DICOM PS3.3 2018b - Information Object Definitions

C.11.27.2 Classification Component Usage
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#### C.11.27.2 Classification Component Usage

If Pixel Presentation (0008,9205) is TRUE_COLOR, the Presentation State Classification Component Sequence (0070,1801) defines the transformations of processed VPS inputs into RGB data streams, a process known as "classification".

Each Item of Presentation State Classification Component Sequence (0070,1801) describes one "classification component" in the Volumetric Presentation State Display Pipeline, as described in Section FF.2.3.2.1 “Classification Component Components” in PS3.4. At least one Item is required in order for the Presentation State to generate a PCS-Value output. If there is more than one Item in this Sequence, the outputs of the multiple classification components are composited as described in Section C.11.27.3 “Compositor Component Usage”.

Two types of classification components are defined:

- Component Type (0070,1802) value of ONE_TO_RGBA specifies that of one processed input value is transformed into the RGBA output value

- Component Type (0070,1802) value of TWO_TO_RGBA specifies that of two processed input values are transformed into the RGBA output value.

The internal structure of each classification component is described in Section FF.2.3.3 “Internal Structure of Components” in PS3.4.

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DICOM PS3.3 2018b - Information Object Definitions