channel_invert
[Algorithms and Utility Functions]

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Detailed Description

Returns the inverse of a channel. result = max_value - x + min_value.

Example:

// bits8 == uint8_t == unsigned char
bits8 x=255;
bits8 inv = channel_invert(x);
assert(inv == 0);

Functions
template<typename Channel>
channel_traits< Channel > ::value_type	channel_invert (Channel x)
	Default implementation. Provide overloads for performance.