The seminar of the team Labo is under the responsibility of
Michel Raibaut.

**Settings:**
See
with decreasing date.
Hide abstracts

Other years: 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018,
all years together.

# Year 2003

**Thursday 13th November 2003 at 17h
**
Y. Yomdin
(Wiezmann Institute),
*Ridge detection, Differential Geometry, and stability of high-order Image Processing.*

Abstract:(Hide abstracts)

Ridges are bright lines on a dark background (or dark lines on a bright background). An accurate mathematical definition of ridges presents some difficulties (arising also in other similar problems):

there are several intuitively justified definitions which are not equivalent mathematically and which lead to quite different results in practice.

We discuss a "differential-geometric" definition of ridges and compare it with some other possible definitions. Then we describe a stable high order numerical algorithm for ridge detection.

The seminar of the team Labo is under the responsibility of
Michel Raibaut.

**Settings:**
See
with decreasing date.
Hide abstracts

Other years: 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018,
all years together.