Dr. Lex' Informative Section
This page contains some topics that could be classified as “educative”. Sometimes I notice many people do not know much about a certain topic, or have wrong ideas about it. Or, people ask me the same questions over and over. I will then try to point them to a good webpage that explains the topic. Obviously if there is no such webpage, my only option is to write it myself. This has resulted in the following collection of articles. Most of these topics are related to the internet and multimedia.
For very small articles or short notes I created a blog as well. Often I will also create a short post to announce an article, feel free to use those announcement posts to comment on the article.
- Programming volume controls
This text explains why the volume controls in a lot of software applications are a pain in the ass to work with, and how to implement a good volume control. Also a short part about frequency controls and analysis. A must-read for audio programmers!
- Video Bitrate Calculator
This calculator can be helpful to determine what bitrates to use when encoding video files.
- Tips for Encoding Videos
A buch of short hints on how to make good conversions of existing videos, with a specific focus on how to do it in HandBrake.
- Why aren't All Songs Recorded at the Same Loudness and What is Wrong With Music Nowadays?
This text explains why music has steadily become more annoying to listen to since 1990, due to a phenomenon commonly called the “Loudness Wars”.
- Making HDR Photos with Luminance HDR
This is a short explanation of how it is possible to obtain very neat-looking high dynamic range photos from even a relatively cheap compact camera.
- Why ‘3D’ Will Fail… Again
By the time you're reading this, the general public may already be scoffing at the ‘3D’ hype that started around the year 2009. This text explains why, and why I believe there will likely never be perfect 3D cinema.
- Just how useful is 2160p aka 4K?
Another digital cinema conundrum: should you upgrade your television or projector to 4K resolution? You may want to read this article before you start spending your hard-earned money.
- Media Formats Explained
This page attempts to shed some light on the difference between multimedia formats, codecs, media players, ... because many people appear to have trouble differentiating between these concepts.
- How I Rate Movies
This is actually just a cheat sheet for myself to remind me how to decide what score I should give when rating a movie on IMDb's 10-star scale. But it would of course be nice if everyone would use the same rating scale.
- QTVR Panoramas
Some QuickTime VR Panoramas I made, from various subjects like real-world scenes, synthetic graphics and computer games.
- How does a QTVR panorama work?
Basic + more detailed information about the aspects behind (cylindrical) QTVR panoramas.
- How to make a QTVR panorama
A step-by-step manual on how to create a panorama yourself. The information about software is dated, but the general principles are still applicable.
- How to make a QTVR object
A step-by-step manual on how to create a QTVR object yourself. Again, software info has become rather obsolete.
- These are the publications I made during my academic career. Most of them are about object category recognition.
- 3D Printing with the FlashForge Creator Pro and Slic3r
This article describes how to get started with Slic3r in combination with the FlashForge Creator Pro, and provides ready-to-use configurations and some general tips to improve your 3D prints.
- (Near) Perfect Dualstrusions with the FlashForge Creator Pro and Slic3r
A companion to the above article, it provides a script and instructions to get pretty good dual extrusion prints with Slic3r and a printer similar to the FlashForge Creator Pro.
- Why Some 3D Printing Filament Comes Pre-tangled from the Factory
After again giving in to the temptation to buy cheaper filament, I got another horrible jam and a failed print. In this article I try to explain the root cause and explain how a roll of poorly wrapped filament can be made safe for printing.
- Euro Exchange Calculator
A simple calculator which converts between the 12 obsolete currencies whose rate relative to the Euro has been fixed.
- Digital Information Sizes Calculator
A calculator which converts between SI units for file sizes (e.g. kilobytes) and IEC units (e.g. kibibytes), plus an explanation of the difference between them.
- Werkwoorden Vervoegen
(Dutch only). Deze pagina probeert op een duidelijke manier uit te leggen hoe werkwoorden te vervoegen in het Nederlands en de beruchte ‘dt-fouten’ te vermijden.
- Basic Punctuation
I could only receive that much e-mails with horrible punctuation, before I was no longer able to resist the urge to write this page, so here it is. Five simple rules than can turn a horrible uninviting lump of text into something that will not immediately scare away potential readers.