The Black Top Hat function applied to a DEM: A tool to estimate recent incision in a mountainous watershed (Estibère Watershed, Central Pyrenees)

Abstract : The Top Hat Transform function is a grey-level image analysis tool that allows extracting peaks and valleys in a non-uniform background. This function can be applied onto a grey-level Digital Elevation Model (DEM). It is herein applied to quantify the volume of recent incised material in a mountainous Pyrenean watershed. Grey-level Closing operation applied to the Present-Day DEM gives a new image called ''paleo'' DEM. The Black Top Hat function consists in the subtraction of the ''paleo'' DEM with the Present-Day DEM. It gives a new DEM representing all valleys whose sizes range between the size of the structuring element and the null value as no threshold is used. The calculation of the incised volume is directly derived from the subtraction between the two DEM's. The geological significance of the quantitative results is discussed.
Document type :
Journal articles
Complete list of metadatas

Cited literature [11 references]  Display  Hide  Download

https://hal-univ-tlse2.archives-ouvertes.fr/hal-01367706
Contributor : Emilie Gil <>
Submitted on : Friday, September 16, 2016 - 3:33:02 PM
Last modification on : Monday, October 28, 2019 - 3:16:03 PM
Long-term archiving on : Saturday, December 17, 2016 - 1:40:23 PM

File

GRL_2002_cor.pdf
Explicit agreement for this submission

Identifiers

Collections

Citation

Felipe Rodriguez, Éric Maire, Pierre Courjault-Radé, José Darrozes. The Black Top Hat function applied to a DEM: A tool to estimate recent incision in a mountainous watershed (Estibère Watershed, Central Pyrenees). Geophysical Research Letters, American Geophysical Union, 2002, 29 (6), 4 p. ⟨10.1029/2001GL014412⟩. ⟨hal-01367706⟩

Share

Metrics

Record views

408

Files downloads

470