C.8.19.7.1.1 Mask Visibility Percentage (Informative)

An example of the usage of the Mask Visibility Percentage (0028,9478) attribute is illustrated below.

Assume that P sub is the output pixel level of a subtracted frame, its calculation can be expressed as followed:

P contrast : Pixel level of the contrast frame in the logarithmic domain

P mask : Pixel level of the mask frame in the logarithmic domain

X : Mask Visibility Percentage (0028,9478): 0 <= X <= 100

P sub = P contrast - (1- X/100) * P mask