Share 'Image Averaging in C#'

I'm writing a C# script in Grasshopper to perform image averaging.  The goal is to analyze the color gradient of an architectural plan and apply transformations (TBD) to produce different effects. Although Grasshopper has an image sampler component, I wanted to code one myself but am facing difficulties in assigning a Type Hint to the C# input - there is no Image option. Does anyone have suggesti…