Volume Rendering with Uncertainty Information


This paper explores two general methods for incorporating volumetric uncertainty information in direct volume rendering. The goal is to produce volume rendered images that depict regions of high (or low) uncertainty in the data. The first method involves incorporating the uncertainty information directly into the volume rendering equation. The second method involves post-processing information of volume rendered images to composite uncertainty information. We present some initial findings on what mappings provide qualitatively satisfactory results and what mappings do not. Results are considered satisfactory if the user can identify regions of high or low uncertainty in the rendered image. We also discuss the advantages and disadvantages of both approaches.



Inline Method

1D Transfer Function

Uncertainty Thresholding

mean salinity uncertainty > 0.2 uncertainty > 0.5

Increasing Opacity

transfer function (lower contrast) mean salinity mean temperature

transfer function (higher contrast) mean salinity mean temperature

2D Transfer Function

histogram of mean salinity data

2D transfer function for salinity constant opacity increasing opacity

2D transfer function for salninity constant opacity increasing opacity

Post-Processing method:

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