ImageCore is the lowest-level component of the system of packages designed to support image processing and computer vision. Its main role is to simplify "conversions" between different image representations through different "view" types, and to provide some useful low-level functions (including "traits") that simplify image display, input/output, and the writing of algorithms.

If you're just getting started with images in Julia, it's recommended that you see the introductory documentation. In particular, this document assumes that you understand how Julia represents color through the used of fixed-point numbers.