Create a new frame that contains common images from two other frames?
 For example, I have two frames for a calendar image of January 2018. Frame 1 has all the days except the SUN column. Frame 2 is missing the month...
View ArticleCalibration of a stereo camera with images 352x288 p.
When you perform the calibration of the stereo camera on images with a resolution less than 640x480, large errors are obtained. For example, using images with a resolution of 352x288 p. the errors...
View ArticleSelection of parameters for building a depth map
There is a calibrated stereopair with which I build a depth map using the StereoSGBM algorithm from the openCV library. The algorithm provides the ability to configure via the built-in parameters:...
View ArticleUnderstanding the Result of Camera Calibration and its Units
Hi, I am quite new to camera calibration. I have 35 images, based on the following functions : findChessboardCorners() cornerSubPix() drawChessboardCorners() calibrateCamera() I now have 1. Camera...
View ArticleStereo calibration: number of images vs RMS error
I am trying to calibrate a stereo pair using opencv. For calibration I used the example program from opencv/samples/cpp/stereo_calib.cpp. I achieved RMS error 0.17 (av. epipolar error 0.24) with the...
View ArticleBad Results - Stereo Calibration - Rectification - Correspondence
Hi I am trying to calibration intrinsics and extrinsic of my stereo camera, then rectify them and find the correspondence point. Original and Result Image : [Images...
View Articlefinding chessboard corners doesn't work on thresholded images
I have some images like this which cv2.findchessboardcorners fails on.  I thought this was a lighting issue, so I thought I'd simplify the problem...
View Articlestereo vision: map points in one view to the other view
I have two views of an experiment. I would like to map points in the left image to predicted locations in the right image. so far, I have done the following: 1. Calibrated both cameras with...
View ArticleGot an error in stereo vision fish eye camera calibration
The error I am geting is: error: (-5:Bad argument) When the input arrays in add/subtract/multiply/divide functions have different types, the output array type must be explicitly specified in function...
View ArticleHow to find the depth (distance from the camera to the object) in m from...
Hi Im using two point Grey Chameleon3 mono camera set up as Master Salve and synchronized so can work as stereo camera. Then was following the OpenCV tutorial to calibrate the cameras. I got 70 samples...
View ArticleinitStereoRectify does not handle distortion correctly
##### System information (version) - OpenCV => 3.4.1 - Operating System / Platform => Windows 64 Bit - Compiler => Visual Studio 2013 + Python Bindings ##### Detailed description When using...
View ArticleGet accurate depth from two monocular cameras (working as stereo) by long...
Hello I have two Cahmeleon3 mono cameras and made it work as stereo (as Master Slave) synchronized. I need to use them for long distances object detection and collision avoidance /obstacle detection....
View ArticleWhat is the output of reprojectImageTo3D?
In the documentation, it says the output contains the 3D coordinates of the point (x,y), but I don't know if this means the output is (x,y,z) or (x,y,d). This is further confused by the input ddepth,...
View ArticleHow to correctly triangluate points with a stereo camera setup
Hello, i need to triangluate points from two stereo cameras. I have a setup with two cameras that are tilted with an angle of 40° between the image planes. As far as I understand the process, I do the...
View ArticleStereo calibration: mapping between cameras' coordinate systems
I need to find a mapping between two cameras' coordinate systems. I have intrinsics and extrinsics of my two cameras computed previously, so I put them to [stereoCalibrate][1] function with...
View Articlepython cv2 stereoCalibrate
Greetings, When trying to use the python function cv2.stereCalibrate() I am receiving an "Assertion error -215". I am able to get a successful monocular calibration with cv2.cameraCalibrate(). The...
View ArticleErroneous projection matrix due to stereoRectify() ?
I have the following situation: - 2x cameras with 2048x1024 px resolution of the same type - Some hardware black box calculating a depth image from the input with a resolution of 960x440 I have a valid...
View ArticleStereo Calibration using sample code
Hi Guys, I wish to calibrate a stereo setup using the sample code provided by OpenCV ( cpp-example-stereo_calib ) . I have tried the sample code for checkerboard calibration using 33 pairs of stereo...
View ArticleStereo Camera Calibration Problem
Hi, I have two cameras. I calibrated them separately but i couldn't achieve stereo calibration. Here is my example pictures: 1. Left Distorted:  2....
View ArticleTriangulate Chessboard gives weird results
Hi all, So I'm trying to create a projection in 3D with use of stereo camera with use of Python. I found the intrinsic camera calibration parameters, which seem good. Then I find the chessboard corners...
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