Stereo vision, or Stereopsis, is the process in visual perception leading to the perception of depth from the two slightly different projections of an object onto the two eyes. Computer stereo vision mimics this behaviour by having the computer compare multiple images of a scene and determine the ...

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Stereo Camera: Origin of Epipolar line is Lens or Image sensor?

In a standard Stereo camera set-up where is the Origin of Epipolar line located? whether it is at the Lens or at Image sensor? I'm using Opencv Stereo camera calibration method to calibrate my camera....
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How can 3D structure of scene be determined from video frames?

This is an exam question, related to 3D reconstruction from images. The figure below shows a frame from a video sequence obtained by a single video camera moving through a static indoor scene. The ...
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Implementing Markov Random Field

I want to implement MRF for stereo vision.But I am a bit confused about the theory of the Belief propagation network. I create a graph, where nodes are the pixels and edges connect neighboring pixels. ...
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Time of flight vs. stereo camera

I at the moment trying to decide whether what type of camera will suite the project i am currently working on/drawbacks. The project i am working on involves tracking a moving vehicle, and try to ...
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How to choose the threshold in uv disparity?

Several papers on uv disparity or v disparity state that once the uv disparity maps are computed a threshold should be applied. For instance in Alexandru Iloie UV disparity based obstacle detection ......
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What is the difference between a range image and a depth map?

https://en.wikipedia.org/wiki/Depth_map https://en.wikipedia.org/wiki/Range_imaging To me, it sounds like they are the same thing, except depth map implies only having the z coordinate info. But ...
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Finding Distance between Cameras in Stereo Vision

We know how to create disparity map from stereo vision with OpenCV. My question is How can we find/estimate distance between cameras from two image taken from these cameras in OpenCV?
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Is there a difference between Image Alignment and Stereo Rectification for stereo correspondence or matching?

As far as I know, Image alignment just finds the best fit given two images of the same scene. Whereas Image rectification, with regards to stereo vision, warps the images so that the epipolar lines ...
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What is the purpose of bundle adjustment?

So, my understanding of stereovision is that you essentially have two cameras. Then, offline, you perform camera calibration with checkerboards to get intrinsic camera properties as well as the ...
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Can disparity range from negative to positive values for parallel cameras?

In my stereo-rectified camera pair (not physical, but two positions of the same camera), when I project some 3D points in both images to find a rough disparity range, I often get a range that goes ...
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How to measure image coincidence in an optical rangefinder

I have a couple of USB webcams (fixed focal length) setup as a simple stereoscopic rangefinder, spaced N mm apart with each rotated by M degrees towards the centerline, and I've calibrated the cameras ...
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How to calculate binocular overlap

I have two cameras of which I know focal length, principal point, rotation and position. The cameras are in an ideal parallel stereo system. I want to know with as few calculations as possible how ...
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3answers
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Measuring non-planar objects in image

I'm working on a computer vision application (using openCV) and the goal is to measure the width of an object before/after it falls on a container. So after the fall its position will be random, ...
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Image correlation confidence measure

I am trying to calculate the disparity between stereo image pairs. I'm using what appears to be the standard approach of correlating between a window of pixels from one image and a sliding window ...
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115 views

Beyond cross-eyed 3D (VR application)

Making static 3D image is very simple - we just take image pair with something like this: then we can see 3D image by putting the left and right eye image side by side and crossing eyes or ...
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488 views

Why do object-boundaries look better on a badly rectified image?(openCV stereo correspondence)

I got 2 pictures which is almost parallel, and not positioned very far from each other. I'm using OpenCV to try to create a disparity map (Stereo correspondence). Because I'm trying to use it in a ...
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153 views

Incorporating Radial Distortion in Imaging Model

I'm currently developing a multi-view stereo system but I'm confused as to how all the standard equations in Structure from Motion are affected in the presence of radial and decentering distortion. ...
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How do you measure the accuracy of a stereo system?

I have a philosophical question of sorts for users familiar with a multi-view stereo setup. Imagine that I need to measure the dimensions of a large building and I take several photos of the building ...
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In computer stereo vision, what does it mean to “look in”?

In trying to understand this answer to my earlier question, can someone explain why it is important that the cameras are not in the same plane when the focal distance is large compared to the ...
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229 views

How can I estimate the spatial resolution of consumer grade electronics?

I have been looking at stereo vision applications, and one working example involves using two USB web cams, mounted together and calibrated. Is there a way to estimate the theoretical spatial ...
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Are Computer Stereo Vision techniques appropriate for sub-millimetre measurements?

I have a project where I would like to image an object and be able to derive the heights of features in this image to sub-millimetre precision (exactly how precise is still yet to be determined, but ...