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Questions tagged [disparity-mapping]

200 questions
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Disparity maps in light field images not only stereo-based vision but multiple views

I would like to ask about disparity maps in context of multiple views (captured by horizontal and vertical cameras). I understood that disparity map is the difference of the pixel location between a pair of views in stereo-based images. I am…
Ana
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Locate specific pixel from left and right view in the disparity map

I am trying to find a way to extract the depth of a specific pixel present in the left and right view that generate the disparity map. Let's say I have two perfectly rectified left and right view, I am able to automatically recognize through the…
Marco Beccarini
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Flickering depth map OpenCV

after some attempts I managed to get a pretty accurate disparity map of the scene I am filming with my stereo camera, using OpenCV's StereoSGBM function after rectification and calibration of the camera, and computing the disparity. I have also…
Marco Beccarini
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Calibration for cropped stereo pairs

I have a stereo image pair of say 100x100 resolution. I did calibration and I am able to rectify it properly and calculate disparity for the same. Now I have the cropped image of size 50x50 with ROI based on center. If I have to use the same…
Madhu Soodhan
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Estimating depth error for active light stereo-systems?

I want to calculate the depth error for my system using this formula - Here, I need to estimate the value of the disparity error before being able to calculate the actual depth error - and the disparity error depends on the stereo-matching…
r4bb1t
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does disparity maps give depth in meter if focal length and disparity are in pixel?

I am trying to find depth using a stereo camera. I created a depth map or disparity matrix which are from 0 to 255 (pixel value). Now after creating a depth map, I want to find real depth using formula, depth =…
Nikhil Manali
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Read a .pfm file in Matlab?

I am currently working on a disparity map estimation project in Matlab. I am using the middlebury datasets including ground-truth disparities in PFM format. I don't know how to load this particular format in Matlab. Could anyone help me? Thanks I…
M.Fox
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OpenCV + CUDA-stereobm + Compute 7.5 hangs (freezes)

I'm running cv::cuda::StereoBM, and it works find on a Tesla K80. (Compute capability 3.7.) Precisely the same code, with precisely the same system libraries, it hangs on a Geforce RTX 2080 Ti. (Compute capability 7.5.) I've got other CUDA code…
Zendel
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How can I create 3D model of terrain from satellite images using Python and openCV?

I'm doing my project where I have a two satellite images (I consider not a stereo-pair, but satellite photos of the same terrain but the differ angle/height/satellite etc, and maybe even in jpeg format) and my end goal is to create a 3D model using…
Snezhanna
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Constructing right-view image from left-view image and disparity map

I am trying to construct a right-view image from a left-view image and its disparity map. I use the middleburry dataset 2003 (http://vision.middlebury.edu/stereo/data/scenes2003/) with the full size images, which means the value v of each pixel in…
yaumn
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Values higher than expected by computing depth from stereo pictures

I need to compute the depth of a 2D points from stereo pictures. But weirdly, when I'm computing it it gets wrong at a distance it should not be (the computing depth is okay at 40cm, and gets noisy starting at 60cm – being higher than the expected…
taubhi
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Stereo Webcam Depth Detection

I'm newbie to computer vision. I'm trying to calculate depth from stereo webcam. I flowed this steps: Camera calibration:Calibrate each camera individually,i got Rms 0.2 and 0.18 then i calibrate both cameras (Rms:0.8) using openCv3. Calculate…
Imen Jmal
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How to have better depth/disparity map image

I just obtained my depth map from 2 stereo cameras. I would like to obtain a better image but I don't know how to proceed. In this image i have already applied Calibration and Gaussian filter like this: grayLeft =…
gaetano ma
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How to compute the true depth given a disparity map of rectified images?

I have calculated a disparity map for a given rectified stereopair! I can calculate my depth using the formula z = (baseline * focal) / (disparity * p) Let's assume that the baseline, focal length and pixel constant p are known and I used the same…
Miau
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compute function in stereomatcher opencv - get disparity

I am newbie to opencv. I am looking to understand steromatcher class compute function and stereoSGBM class compute function. I am following this example, https://docs.opencv.org/3.1.0/d3/d14/tutorial_ximgproc_disparity_filtering.html Ptr…
vishnukumar
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