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Question

Black level is represented by the formula

a.

[ƒ(x) = 0]

b.

[ƒ(y) = 0]

c.

[ƒ(x,y) = 0]

d.

[ƒ(x,y) = 1]

Answer: (c).[ƒ(x,y) = 0]

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Q. Black level is represented by the formula