Following the extension of the family, we decided to buy a new and bigger car, and hence to sell the old one (an Audi A3 sportsback). There exists online ressources to evaluate the price of used cars on the market (Eurotax for the Swiss market) but the car was too old to be listed (over […]
A difference spotter algorithm
A popular game consists of finding the differences between 2 images. In this project we develop an application to do it automatically, using computer vision tools in Python (OpenCV and Scikit-image). Introduction In this first post, we build the main algorithm: i.e. finding the differences between two perfectly aligned images and displaying the result. The […]
AI to automate the classification of NOTAMs
Flying today is safer than ever, thanks in part to the high standards of communication between the parties. One communication system is called “NOtice To AirMen” (NOTAM) and consists of short text messages broadcast by airspace officials to warn pilots of anticipated events that may disrupt flight en route (closed runways, construction work, closed airspace, […]
Research activities
Papers: Google Scholar, ADS Academic CV Ph.D. thesis [in French] When working in academia, I was interested in observational Cosmology to study the fluctuations of Dark Matter as function of space and time, as a tool to unveil the nature of the enigmatic components of the Universe. My field of research was focused on the […]
Venice
venice is a mask utility program that reads a mask file (DS9 or fits type) and a catalogue of objects to: create a pixelized mask, find objects inside/outside a mask, or generate a random catalogue of objects inside/outside a mask. The program reads the mask file and checks if a point, giving its coordinates, is […]
The bright-star masks for HSC-SSP
The bash scripts and Python code to build the masks are available on GitHub. The masks to flag objects in the HSC-SSP area can be found here. The archive contains the masks and tools to flag objects potentially affected by a nearby star in the HSC-SSP footprint, as illustrated below: (Y-band image from the PDR1. […]
Thèse de doctorat
Download the full text here [in french]. Title: High redshift galaxies : measurements and cosmological constraints This thesis focuses on the measure of galaxy redshifts and their cosmological applications. This work is conducted within the context of the standard cosmological model, for which we explain the principle as well as its limitations. In particular […]
CFHTLenS Multiband data
Data catalogues (photo-z, lensing and PDFs) from Coupon et al. (2015) can be found here.
Backing up TB’s of data on Mac OS X
The problem I recently had to increase my disk storage capacity and I took this opportunity to completely revise my backup strategy. I used to only rely on Apple’s Time Machine using one (big) disk located right next to my computer, but it turns out not to be sufficient for a totally handy and secure […]
Super W Of Theta (SWOT)
SWOT is a code to compute two-point statistics for very large data sets, based on “divide and conquer” algorithms, mainly, but not limited to: data storage in binary trees, approximation at large scale, parellelization (open MPI), bootstrap and jackknife resampling methods “on the fly”. It currently supports projected and 3D galaxy auto and cross correlations […]