Questions tagged [image-processing]

The tag has no usage guidance.

18 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
3
votes
0answers
375 views

Maximum-Entropy Method deconvolution implementation?

I am looking for an implementation of the Maximum Entropy Method for image deconvolution, ideally in MATLAB or Mathematica. I'm trying to reconstruct an image from fringe visibilities, as is often ...
2
votes
0answers
451 views

Difference between Fast Fourier transform of a 2D lattice image and its reciprocal lattice image

I have constructed an image of nXn pixels with each pixel having values either 0 or 1. I have added circles in the form of square lattice with definite period a. The image basically looks like (a). ...
2
votes
1answer
224 views

How do they draw collision pictures in Atlas?

Is the picture below a simulation? How to they draw these pictures? The picture is from here.
1
vote
1answer
138 views

Difference Between Angular Resolution and Spatial Resolution of optical device (Camera)

As per wikipedia angular resolution is the ability of device to capture minute details of an object and is the same definition in case of spatial resolution. Whats the difference Between Angular ...
1
vote
0answers
111 views

What is the pixel size of Hitachi SU8230 SEM at 100k magnification?

I have a publication showing an SEM micrograph taken by Hitachi SU8230 model. Is there anyway to learn the pixel sizes?
1
vote
0answers
72 views

What is the concept of phase congruency?

I am beginner in signal processing. I am studying the importance of phase in signals. I want to know about Phase Congruency, but there is very little information available on internet. So can anybody ...
0
votes
3answers
27 views

What is the theoretical limit for image sensors

Telescopes are principaly limited by a diffraction-limit. Does this limit affect the image sensor? The Rubin Observatory LSST Camera, the biggest camera in the world with 3.2 gigapixels is having a ...
0
votes
0answers
13 views

How to evaluate the parallax error in the measure of diffraction rings' diameter?

I have to estimate with an image analysis the diameter of the rings generated by the diffraction of an electron beam with a polycrystalline graphite target. The pattern is made visible by a ...
0
votes
0answers
29 views

Calculate Modulation Transfer Function from Line Spread Function

I am trying to measure the MTF of a radiology imaging system from a set of CT scans of a phantom. The imaging system is primarily designed for stationary scans so the CT images were low in spatial ...
0
votes
0answers
12 views

Probabilistic determination of syzygy

Is there a framework for describing the probabilistic confidence of an $N$-body syzygy? Forgive me if I'm misusing terminology: I'd like to know how physicists/astronmers model the confidence of "...
0
votes
0answers
25 views

About regularization cost function present in Hasselman's 91 (Retrieve wave spectra)

Good morning, What I'm trying to understand is the part of minimizing the functional present in HH91 ("On the nonlinear mapping of an ocean wave spectrum into a synthetic aperture radar image ...
0
votes
0answers
18 views

Programming integral to go from Image Scene to Light Field

below is the integral I am ultimately trying to program in python 3. To describe the integral, it takes an image scene's photon emission E(s,t,z) and converts it to 4D light field data that a camera ...
0
votes
0answers
59 views

Is it possible to change the location of a virtual image without using moving lenses?

The benefit of a head-up display is primarily in reducing the time required by the user to refocus their eyes from the head-down display to the head-up surroundings. In applications such as cars, the ...
0
votes
0answers
36 views

Does the recent picture of the black hole have a native resolution?

Can the resolution be measured in pixels? If so, what is the pixel resolution?
0
votes
1answer
73 views

What does the width of the 2D Fourier transform of a speckle pattern mean?

Speckle patterns can be studied by capturing an image of the speckle pattern produced on a rough surface when light from a laser passes through an aperture stop. When analysing this speckle pattern, ...
0
votes
1answer
14 views

What operation is used to construct single image of dual-energy x-ray scanned object?

I know that for dual-energy x-ray screening, two different energies are used which produces two distinct images. I want to know how these images are combined to result in a single image. I know that ...
0
votes
0answers
35 views

Defraction limits of muli-image super resolution for satellites

Is it possible to increase the resolution of satellite imagery with multiple passes through the use if multi-image super resolution algorithms? I would imagine that probably the optical systems are ...
0
votes
0answers
218 views

Measuring typical distance between patches using 2D Fourier Transform

I need to extract information about the typical distance between the black patches in an image like the one I attached here. I tried to perform 2D FFT on it (using OpenCF fdt function in Python), but ...