Threshold Type Attribute
| Tag | (0070,1B13) |
|---|---|
| Type | Required (1) |
| Keyword | ThresholdType |
| Value Multiplicity | 1 |
| Value Representation | Code String (CS) |
Type of threshold comparison used to determine the presence of a pixel value in the output.
See Section C.11.33.1.2.1.
Section C.11.33.1.2.1
C.11.33.1.2.1 Threshold
The Threshold Type (0070,1B13) defines the pixel values that will be shown. Values that are not inside any of the specified Threshold Sequence (0070,1B11) Items shall be treated as padding pixels.
To describe a threshold that consists of more than one range, multiple Items are specified in the Threshold Sequence (0070,1B11) Items.
When more than one Item is specified in the Threshold Sequence (0070,1B11) the pixel shall be shown if any Item specifies that the pixel shall be shown.
The number of Items in the Threshold Value Sequence (0070,1B12) and the use of Threshold Value (0070,1B14) depends on the value of the Threshold Type (0070,1B13) as follows:
Enumerated Values for Threshold Type (0070,1B13):
- RANGE_INCL
-
A pixel value shall be shown when the value lies between the specified values or is equal to one of the specified values.
- RANGE_EXCL
-
A pixel value shall be shown when the value lies outside (i.e. not between) the specified values.
- GREATER_OR_EQUAL
-
A pixel value shall be shown when the value is greater than or equal to the specified value.
- LESS_OR_EQUAL
-
A pixel value shall be shown when the value is less than or equal to the specified value.
- GREATER_THAN
-
A pixel value shall be shown when the value is greater than the specified value.
- LESS_THAN
-
A pixel value shall be shown when the value is less than the specified value.