Science

sepdek March 14, 2014

A straightforward approach to do geometric image transformations using MATLAB is to take advantage of the imtransform function available. First the image is supposed to be within a ‘unity’ rectangle and initial transformation conditions are defined accordingly: udata = [0 1]; vdata = [0 1]; fill_color = 128; org_rect = [0 0;1 0;1 1;0 1]; […]

sepdek February 16, 2014

Recently I read an interesting book “The Grand Design” by Stephen Hawking and Leonard Mlodinow. Somewhere at the end of the book there was a reference to the well known game of life by John Conway (1970). Although I knew it was implemented by various researchers and is already available in MATLAB with a demo […]

sepdek February 10, 2014

In a recently posted question @StackOverflow a user asked how to find the maximum Euclidean distance in a binary image produced by Canny edge detection using MATLAB. The original post is here. I report my response here just for archival purposes. Provided that you have a binary edge image, you need to think of white […]

sepdek December 30, 2013

Just a few days ago I run into a very interesting image processing challenge at StackOverflow. The challenge focused on the detection of a christmas tree in an image (see here for more info). Since I had a some free time I though I could give it a try… The rules in this challenge were […]

sepdek August 23, 2012

Free will has long been an issue on my mind. Although I am not into psychology or neuroscience I approached it in a logical/abstract way. It became apparent to me that there is no such thing as ‘free will’. The manifestations of our thoughts, our actions, which we tend to base upon free will, seem […]

sepdek July 10, 2011

Just came back from the summer school Autonomous Micro Aerial Vehicles: Design, Perception, and Control held at ATH Zurich and organized by the EC FP7 project “sFly” (FP7-231855). A great experience and a chance to meet people and take a look at what is the state-of-the-art in small flying robots. With very important speakers like […]

sepdek April 8, 2011

This is how kids can do electrical circuits just by playing with dough. Here it is… the squishy circuits project page, with recipes of conductive and insulating dough along with example circuits and project videos.

sepdek April 2, 2011

Just returned from my first TEDx Thessaloniki event (although a regular online visitor to TED). The event’s site is here. Have you ever wondered why not? then you are probably a TEDx-ster. This is what TEDx Thessaloniki was about. The event was held at the Olympion Cinema at the center of Thessaloniki (Aristotle Square) and […]