I have a task to locate an object in 3D coordinate system. Since I have to get almost exact X and Y coordinate, I decided to track one color marker with known Z coordinate that will be placed on th...

Is it possible to use OpenCV's solvePNP with an equirectangular image? I have an equirectangular image and I have four points in this image (red dots) and their pixel coordinates, and then I have 4...

I'm making a pose estimation script for my game. However, it's working at 20-30 fps and not using the whole CPU even if there is no fps limit. It's not using whole GPU too. Can someone help me? Her...

I am working through a Python and OpenCV head pose estimation tutorial found here: https://www.learnopencv.com/head-pose-estimation-using-opencv-and-dlib/ I am able to accurately project a 3D poi...

I run simple test for OpenCV camera pose estimation. Having a photo and the same photo scaled up (zoomed in) I use them to detect features, calculate essential matrix and recover camera poses. Mat...

I have downloaded and am implementing a ML application using the Tensorflow Lite Posenet Model. The output of this model is a heatmap, which is a part of CNN's I am new to. One piece of informatio...

We are working on an AR application in which we need to overlay a 3D model of an object on a video stream of the object. A Unity scene contains the 3D model and a camera is filming the 3D object. T...

I am doing camera calibration from tsai algo. I got intrensic and extrinsic matrix, but how can I reconstruct the 3D coordinates from that inormation? 1) I can use Gaussian Elimination for find...

I have a camera facing the equivalent of a chessboard. I know the world 3d location of the points as well as the 2d location of the corresponding projected points on the camera image. All the world...

I am using the tflite model for posenet from here. It takes input 1*353*257*3 input image and returns 4 arrays of dimens 1*23*17*17, 1*23*17*34, 1*23*17*64 and 1*23*17*1. The model has an output st...

Part 1: Before update I am trying to estimate relative position using two different methods: solvePNP and recoverPose, and seems like R matrices are looks OK with respect to some error, but tr...

I am trying to calculate the exact( 3 cm error rate is acceptable ) distance between aruco marker and camera. I use python, opencv and aruco. I can detect them ( marker side is 0.023 meters which i...

I used the 5 point Method from Nister to calculate the Essential matrix . Further improved Outlier Rejection using RANSAC and Sampson Error Threshold. I randomly choose 5 point sets, estimate the e...

I am using OpenCV in a pose estimation algorithm, where I am also attempting to obtain an estimate of the uncertainty of the estimated pose. My pose estimation is performed through 3D-2D correspond...

I've seen several similar questions, and have some ideas of what I might try, but I don't remember seeing anything about spread. So: I am working on a measurement system, ultimately computer visi...

I've struggled for a week with a problem that I can't rotate a face from non-front like the Left Face in this image to front like the Right Face in the same image. 1). I use a tutorial about del...

Okay so i am trying to find homography of a soccer match. What i have till now is Read images from a folder which is basically many cropped images of a template soccer field. Basically this has i...

Let's say I want to estimate the camera pose for a given image I and I have a set of measurements (e.g. 2D points ui and their associated 3D coordinates Pi) for which I want to minimize the error (...

I'm using "OpenCV for Unity3d" asset (it's the same OpenCV package for Java but translated to C# for Unity3d) in order to create an Augmented Reality application for my MSc Thesis (Computer Science...

I have a rectangular target of known dimensions and location on a wall, and a mobile camera on a robot. As the robot is driving around the room, I need to locate the target and compute the location...

Hello my goal is to develop head-tracking functionality to be used in an aircraft (simulator) cockpit, in order to provide AR to suport civilian pilots to land and fly with bad visual conditions. ...

I am trying to get a global pose estimate from an image of four fiducials with known global positions using my webcam. I have checked many stackexchange questions and a few papers and I cannot see...

I'm using the function solvePnP to estimate the pose of my robot by visual markers. Some times I get wrong results in two consecutives frames. In the file problem.cpp you can see one of these resul...

I have a calibrated camera (intrinsic matrix and distortion coefficients) and I want to know the camera position knowing some 3d points and their corresponding points in the image (2d points). I k...

I want to augment a virtual object at x,y,z meters wrt camera. OpenCV has camera calibration functions but I don't understand how exactly I can give coordinates in meters I tried simulating a Came...