Threshold (Threshold)
This filter extracts cells that have point or cell scalars in the specified range.
The Threshold filter extracts the portions of the input dataset whose scalars lie within the specified range. This filter operates on either point-centered or cell-centered data. This filter operates on any type of dataset and produces unstructured grid output.



To select between these two options, select either Point Data or Cell Data from the Attribute Mode menu. Once the Attribute Mode has been selected, choose the scalar array from which to threshold the data from the Scalars menu. The Lower Threshold and Upper Threshold sliders determine the range of the scalars to retain in the output. The All Scalars check box only takes effect when the Attribute Mode is set to Point Data. If the All Scalars option is checked, then a cell will only be passed to the output if the scalar values of all of its points lie within the range indicated by the Lower Threshold and Upper Threshold sliders. If unchecked, then a cell will be added to the output if the specified scalar value for any of its points is within the chosen range.

PropertyDescriptionDefault Value(s)Restrictions
All Scalars
(AllScalars)
If the value of this property is 1, then a cell is only included in the output if the value of the selected array for all its points is within the threshold. This is only relevant when thresholding by a point-centered array. 1

Only the values 0 and 1 are accepted.

 
Input
(Input)
This property specifies the input to the Threshold filter.  

The selected object must be the result of the following: sources (includes readers), filters.

The dataset must contain a point or cell array with 1 components.

The selected dataset must be one of the following types (or a subclass of one of them): vtkDataSet.

 
Scalars
(SelectInputScalars)
The value of this property contains the name of the scalar array from which to perform thresholding.  

An array of scalars is required.

Valud array names will be chosen from point and cell data.

 
Threshold Range
(ThresholdBetween)
The values of this property specify the upper and lower bounds of the thresholding operation. 0 0

The value must lie within the range of the selected data array.