Titre :
|
Simple, low-cost image analysis of soil pore structure
|
Auteurs :
|
E. Robertson ;
D. Campbell
|
Type de document :
|
article/chapitre/communication
|
Année de publication :
|
1997
|
Format :
|
p. 291-296
|
Langues:
|
= Anglais
|
Catégories :
|
SCIENCES FONDAMENTALES ET APPLIQUEES
|
Mots-clés:
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POROSITE
;
CONDITIONNEMENT D'ECHANTILLON
;
PHOTOGRAPHIE
;
IMAGERIE
;
MACROPOROSITE
;
SOL
|
Résumé :
|
A low-cost method to obtain and analyse digital images of prepared soil sample faces is described. Soil samples are stabilized and pore space is highlighted using a hard-setting resin. The sample faces are photographed using a 35 mm SLR camera fitted with a macro-lens and digital images of the negatives or slides are transferred on to Kodak Photo-CD. The images are analysed using custom-written software on a standard IBM-compatible PC. Various soil structural characteristics are evaluated that have previously required greater resources for evaluation. The method is illustrated with images of three contrasting soil compaction treatments from a field experiment and the results obtained are examined in relation to gas movement measurements.
|
Source :
|
Journal of Agricultural Engineering Research, vol.68
|