DICOM PS3.4 2019b - Service Class Specifications

N.2.4.3 Blending Operation

The inputs to the blending operation are grayscale values from 0.0 to 1.0 from the underlying image (Yu) and RGB values from 0.0 to 1.0 from the superimposed image (RGBs), and an opacity value from 0.0 to 1.0 (A).

The output is a single image containing RGB values (RGBo) blended as:

Ro = Rs * A + Yu * (1-A)

Go = Gs * A + Yu * (1-A)

Bo = Bs * A + Yu * (1-A)

DICOM PS3.4 2019b - Service Class Specifications