Let’s code with ChatGPT
Background So, everyone has heard about the almighty chat GPT. It started with Dall-E in 2022 and a little later, in July, we got “Mid Journey” and then a bit later still “Stable Diffusion”. The…
Category: Programming
Let’s talk about ChatGPT the Alien
I’ve been talking to ChatGPT since November last year, you’ve probably heard of it. So, during my experiments I started to think more about the ramifications of AI and how it will change our lives.…
Project: Photo Mosaic Renderer and Viewer
Mosaic demo Usage: First, click on a button to load that scene. On a PC: translate= wasd, zoom in = e, zoom out = f, reset zoom = z, zoom in = left MB (hold),…
Starting with ThreeJS
This is a first post about my endevors delving into the world of Javascript and ThreeJS. It is a ‘hello world’ to both javascript and ThreeJS. In this post I will show how to create…
Advent of Code 2016
For the impatient: jump to versions of my code: final version second version first version So, I was introduced to this website called “Advent of Code” http://adventofcode.com just the other day, it’s pretty cool. The…
Gavle Goat is on Fire!
Yay! The old goat caught on fire today, happy days (for me). According to the webcam time, the goat was set ablaze some time between 03:13:24-03:13:30, because the webcam is updated every five seconds. Let…
Enhancing Image Quality of Thermal Images (Seek)
As you may know, I recently bought the ”Seek Thermal Camera” for my smartphone. It works great, but the images I take are blurry and quite noisy. In this post I will try to sharpen…
Enhancing Spy Camera Photos of Documents
This post is about how you can processed a photo (spy photo) of a document using rectification and moving average thresholding in Matlab. The Problem We have all been in the situation where we wish…
Smoothing a Halftone Photo using FFT
In this post I will show how to smooth a halftone image using the fast Fourier Transform (FFT). You can try this out yourself by downloading my Matlab code on the bottom of the article.…
Reducing VHS Salt-and-Pepper Noise
As I was watching a magician’s lecture from 1985 of the magician Tommy Wonder (stage name of Jacobus Maria Bemelman), I immediately noticed the distracting noise in the video. It looked like salt-and-pepper noise, but…
Deconstructing the Gavle Goat
In Sweden we have this weird Yule goat made from straw that is erected each year just before 1st of December for people to look at. In the late nineties they even put up a…
How to train your Quadcopter
I have not seen “How to train your dragon”, but I have heard about it. Anyway, this post is not about dragons but the next best thing, quadcopters! Sure, a quadcopter can’t expel fire from…
Approximating pi using Apples
In this post I will look at a new variant of an old way of approximating pi using random numbers, a so-called “Monte Carlo” method. Yes, Monte Carlo as in the casino. There is another…
Look and Say Sequence (Conway’s constant)
I just took a look at John Conway’s video at Numberphile about the “look-and-say” sequence or as Conway called it “The Weird and Wonderful Chemistry of Audioactive Decay”. He did a lot of research on…
CSV Parsing in Matlab
A couple of weeks ago I needed to parse the gmail contacts of my local magician’s club (GMK – Göteborgs Magiska Klubb) of which I belong to. My task was to create a neat list…
Copy Files to Multiple USB Drives
The other day I had to copy a couple of HTML and PDF files to 30 USB thumb drives. To make this as efficient as possible, I found a way to do this using (Perl…
Finding the Taxi Cab Numbers
This post is about “Taxi cab numbers” specifically the “Ramanujan-Hardy number”, 1729. This specific taxi cab number is so-called because it is the smallest positive number that can be written as a sum of two…
Realistic Fire Simulation using Cellular Automata
In this post I will explain how you can create an interesting fire effect using simple “game of life”-like rules and some post processing and why it is not a good idea to do this…
Prezi vs Sozi
Sozi is an Inkscape extension enabling the user to create Prezi-like presentations with the rotating and zooming animations and bells and whistles that we all love. The great thing with Sozi is that it creates…
Faster Linear Convolution Using Careful Zero Padding
When computing a linear convolution between an image I and a kernel K, the convention is to use FFT, pad with zeroes (also called zero filling) and use the convolution theorem to do this efficiently.…
Double-Slit Experiment Simulation
This post is about simulating the double-slit experiment using a water tank simulation in Matlab. The simulation is really used to create a rain drop animation, but I modified it slightly to do the double-slit…
Beveled Cube from a Sphere
This post is about how one can map a sphere to a “rounded”, “smoothed” or as I prefer to call it a “beveled” cube. We will as a bonus also see how to make a…
How to create Valentine Bunnies in Game of Life
Game of Life is a very interesting and a surprisingly simple algorithm invented by John Horton Conway in the seventies. The game is for 0 players, because it is really not a game in the…
Fast Fourier Transform of a zero vector
This is a short post about FFT of zero vectors and as a result show why FFTW does not check if the argument is a zero vector. I could argue that zero vectors are a…
Taxi Company Dispatch Simulation
As a part of the course in “Simulation of Complex Systems” I suggested a project. The project was to simulate the dispatch system of a taxi cab company. The goal was to essentially simulate where…
Wave propagation using vertical springs
This is a simple MATLAB code I created which simulates the way a wave propagates through a medium. I wanted to simulate the wave machine created by John N. Shive at Bell Telephone laboratories. The…
Block Chromatic Noise
I love photography and image processing and this little project, that I wish to share with you, I finished way back in April 2012. I recently found this in my old dropbox account and thought…
Faro Shuffle retention
This post is about faro shuffles. A Faro shuffle is a perfect riffle shuffle of two halves of a deck of cards so that each card from each half is interlaced perfectly. There are two…
