I normally don’t promote external sites or apps on this blog, but I’ve found an app that every nerd needs (I assume here for a moment that you, my reader, might just as well be one). You need to have Phyphox on your phone! I need…
In this article, I list basic scripts to save and load images. As always, I’ve assumed that you want to use NumPy and SciPy for processing your data, and that you use floating point numbers for all processing and…
It turns out that each positive real number \(x\in\mathbb{R}^+\) can be written in the form \(x=1/a_1+1/a_1a_2+1/a_1a_2a_3+\cdots\), where \({a_1,a_2,a_3,\ldots}\) is a unique non-decreasing sequence, finite or infinite, of postive integers. This is called the Engel expansion of \(x\), after…
Each time I need to do something with audio, one dimensional signal processing in general, or images, I need to go through my collection of Python scripts to help me remember once again which library to use to save and load them. To make this easier…
After deciding that I’d like to automate a weekly tweet of one of my existing blog post, to keep you entertained a bit more now that my posting frequency has diminished lately, I started by googling the different tools and platforms that can be used to do that. However…
After 2020, 2021 was a another really quiet year on this blog, this time with a grand total of five articles posted… And, of those five articles, four were part of the tutorial Reconstruction of a Real Dataset. Although I do have to say that that tutorial took…
![Figure 1. Cherenkov radiation in the core of the Advanced Test Reactor [image: Argonne National Laboratory].](https://tomroelandts.com/sites/tomroelandts.com/files/styles/thumbnail/public/field/image/cherenkov-radiation.jpg "Figure 1. Cherenkov radiation in the core of the Advanced Test Reactor [image: Argonne National Laboratory].")
Cherenkov radiation is best know for the eerie blue glow in the water around the core of nuclear reactors. It was named after the Russian scientist Pavel Cherenkov, who received the 1958 Nobel Prize in Physics for its discovery. It is…
This is part four of a tutorial that describes how to create a reconstruction of a cone-beam computed tomography (CT) dataset. In this part, I’ll show how to create the actual reconstruction from the projections that were created in…
This is part three of a tutorial that describes how to create a reconstruction of a cone-beam computed tomography (CT) dataset. In this part, I’ll show how to convert the preprocessed images from part two into projections…
This is part two of a tutorial that describes how to create a reconstruction of a cone-beam computed tomography (CT) dataset. In this part, I’ll show how to preprocess the images to correct them for variations of the X-ray source intensity and…