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Questions tagged [stereo-3d]

This tag should only be used for issues directly related to binocular graphical rendering. If you are not displaying different graphical images to the left and right eyes, do not use this tag.

This tag should only be used for issues directly related to binocular graphical rendering. If you are not displaying different graphical images to the left and right eyes, do not use this tag.

Stereo 3D refers to a class of techniques for displaying two different images to a viewer's left and right eyes.

For other types of solid model rendering, use , or a tag specific to your platform.

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Generate subpixel accuracy disparity map in OpenCV

The purpose is to generate disparity map for a calibrated stereo images. A 3D model is projected onto a pair of calibrated stereo images (left/right) by using OpenCV function cv::projectPoints(). The cv::projectPoints() gives points on the 2D image…
linzhang.robot
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Depthmap (Blender) to 3D - What is the baseline

I want to reconstruct a scene from a depthmap using OpenGL. The depthmap is generated using Blender. Now I want to reproject the depthmap to 3D using the following formulas: Z = focallength * baseline / depth X = u*Z / focallength Y = v*Z /…
glethien
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Making 3D model from pictures - writing the stereo matching part

I did not took computer vision in college but I'd like to give it a try. I want to make 3D model from a set of pictures. I know you can do it with 123d catch or agisoft photoscan. doing it is not the point, it's writing the software. At first I want…
sliders_alpha
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Stereo Camera Geometry

This paper describes nicely the geometry of a stereo image system. I am trying to figure out, if the cameras tilted towards each other with a certain angle, how the calculation would change? I looked around but couldn't find any reference to tilted…
user4749
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How to play 2 different tones on the earphone jack using AudioTrack in android

I have a need of playing 2 different tones of different frequency in the earphone. I was trying with AudioTrack class, and was able to do MONO and was not able to do in STEREO mode. I want to play a tone for 50 micro second and stop for next 50…
BNDMD
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how to decide proper disparity value for stereo vision

I am doing a project on stereo vision, basically the system should estimate the distance in real time to avoid collision. The thing is i am not able to decide the proper baseline value . in formula what is the value of disparity.
user3450123
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Accuracy in 3D imaging and number of cameras

Normally in depth sensing for 3D measurement in imaging, people use stereo approach using two cameras. But I have seen some applications and they use three cameras for depth measurement. But idea of image processing algorithm is similar. I am…
batuman
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Stereo Reconstruction Problems using BM and SGBM approaches

I've calibrated my stereo camera using OpenCV's chessboard calibration routine. I am currently using the obtained intrinsic and extrinsic matrices to rectify my messages and use a block matching approach (I've used both BM and SGBM and get the same…
c0d3rz
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nvapi set active eye return error

I am using nvapi with c++; NvAPI_Initialize(); NvAPI_Stereo_Enable(); NvAPI_Stereo_IsEnabled(ref IsStereoEnabled); NvAPI_Stereo_SetDriverMode(NVAPI_STEREO_DRIVER_MODE_DIRECT); NvAPI_Stereo_CreateHandleFromIUnknown(device, &stere_handle); I…
mcelik
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opencv ReprojectImageto3D gives values tending to infinity

I am using stereocalibrate and stereorectify to get the Q matrix. I am giving this as input to cv.ReprojectImageto3D to get the depth map. But when I try to show the results, many values are calculated as infinity. Do I need to change or scale…
katri
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xyz coordinates from reprojectImageTo3D opencv

OpenCV's reprojectImageTo3D is supposed to provide xyz coordinates from a disparity image and a Q projection matrix. It returns a 3-channel unsigned char image, _3dImage. Each element of _3dImage(x,y) contains 3D coordinates of the point (x,y)…
user26302
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Stereo NvAPI init delayed

I have directx9 application and a problem with nVidia's stereo api (automatic mode). Commands like NvAPI_Stereo_Activate() start working ONLY after first present() on directx device. All nvapi initialization was done well (got everywhere NvAPI_OK).
ForceKeeper
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MPO Images from HTC Evo 3D

My team is developing an app for HTC phones that uses the stereo camera. In order to do our processing, we require the still images taken by the 3D camera to be in MPO format. By default it is returning JPS images. How can I make the camera return…
Max Ehrlich
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How to determine Translation and Rotation Matrix using openCV

I have two images taken from a stereo camera.How can I find Translation and Rotation Matrix using OpenCv ?
Aizen
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Stereo rig Calibration using two webcameras with autofocus technology

DISCLAIMER: Apologies for this very large question, as it could take a lot of your time. I have a stereo setup consisting of two webcams these cameras possess auto-focus technology. The stereo setup is in canonical configuration where the cameras…
Richie
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