DICOM PS3.17 2018b - Explanatory Information

XXX.6 Usage of the Classification and Compositing Components
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## XXX.6 Usage of the Classification and Compositing Components

With these components, blending operations such as the following are possible:

- One input to P-Values output:

  - Pixel Presentation (0008,9205) has a value of MONOCHROME

  Figure XXX.6-1. One Input To P-Values Output

- One input to PCS-Values output:

  - Pixel Presentation (0008,9205) has a value of TRUE_COLOR

  - One Input -> RGBA component (Component Type (0070,1802) = ONE_TO_RGBA)

  Figure XXX.6-2. One Input to PCS-Values Output

- Two inputs to PCS-Values output:

  - Pixel Presentation (0008,9205) has a value of TRUE_COLOR

  - Presentation State Classification Component Sequence (0070,1801) has two items:

    - One Input -> RGBA component (Component Type (0070,1802) = ONE_TO_RGBA)

    - One Input -> RGBA component (Component Type (0070,1802) = ONE_TO_RGBA)

  - Presentation State Compositor Component Sequence (0070,1805) has one item:

    - RGB Compositor component

  Figure XXX.6-3. Two Inputs to PCS-Values Output

- Three inputs to PCS-Values output:

  - Pixel Presentation (0008,9205) has a value of TRUE_COLOR

  - Presentation State Classification Component Sequence (0070,1801) has three items:

    - One Input -> RGBA component (Component Type (0070,1802) = ONE_TO_RGBA)

    - One Input -> RGBA component (Component Type (0070,1802) = ONE_TO_RGBA)

    - One Input -> RGBA component (Component Type (0070,1802) = ONE_TO_RGBA)

  - Presentation State Compositor Component Sequence (0070,1805) has two items:

    - RGB Compositor component that combines the outputs of the first two classification components into one RGB

    - RGB Compositor component that combines the outputs of the previous RGB Compositor and the third classification component into one RGB. This RGB Compositor internally sets the missing Alpha to (1 - Alpha-3) since there is no Alpha output from the previous RGB Compositor

  Figure XXX.6-4. Three Inputs to PCS-Values Output

- The Volumetric Presentation State Display Module provides functionality equivalent to the Enhanced Blending and Display Pipeline defined in Section C.7.6.23 “Enhanced Palette Color Lookup Table Module” in PS3.3:

  - For P-Value output:

    - Pixel Presentation (0008,9205) has a value of MONOCHROME

    - Presentation LUT Shape (2050,0020) is present

    Figure XXX.6-5. VPS Display Pipeline Equivalent to the Enhanced Blending and Display Pipeline for P-Values

  - For PCS-Value output:

    - Pixel Presentation (0008,9205) has a value of TRUE_COLOR

    - Presentation State Classification Component Sequence (0070,1801) has two items:

      - One Input -> RGBA component (Component Type (0070,1802) = ONE_TO_RGBA)

      - Two Input -> RGBA component (Component Type (0070,1802) = TWO_TO_RGBA)

    - o Presentation State Compositing Component Sequence (0070,1805) has one item:

      - RGB Compositor component

    Figure XXX.6-6. VPS Display Pipeline Equivalent to the Enhanced Blending and Display Pipeline for PCS-Values

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DICOM PS3.17 2018b - Explanatory Information