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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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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
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"In a time of universal deceit - telling the truth is a revolutionary act." -- George Orwell
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“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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- Image processing with Python, Numpy & Scipy - image convolution
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- Making opencv work on WIndows7 Cygwin 64-bit : 7 hour's of painful trial & error
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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
