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Chapter 13 Special FX
8 Naturally, test images always provide very tidy Vec t or and Wa v e f o r m Displays. The interpretation
of “real” video signals can appear confusing but only at first glance. Here are three examples:
Video image and the associated Vector Display
In this image, a green apple (the Granny Smith variety, to give you an idea) is being dipped in a can of
yellow paint. To the right is a can of blue paint and in the background a few splashes of red, yellow, blue
and turquoise paint.
Every luminous green dot in the Vec t or D i sp l ay stands for a precisely defined hue with a specific satura-
tion. Intensely glowing clumps appear wherever a large number of very similar hues are grouped
together.
The Vec t or Display clearly reflects the yellow and red color components as well as the turquoise splashes.
What is at first surprising is the lack of a distinct “green” display for the apple. Where the human eye
makes a clear distinction, the Ve c t or analysis sees only nuances of yellow.