Questions tagged [disparity-mapping]
192 questions
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Calculate baseline distance between 2 cameras (images)
I want to estimate the depth map between left and right images from "http://perso.lcpc.fr/tarel.jean-philippe/syntim/paires/GrRub.html". I understand that I must first calculate depth from disparity using formula Z = B * F/d
The data set…
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How to detect Dynamic Obstacles in point clouds
I want to implement stereo vision in a robot. I have calculated disparity map and point clouds. now I want to detect Dynamic Obstacles in scene.
Can anyone help me please?
Best Regards
omrn
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Native library for stereo-images and computing disparity/depth map
For a more complex project, I need to compute the approximate, relative distances of objects from two images (from stereo-cameras). Practically what this neat tutorial explains:…
DragonGamer
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Disparity of same center o ftwo images
I use Raspberry Pi with python2.
I'm trying to calculate the disparity of two images captured by the left and right cameras.
But I don't know what code should I use.
All I want to do is make python using the target center of two images(disparity)…
李國維
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OpenCV weight approach for correspondence search and disparities C++
I have an OpenCV application and I have to implement a correspondence search using varying support weights between two image pair. This work is very similar to "Adaptive Support-Weight Approach for Correspondence Search" by Kuk-Jin Yoon and In So…
Franktrt
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Get textured pointcloud with Block-Matching-Algorithm
I want to texture a generated pointcloud with the original image color from two images. For this I calculated the disparity-map with Block-Matching and did the reconstruction. Also writing an export function for .ply-files wasn't a big deal.
My…
attenbe
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Matlab/OpenCV stereo vision distance measurement is not accurate
After stereo calibration, when I run the Matlab example for stereo depth estimation (SDE), the distances are wrong: at about 2 meters, it always reports distance as less than 1m.
And my 3D scene reconstruction looks cone-shaped instead of like the…
Doug Null
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OpenCV StereoSGBM gives really bad disparity map
these is my calibration code:
void calibrate()
{
int numBoards = 10;
int board_w = 6;
int board_h = 9;
Size board_sz = Size(board_w, board_h);
int board_n = board_w*board_h;
vector > object_points;
…
Aram Gevorgyan
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Understanding Disparity Map in Opencv
Can somebody explain me what exactly does a disparity map return. Because there is not much given in the documentation and I have a few questions related to it.
Does it return difference values of pixels with respect to both images?
How to use…
kushal
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How to estimate the disparity/depth map limits from stereo geometry parameters?
i'm trying to estimate an upper limit for the disparity between some points in a stereo pair. I know the following parameters:
converge angle: 2.2°
baseline: 77 mm
focal length: 6.3 mm
Xresolution: 72
Yresolution: 72
resolution unit: 0x2 (inch)
i…
user2614596
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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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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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Changing stereo vision baseline via software
I'm trying to estimate the distance with stereo system of far objects. I have rectified the images acquired after calibration process and I have built the disparity map.
Is it now possible to change the baseline (and the maximum depth achievable)…
Speed87
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Rectifying images on opencv with intrinsic and extrinsic parameters already found
I ran Bouguet's calibration toolbox (http://www.vision.caltech.edu/bouguetj/calib_doc/htmls/example.html) on Matlab and have the parameters from the calibration (intrinsic [focal lengths and principal point offsets] and extrinsic [rotation and…
David
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Using a median operator to combine four initial disparity maps into one
Hi could someone please help I am using matlab to generate a disparity map. I have performed multi-wavelet transforms on two rectified stereo pairs and have used a stereo matching algorithm to combine the corresponding babsebands from each image to…
Sean
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