Tag Archives: image processing

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

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Making opencv work on WIndows7 Cygwin 64-bit : 7 hour’s of painful trial & error

Continuing my exploration of image processing, I found opencv. The examples given there are impressive. So, I decided to install opencv. Im running 64-bit Windows7, and since I’m a grumpy old man, I don’t run Visual Studio, Eclipse or any … Continue reading

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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

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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

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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

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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

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