Accurate Eye Center Location through Invariant Isocentric Patterns

Below, is a Python implementation of the paper Accurate Eye Center Location through Invariant Isocentric Patterns. Most of the comments in the code are copied directly from the paper. Download: https://gist.github.com/dimitrs/d667ccb433d5f2baa8df This file contains...

Read More

Mixing OpenCV and SciKit-image

I saw a Mathematica post that described how to detect and flatten a label on a jar. My goal here is to do something similar in Python. I am familiar with OpenCV-Python which is what I have always used for my computer vision projects, but it occurred to me that there is no reason why I should only use OpenCV-Python. I could use both OpenCV-Python and...

Read More

VM Images for Windows, Android, and OS X

If you need to test your source code on multiple platforms, you will probably end-up using one or more virtual machines. I test my code on five different operating systems. I have an Ubuntu development machine, on which I have virtual machines for Windows 7, Android, and OS X Maverick (with the iOS simulator). These are all readily available...

Read More

How-to Install OpenCV on an Android VM

Installing an Android emulator on Ubuntu is actually quite easy. Below, are the steps I took to get OpenCV 2.4.5 working on a Android emulator installed on my Ubuntu 12.04 machine. Most guides I have read assume that you are going to be using Eclipse. I don't use Eclipse. 1) Install the JDK and ant.  :~$ sudo apt-get install openjdk-6-jdk...

Read More

Implement Data Parallelism on a GPU Directly in C++

Download: https://github.com/dimitrs/cpp-opencl The cpp-opencl project provides a way to make programming GPUs easy for the developer. It allows you to implement data parallelism on a GPU directly in C++ instead of using OpenCL. See the example below. The code in the parallel_for_each lambda function is executed on the GPU, and all the rest...

Read More

Writing OpenCL Kernels in C++

Download: https://github.com/dimitrs/cpp-opencl/tree/first_blog_post In this post I would like to present my C++ to OpenCL C source transformation tool. Source code written in the OpenCL C language can now be written in C++ instead (even C++11). It is even possible to execute some of the C++ standard libraries on the GPU. The tool compiles...

Read More

C++ Generic Programming: Implementing Runga-kutta

Download: https://github.com/dimitrs/odes Below, listing 1. is an implementation of a generic algorithm – the Runga-kutta method which is well known for its use in the approximation of solutions of ordinary differential equations. Although the Runga-kutta method is well known and relatively simple, the generic algorithm implementation below...

Read More