I assume you take the Wright brother's Flyer to travel... After all, all planes derive from it, right?
As to the function, looking at the source code for the fuzzy selector, it just computes the absolute value of the difference between channels (R,G,B or L,C,H)(and takes the max of the R/G/B differences for "composite").
As to the function, looking at the source code for the fuzzy selector, it just computes the absolute value of the difference between channels (R,G,B or L,C,H)(and takes the max of the R/G/B differences for "composite").