Post on 17-Dec-2015
How to Visualize in OpendTect
Layers and Transparency, Volume Rendering & Iso surfaces
Geert de Bruin
Introduction
OpendTect is a powerful tool for attribute analysis and advanced object detection
Visualizing the results is almost as important as the results themselves, therefore OpendTect has several advanced visualization options
This presentation helps you to get best out of OpendTect: layers, transparency, color-bars, volume rendering and iso surfaces
Overview
Working with attribute layers and transparency
Visualizing data in 3D: Volume rendering
Iso-surfaces (prototype)
Working with attribute layers
In OpendTect one element (inline, crossline, time-slice, horizon, random-line) can have multiple attribute displays or layersThe attribute on layer 2 is
masking the seismic data on layer 1. Therefore we make the second layer (partially) transparent
Layer 1: Seismic data
Layer 2: Attribute
1) Uniform transparency2) Part transparent /
part opaque
Part transparent / part opaque
The concept is to make a certain value-domain completely transparent (low attribute values), while keeping the other values opaque (high attribute values).
Workflow in OpendTect
1) Display seismic data
2) Right click on the element and select “add attribute”
Workflow in OpendTect
Tip: Shift + Arrow Up/Down To changes the order
1) Display seismic data
2) Right click on the element and select “add attribute”
3) Display an attribute on the new layer
4) Select the layer and choose the color-bar “chimney”
Workflow in OpendTect
Right click on the color-bar to flip or edit it
http://www2.opendtect.org/rel/html/index.html
Consult OpendTect user-documentation
Uniform transparency
Uniform transparency is equally simple to perform
Uniform transparency
Layer 1 Seismic Data
Uniform transparency
Layer 1 Seismic Data
Layer 2 Acoustic impedance
Uniform transparency
Uniform transparency
Overview
Working with attribute layers and transparency
Visualizing data in 3D: Volume rendering
Iso-surfaces (prototype)
Visualizing data in 3D: Volume rendering
Display an attribute in a volume viewer. Make a certain value-domain completely transparent (low attribute values), while keeping the other values opaque (high attribute values).
Volume rendering
1) Add a volume and position it
1) Add a volume and position it
2) Load the attribute
3) Deselect “inline crossline and time” & select “volren”
1) Add a volume and position it
2) Load the attribute
3) Deselect “inline crossline and time” & select “volren”
4) Choose a color-bar with transparency (Chimney)
Overview
Working with attribute layers and transparency
Visualizing data in 3D: Volume rendering
Iso-surfaces (prototype)
Iso surface
1) Add a volume and load the attribute data
2) Right click in the volume item in the tree and select Add> Iso surface
The color of the isosurface corresponds to the color in the color bar at the value of the isosurface (ignoring transparency)
Changing the iso value will thus result in a different color and shape
Iso surface: ChimneyCube