[Users] ridging attribute

[Geert de Bruin]

Dear all,

At the moment I am working on sequence stratigraphy (SSIS) and in order 
to detect particular features I constructed a simple ridging attribute 
(see example ftp://dgb-group.com/pub/tmp/Ridging_example.png). This 
attribute was originally a pre-calculation for a different attribute, 
but striking was the fact that it made the interpretation of structures 
easier, since I was not biased by the energy of events.
The attribute set is quite simple. Each sample is compared with one 
sample above and one sample below it. If it has a higher value than the 
sample below and above it, the sample is located on or near a positive 
peak. This sample is given a 1 as output, all others are made zero. The 
same can be done for negative peaks, consequently the sample must be 
smaller than the sample above and below it. It is possible to display 
only the positive or negative ridges, or to combine them into a new 
attribute.
See for ftp://dgb-group.com/pub/tmp/Ridging%20attribute.ppt complete 
explanation.

Best regards,

G. de Bruin

-- 
-- Geert de Bruin
-- Geoscientist
-- dGB Earth Sciences B.V.
-- Nijverheidstraat 11-2, 7511 JM Enschede, The Netherlands
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