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Paul Lammertsma is a master student at Utrecht University's computer science department. At paul.luminos.nl, you can find articles about Game & Media Technology and general computer know-how.

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So long!

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Friday, March 9 2018, 1:48
Fifteen years ago, I was tinkering in PHP and hosted my first website on my desktop PC from my bedroom in my parents' house. Soon I had launched my own website in what would ultimately become my blog. It's funny how well I recall building on it and proudly launching updates and sharing it on my own little corner of the web.
How incredible to think how much has changed since then. From my university studies, to starting my own businesses, to falling in love and getting married. It hasn't all been fantastic; divorce, the loss of loved ones and the subsequent depression were difficult, but from it all I've learned so much.
Yet so much has stayed the same! Scrolling through my past, I see how my passion for technology and my yearning to develop myself has never faltered. Who knows which challenges I'll face next! The thought only excites me.
With this, I write my final post on this blog. I am, as always, active elsewhere on the web, primarily on my GitHub and Stack Overflow accounts.
Paul (and his loving kitties Gudan & Lotje), signing off. So long!
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Spam filter revised

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Thursday, September 19 2013, 20:53
It's been well over two years since I last maintained my blog, and spam had gotten the better of it. I rigorously reviewed my Naive Bayes implementation, and sure enough, spotted some bugs.
Now that the positive spam classifier is reset, all comments should trigger a Turing code challenge, which with some additional complexity now hopefully further discriminates humans from malicious web-crawling bots.
While back in 2005 it was fun and challenging to write my own spam filter, the open source community has since truly opened up, with magnitudes of great implementations. Now I just have my fingers crossed that my simple classifier dismays most of those spammers.
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Pixplicity website launched

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Monday, February 14 2011, 15:44
Over the past year, as we have been developing genetic software at CrimsonBase, my colleagues and I have been time and time again approached to use our expertise to develop Android apps.
Pixplicity logo
We're happy to announce our new venture, Pixplicity!
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vikas: Hi paul, I have also invested lot of...
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FaceSelector: facilitate annotating faces

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Monday, December 6 2010, 14:04
Looking for a customizable tool to annotate photographs of faces?
As part of my master, I needed to generate a data set with labeled facial features, including head_top, head_bottom, eye_left, eye_right, nose and mouth. I put together a simple Java SWT-based application that makes annotating photographs easy.
To get the source code compiled:
  1. Download and extract this ZIP
  2. Grab the latest SWT library from Eclipse.org and put swt.jar in the project's lib folder
  3. In Eclipse, create a project from existing source and specify the project directory
  4. Edit FaceSelector to specify the desired fields and path to the data set
That's it; you should be all set!
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TryAgain: new life for the age-old add-on

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Friday, August 20 2010, 19:17
TryAgain is a Firefox add-on that keeps trying to load a webpage when the server cannot be reached.
WiFi out of range? Reddit not responding? TryAgain is one of the first add-ons I add to a fresh installation of Firefox, because it's such a simple solution to a common annoyance.
The original version came in the form of a userscript back in April, 2006, soon replaced by a Firefox add-on with added functionality. As the years progressed, Mathijs (add-on caretaker) moved to Chrome, leaving reviewers complaining that it wouldn't work in the latest versions of Firefox.
Fear not! New life has come to TryAgain. I have taken the add-on upon myself as a hobby project, and have already added functionality some reviews asked for:
The version currently pending Mozilla review (3.3) doesn't include the last two features, but I assure you that as soon as it's published, I'll submit the next version.
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