Questions tagged [3d]
The 3d tag has no usage guidance.
92
questions
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What is the Fourier Transform integral equation for a 1D signal and how can it be expanded into 2D, 3D, and 4D?
I know that
is the 1D Fourier Transform (FT), and the 2D FT is and 3D FT is , but I am not sure whether these expressions are in fact Fourier transform integral equations for a 1D signal, expanded ...
- 13
1
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30
views
Depth estimation using phase shifted sine waves
For 3 phase shifted sine waves using the projected pattern: I = sin(x + δi) where δ ∈ [-2pi/3, 0, +2pi/3] which is then projected onto a scene. The resulting image is captured with a camera. I am ...
- 111
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How to understand the basis sinusoids of 3D FFT?
I understand intuitively the concept of Fourier transforms of 1D signals and 2D images. In the case of a 1D signal, an FFT gives the relative contribution of sinusoids with different frequencies and ...
- 133
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130
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calibrating camera using 3d objects such as rubik's cube?
Hello all hope everyone is doing fine.
I have a vision related problem where I want to calibrate my camera using a 3d object such as rubik's cube with known dimensions. I have a cube with 60mm length, ...
- 11
0
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38
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Tracking vectors in 3D
A 3D object with smooth surface is given as in the figure. There exist two vectors $v_1$ and $v_2$ on different points on the surface. These vectors represent velocity vectors on different moments in ...
- 101
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43
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3D-to-3D pose estimation
Given a set of 3D points with their coordinates in 2 different coordinate systems, what is the correct algorithm to use in order to estimate the relative rotation and translation of the coordinate ...
- 11
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0
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62
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Get Length, Breadth and Width using Intel Real Sense Camera
I want to find 3d dimensions of an object in an image. With mobile phone camera and using the code here I can compute dimensions of an object within an image using a reference object.
Following are ...
Lopez
1
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18
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Finding optimal translation & rotation to place a 3d model into its visual hull
The title already sums up my question pretty well:
I've got a pretty accurate 3d model of some object. This object is usually non-convex and it also may have some holes etc.
This object is placed (...
- 11
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524
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Filter 3D volumetric image with a Butterworth filter in Python
I have been looking for a way to filter a 3D volumetric image in python with a Butterworth filter, but I haven't found any good solution.
I have tried this:
...
- 101
2
votes
0
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22
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What is the name of the filter or technique to reduce depth aliasing around object edges when working with camera depth?
I'm working with a point cloud, created by sampling a 2D camera texture and a depth map. The color is combined with the depth and is projected onto a 3D scene to create a "point cloud".
The ...
- 315
2
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2
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515
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HRIR interpolation using VBAP
1) Problem description
I am trying to implement a 3D audio simulator in Python. I am using the HUTUBS dataset as HRIR database (more informations here: https://depositonce.tu-berlin.de/handle/11303/...
1
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52
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Why not use synthetic datasets for training machine vision (deep learning) algorithms?
I am studying some examples of how to perform 3D instance segmentation in indoor scenes, and I have noticed many of the available datasets are from real environments. I was wondering with the ...
- 111
0
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1
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3k
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Making a 3D point cloud from multiple RGB-D images
I have multiple (4 kinect) cameras that give RGB-D (color and depth) information of the same scene from different points of view. I want to make a 3D point cloud out of these depth maps. I can get a ...
3
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2
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128
views
2D to 3D view conversion
I came across this demo by Fox sports:
https://youtu.be/N9SxFf5WCb0
Where they show a player's view in a 360 space. Very smooth and nice.
I was wondering how do they achieve it without any cameras ...
- 193
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322
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Projecting 3D point to 2D image coordinates
I am trying to replicate the projections of a 3D point to 2D using the pinhole camera model and the formula $x = K * [R|-RC] * X$, where $x = s\begin{bmatrix}
u\\
v\\
1
\end{bmatrix}$, $K$ is the ...
- 31