Questions tagged [image-processing]
The image-processing tag has no usage guidance.
18 questions with no upvoted or accepted answers
4
votes
0
answers
775
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).
...
- 41
4
votes
0
answers
418
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 ...
- 41
1
vote
0
answers
27
views
Replica calculation in statistical mechanics
i am reading "Statistical physics of spin glasses and information processing an introduction - Nishimori Hidetoshi", chapter 6, page 119 on image restoration. I tried to understand what ...
1
vote
1
answer
105
views
Is it possible to get a resolution that is better than what is given by the Rayleigh criterion?
I remember reading recently that it is possible to unblur a face that has been blurred by using a computer to process multiple images of the blurred face from different angles. This got me thinking, ...
- 111
1
vote
1
answer
2k
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 ...
- 67
1
vote
0
answers
170
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?
- 51
1
vote
0
answers
77
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 ...
- 239
0
votes
0
answers
24
views
Methods to measure the IR intensity light using the Spectrometer
I'm a undergraduate student. Our group of friends plan to measure the IR light source intensity. We have a idea to do this.
In a dark room we place a IR light source in opposite to that we place a ...
0
votes
0
answers
24
views
Simple interference confocal microscope
I have the two articles:
The first one: First article
and
The second one: Second article
After reading the first article I understood while reading that using the detector A we get confocal ...
0
votes
1
answer
26
views
How to decipher imaging method used in remote sensing images?
I am working on remote sensing for science olympiad (div c) and i am kind of lost on remote sensing image analysis. like how do i look at an image and know it was captured using infrared or microwave ...
0
votes
1
answer
221
views
What is the input of calculating signal noise ratio (SNR) and detective quantum efficiency (DQE) in estimation of imaging system?
In its definition, the signal noise ratio (SNR) is the ratio of the mean siganl to the standard deviation of the noise. However, for a given picture what is the noise? The detective quantum efficiency ...
- 31
0
votes
2
answers
478
views
How can one calculate the velocity of an object that appears as a blur?
Around how could you estimate the speed of an object which appears as a blur to the human eye? And by blur I mean to the extent it is hard to trace or make out. I looked this up but the best I could ...
- 227
0
votes
3
answers
410
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 ...
- 2,167
0
votes
0
answers
209
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 ...
- 2,402
0
votes
0
answers
39
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?
- 143
0
votes
1
answer
31
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
0
answers
63
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 ...
- 101
0
votes
0
answers
293
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 ...
- 133