Download MetaFun - Pragma ADE

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When we convert color to gray, we use the following formula. This kind of conversion also takes
place in black and white televisions.
G = .30r + .59g + .11b
Section 8.5 introduces the grayed operation that you can use to convert a colored picture into a
gray one. This macro uses the same conversion method as mentioned here.
Managing resources
Embedded graphics