The Volume Threshold control allows you to define the range of values displayed in a 3D volume, effectively filtering data based on intensity or attribute values.
Histogram & Threshold Adjustment
- The histogram at the top visualizes the relative distribution of values within the selected volume.
- The currently displayed range is highlighted, along with the set minimum and maximum values.
Adjusting the Threshold Range
- Modify the Min/Max values using the input fields.
- Alternatively, adjust the range slider:
- Move individual handles to modify the range.
- Drag the middle section to shift the range without changing its width.
- Click the Reset button to restore the range to the dataset’s full value span.
Invert Threshold
- When enabled, this hides values within the selected range and displays only those outside the range.
- Useful for emphasizing outliers or isolating specific features within the volume.
Using Threshold to Hide Volume
- Setting the threshold to hide all values effectively removes the 3D volume, which can be useful if you still want Volume Slices to remain visible.
- This can also easily be achieved by setting the threshold to cover the full range of values and activating Invert Threshold.
Volume rendered with no threshold filtering applied, using trilinear interpolation and isosurface rendering.
Volume rendered with threshold filtering applied, using trilinear interpolation and isosurface rendering.
Volume rendered with threshold filtering applied, using trilinear interpolation and direct volume rendering.
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