98
questions
2
votes
1
answer
116
views
OpenCV findHomography giving inacurate result
I am having trouble with the findHomography function in OpenCV, it is not translating even my corner points correctly.
Here is the code I have to calculate the homography.
std::vector<cv::Point> ...
- 73
1
vote
0
answers
614
views
Alignment of depth and color image on an oak-d camera
I'm trying to create an RGB-D dataset and I'm having some troubles in aligning the color and depth images from the oak-d camera. The depth image is aligned with the right camera of the stereo rig and ...
0
votes
1
answer
2k
views
Bad Essential Matrix With OpenCV
Overview
I'm writing a simple Python program to calculate the distance to a chosen target from a pair of two arbitrarily located stereo images. Both images are taken from a single camera with known ...
- 1
0
votes
0
answers
288
views
Determine adjustment factor for projecting 2D image with FOV from 3D point cloud which is constructed using different FOV
I am trying to project a 2D image from a 3D point cloud. Herein, the 3D point cloud is constructed using RGB and Depth images whose FOV is 120 degree. Once the 3D point cloud is constructed, I wanted ...
- 81
0
votes
1
answer
747
views
Depth to world registration hololens2 unity
I'm working on a program on hololens2 research mode on unity. Hololens give us a depth image that is distance from depth sensor to object in front, for every pixel.
What I do is for every pixel I ...
0
votes
1
answer
59
views
The reason for the half integer coordinates
I am reading some projective geometry image warping code from Google
def WarpCoordinatesWithHomography(homography, rect, cfg):
"""Computes the warped coordinates from rect through ...
- 649
4
votes
1
answer
2k
views
Mapping between different camera views
I have a calibrated (virtual) camera in Blender that views a roughly planar object. I make an image from a first camera pose P0 and move the camera to a new pose P1. So I have the 4x4 camera matrix ...
- 1,665
0
votes
0
answers
111
views
Python- Projecting a circle with camera.Camera class
I am currently projecting a circle with the camera.Camera class and different viewing angles.
Specifications:
Circle center -> [0 , 0, 1]
Camera center -> [0, 0, 0] (looking up the z-axis)
I ...
- 1
0
votes
1
answer
697
views
Finding inner common tangent to a pair of conics
I have been trying to get the common tangents to two rotated ellipse. I was following the method given by Edward Doolittle in the following thread. The two ellipses are given as the equation given in ...
0
votes
1
answer
439
views
Sampling perspective (sub)views from fisheye image
I have a problem trying to select virtual subimages (lets call them ROIs) in a fisheye image which then I want to undistort.
I have the fisheye calibration parameters following. Scaramuzza calibration ...
- 35
0
votes
0
answers
42
views
Given a closed convex curve, let a central convex curve circumscribe it, then what is the minimum of B/A?(A and B are their corresponding areas)
I guess the answer is 2, but I cannot prove it.
I mean supermum of the minimum B/A among all A.
Notice:
Central convex curve means the convex curve is symmetric about a point in it, that is, when you ...
0
votes
0
answers
268
views
Why use frustum in OpenGL on top of simple projection?
Let's consider, for simplicity, a 3D scene where, after applying model and view matrices, all vertices are inside a cube [-1,-1,-1]...[1,1,1].
Based on the geometry set up shown on the image below, ...
user1481126
2
votes
1
answer
7k
views
Compute Homography Matrix based on intrinsic and extrinsic camera parameters
I am willing to perform a 360° Panorama stitching for 6 fish-eye cameras.
In order to find the relation among cameras I need to compute the Homography Matrix. The latter is usually computed by finding ...
- 141
2
votes
1
answer
631
views
Project coordinate system onto angled planar surface in image
I want to define a coordinate system projected onto some planar surface within the image. I just need some hints and ideas for how to implement this, not necessarily code, but everything is ...
- 47
0
votes
1
answer
3k
views
How to construct camera matrix from known parameters
I wish to project an image taken with a camera for which I know all parameters (focal length, sensor size, X, Y, Z, rotation (omega, phi, kappa) on a 2D plane. I know that I need to construct a camera ...
