relative to the drone. I have the camera's: Altitude Horizontal and vertical field of view Rotation in…
Milan Zelenka
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Library for getting a camera angle via a marker

I'm searching for a library similar to ARToolKit. It needs to support processing a single image and search that image for a marker. If it finds one I want it to return the camera angle / viewpoint based of the marker. I couldn't find anything via…
Robin
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WPF 3-D performance for head-tracking app

I’m working on creating a full-screen 3-D app (based on Johnny Lee's Wii head tracking app) with some augmented reality features, and it seems that WPF is too slow to render even the simple models I’m using at a reasonable frame rate. I think the…
Jonathan Schuster
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How can I stitch together many images to provide a 3D immersive experience like Photosynth?

I'd like to create a Photosynth like experience that allows a user to navigate around a virtual environment from a collection of many pictures. For this project I'm limited to using WPF / .NET to create the application. Ideally I'd like a…
James Cadd
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Extracting surveillance camera positions from streetview images

Related to my previous question, is there some realistic chance to extract surveillance camera positions out of google streetview pictures by means of computer vision algorithms? I'm no expert in that area. But it should be easier than face…
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