Questions tagged [reconstruction]
The reconstruction tag has no usage guidance.
9
questions
7
votes
1answer
4k views
Random sampling vs uniform sampling
In this paper of Lustig, he speaks about a something which appears unintuitive: sampling at random may exhibit better performance than sampling uniformly. I tried to understand this starting from page ...
4
votes
4answers
638 views
Reconstructing a sine wave from an interval shorter than half its wavelength
I know that the function that I search is a sine wave of the form
$$A \cdot \sin(x) $$
where my $A$ is unknown. I have samples of the sine wave at discrete points within an interval that's shorter ...
2
votes
2answers
152 views
Method of reconstructing a band-limited signal from discrete samples
I understand current cell phones use digital communications. Given that this industry brings in billions of dollars each year, there is much incentive to get the best performance possible. So what ...
9
votes
3answers
566 views
Signal values we will 'miss' between sampling instances during sampling of band limited signals
According to the Nyquist–Shannon sampling theorem, any continuous time signal with a bandwidth $B$ smaller than Nyquist frequency $f_N=f_s/2$ (with $f_s$ the sampling frequency), which is sampled at ...
4
votes
3answers
2k views
Gradient Domain Reconstruction - Scaling Problem
I am implementing reconstruction of image from gradient domain. This requires solving the following partial differential equation (a Poisson equation) on a 2D grid:
$$\nabla^{2}I=\mathbb{div} G$$
$\...
1
vote
2answers
262 views
Types of interpolation used for reconstruction in DSP?
What are the different types of interpolation used in DSP for reconstruction of analog signal from discrete/digital signal
I am able to somehow learn two types of interpolation
1st is "zero order ...
4
votes
1answer
361 views
What Are the Types of Deconvolution?
I am totally new to image processing and wanted to ask you if you could confirm what I understood. It is about deconvolution:
From what I read we find 2 main types of deconvolution:
1. Analytical
<...
0
votes
1answer
13 views
Projecting a 3D point onto Multiple Cameras in the Same Projective Frame
I need a sanity check. I think I understand the following, but I just can't get it to work.
Suppose that I calculate a trifocal tensor $T$ from three sets of corresponding points in three images (...
0
votes
2answers
2k views
What is the difference between image restoration and image reconstruction?
I am new to image processing. I don't know whether this is the right place to ask, but what is the difference between image restoration and image reconstruction?
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