The Hough transform is used in digital image processing and computer vision to find geometrical shapes such as lines, circles or ellipses, common in images that contain man-made objects. The Hough transform can be used after an image has been pre-processed by an edge detector to find the edges that reveal the border of objects or regions inside it. In this post I will introduce briefly the theory behind the Hough transform, and then I will present two examples , one with images containing simple geometrical shapes, to better explain the idea, and one with an image containing man-made objects…
How to create an animation in Python using a Jupyter notebook and the forecasts from the Copernicus Atmosphere Monitoring Service
During a pandemic the air quality might not be seen as the most pressing issue but, according to the World Health Organization (WHO), air pollution kills an estimated 7 million people world wide every year. If we wonder what might be the situation in Europe, the European Environment Agency (EEA) would inform us that in 2018 nearly 379000 premature deaths were attributable to particulate matter (PM2.5) and 54000 to NO2. The WHO has established some guidelines on the quantity of certain pollutants above which an impact on the health of the population is expected. For example PM2.5 should not exceed…
The purpose of this post is to explain how to communicate privately over the Internet using public-key cryptography and how to digitally sign a document.
Introduction
Being able to communicate privately is a civil right and often a business need. As we can not allow anyone to eavesdrop our communications, we have also the right to avoid surveillance by companies or governments. There are many tools and protocols, many being open source and free, that can be used to enhance the security of our communications over the Internet. The aim of this post is to provide a very high level description…
Luigi Selmi
I am a project leader and senior software engineer at Fraunhofer IAIS
