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Questions tagged [pose-estimation]

The specific task of determining the position and orientation of an object in an image relative to the camera coordinates is called Pose Estimation.

The pose of a camera is also known as the camera Extrinsic Parameters. It is a 3x4 matrix where the first 3 columns are the rotation (orientation) and the las column is the translation (position).

Camera Pose matrix. Rotation and Translation

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TensorFlow.js PoseNet model keypoints animation

I'm using TensorFlow.js pre-trained PoseNet model to collect and store pose data from my web app. I already have some chunk of JSON with keypoints data I want to analyze to use it as training set for another neural network. Here's the keypoints data…
Alex Khristo
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Feed GStreamer sink into OpenPose

I have a custom USB camera with a custom driver on a custom board Nvidia Jetson TX2 that is not detected through openpose examples. I access the data using GStreamer custom source. I currently pull frames into a CV mat, color convert them and feed…
Marcus Gee
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Estimating the pose of a rectangular object is unstable

I'm using the following code to find the rotational and translation vector of a rectangular object. The height and the width of the rectangular object are 33 and 44 cm respectively. So I'm using the following code to create the object points. width…
user6038900
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Pose Estimation with SolvePNP

I am attempting to solve for the pose of several time-lapse cameras that are overlooking a glacier in Alaska. So far, all estimated pose's have been wildly inaccurate. The units I am using for real world coordinates are UTM's (Easting/Northing) and…
F.Dunbar
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MPII pose estimation dataset: visibility flag not present

From the MPII Dataset Download page we can see that keypoints have a visibility flag called is_visible. This flag indicates if the joint is visible (ocluded) or not. It can take values 0 (not visible) or 1 (visible). However, while exploring the…
cduguet
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How to find camera pose for rigid objects of an image given 3D points in local coordinate system?

Given image points and corresponding 3D points of 7 objects in an image (all objects in their local coordinate system) how can I find camera pose for each of the objects. Some hint that is given to solve this problem is that we need to find…
Muhaddisa Ali
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OpenCV solvePnP image points outside of frame

Is there any problem with passing image points to OpenCV's solvePnP function which do not lie inside the image itself? This includes points with negative coordinates. If have read some tutorials/ answers where it was mentioned implicitely that the…
Commodore Yournero
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Is camera pose estimation with SOLVEPNP_EPNP sensitive to outliers and can this be rectified?

I have to do an assignment in which I should compare the function solvePnP() used with SOLVEPNP_EPNP and solvePnPRansac() used with SOLVEPNP_ITERATIVE. The goal is to calculate a warped image from an input image. To do this, I get an RGB input…
Roland Deschain
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Conversion between keypoints Coco and open pose?

Hi I am currently struggling between converting between popular 2d keypoint output , from COCO keypoints to openpose . I have the following keypoint order from coco keypoints of the order x1,y1,c1 ....x17,y17,c17 where x,y are the x y cordinates and…
tim tensor
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ValueError: Error when checking input: expected lstm_1_input to have 3 dimensions, but got array with shape (6782, 36)

I tried to do human pose action recognition model, I referred this model I like to use LSTM for this model. So I have made some changes in train.py My train.py code: import pandas as pd from enum import Enum import numpy as np from…
Malathi K
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Pose estimation clarification

I am using open cv c++ for estimating the pose of the object. And I am a beginner in pose estimation. I am getting confused with few terms. Basically, if the object is in movement and camera is stationary, the external parameters( rotation and…
van
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Need help for pose estimation of an object using open cv c++

I have the intrinsic and distortion matrix from a calibrated camera. I am using open cv 3.2 c++. I am getting error output of pose estimation of the object. Help me to sort out this error. The values and the error image are attached below. Mat K =…
van
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Facing "No gradients for any variable" Error while training a SIAMESE NETWORK

I'm currently building a model on Tensorflow( ver:1.8 os:Ubuntu MATE16.04) platform. The model's purpose is to detect/match Keypoints of human body. While training, the error "No gradients for any variable" occurred, and I have difficulties to fix…
pharmboy
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error/sensitivity analysis for camera pose estimation

I am testing OpenCV pose estimation with solvePnPRansac. The method uses a parameter reprojectionError which distinguishes inliers/outliers for RANSAC. Assuming that a pose estimation returning T=T(R,t), is it possible to find the maximal estimation…
TSL_
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Getting wrong angle of rotation of target using opencv python

I am trying to find out the angle of rotation of an object using opencv python. For this purpose I have detected the target then I am able to find out the rotation vector and I am converting it to rotation matrix and from this matrix I am…
Farzam Alam
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