The way to change the world…
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Educate-Inspire-Change
Empty Suit
Definition: An amateur who's been given the power to set the goals & objectives for professionals to follow, and thinks of himself as a strong leader.Ethics
"Veritas vos liberabit"
"It's better to build something 100 people love, than something that 1M people kind-of-like" -- Brian Chesky
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“The mediocre teacher tells. The good teacher explains. The superior teacher demonstrates. The great teacher inspires.” ― William Arthur Ward
When the facts change, I change my mind. What do you do, sir?" -- John Maynard Keynes
""Don't attribute to stupidity what can be adequately explained by a contract." -- Anonymous
"Without deviations from the norm, progress is not possible" -- Frank Zappa
"I must study politics and war that my sons may have liberty to study mathematics and philosophy and they in turn must study those subjects so that their children can study painting, poetry, music, architecture, statuary, tapestry, and porcelain." -- John Adams, Americas II president
"In a time of universal deceit - telling the truth is a revolutionary act." -- George Orwell
"The only thing necessary for the triumph of evil is for good men to do nothing." -- Edmund Burke
"Being normal is being merely average" -- Shawn Achor
“It is difficult to get a man to understand something, when his salary depends on his not understanding it.” -- Upton Sinclair
"I do not agree with what you have to say, but I'll defend to the death your right to say it." -- VoltaireSystems view
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Tag Archives: programming
Machine Learning with PyBrain
Looks very impressive, a comprehensive library for machine learning using Python.
Facial detection using OpenCV & Python on Windows7-Cygwin64
Finally! As described in my previous post, I had some struggle getting OpenCV to run at all under my Windows7 / Cygwin64 installation, but eventually I managed getting it working for C++. However, Python still refused to cooperate with OpenCV, … Continue reading
Posted in development, software
Tagged image processing, OpenCV, programming, Python
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Python image processing – object recognition
When looking for a function enabling me to do normalized cross correlation of images, for purposes of object recognition, I stumbled upon an extension to the SciPy library: SciKit-image. After a few minutes of browsing that site I was able … Continue reading
image processing – convolution explained.
The Python code below demonstrates convolution. First, using Scipy’s convolve() function, then by two – far from optimal, far from high performance! – ‘invented-here’ implementations of convolve(), that I hacked in order to understand what Scipy’s convolve() actually does. The … Continue reading
Image processing with Python, Numpy & Scipy – image convolution
I spent a few hours tonight learning the basics of image processing. In particular, I wanted to understand convolution, that is, a techique for applying various types of filters to images. I’m not going to cover all the nitty gritty … Continue reading
Simple image processing with Python, Numpy & Matplotlib
When I saw the topmost image on the Russian riot police, I just had to do a simple image transformation, more specifically, a reflection, to produce a mirror image. Numpy’s powerful functions makes such a tranformation very simple. import … Continue reading
Optimization: 100x performance boost (even without DevOps!) :-)
(First of all, apologies for the mention of ‘DevOps’ above:this post has, as far as I can tell – since I really don’t know what DevOps is, haven’t found any place where to download it… – nothing what so ever … Continue reading
Posted in development, Math, software
Tagged Big Data, Math, Optimization, performance, programming, Python, software
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Single simulation run consuming 230 h (!) of cpu-time – root cause analysis of performance
I think I’ve broken some kind of record of CPU-time consumption for a single simulation run… for a fairly trivial application… As my frequent readers know, I’ve been playing lately with a simulation of Shelling’s segration model (see previous posts … Continue reading
Posted in Big Data, development, software
Tagged HPC, Optimization, programming, Python, Simulation
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High Performance Computing with Python…!
This seems very very interesting: HPC with Python…! Thinking about giving it a try.
There’s a bug in my program: The enormous difference between < and <=
I’ve found a bug in my program! A bug, in my program…! And I’m a pro hacker, how shameful…! 🙂 Scary, isn’t it… a simple bug, a single character among the thousands of characters in my program… that single character … Continue reading
