Suggestions on "How to Scan images" (Feature #2400)

I'm new to Open CV. I'm reading the wiki in order to get started.

http://opencv.itseez.com/doc/tutorials/core/how_to_scan_images/how_to_scan_images.html#how-the-image-matrix-is-stored-in-the-memory
When i first saw the illustration of an RGB image matrix (and the reference to subcolumns) it confused me a bit.
For me it would be more easy and straight-forward to understand if the matrix was described as a 2-d matrix that each of its element corresponds to the an image pixel.
A matrix element hosts a vector, that stores the values of channels (Red Blue and Green). (That is referred as subcolumn.)
Maybe the image for the RGB matrix should be changed too.

[Let me know if there is another place most appropriate for suggestions on wiki and documentation in general]