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--- isp:gamma [2019/05/08 17:10]
Igor Yefmov created
+++ isp:gamma [2019/05/09 00:12] (current)
Igor Yefmov
@@ Line 1: / Line 1: @@
 ====== Gamma ======
-More precisely - this is a "gamma encoding" that is originally used to correct for the old-school %%CRT%%-type monitors' ''x<sup>2.2</sup>'' voltage correction.
+More precisely - this is a "gamma encoding" that is originally used to correct for the old-school %%CRT%%-type monitors' \(x^{2.2}\) voltage correction.
-Gamma encoding is calculated as a power function, where each pixel's ''L'' component (in HSL color space) is corrected.
+Gamma encoding is calculated as a power function, where each pixel's \(L\) component (in HSL color space) is corrected.
-For now we are using a simplified single-curve method which will eventually be replaced with a more sophisticated multi-point curve that would allow a user to specify a curve using up to ''N'' knee points (at which point it will no longer be proper to call this "gamma" but rather something else).
+For now we are using a simplified single-curve method which will eventually be replaced with a more sophisticated multi-point curve that would allow a user to specify a curve using up to \(N\) knee points (at which point it will no longer be proper to call this "gamma" but rather something else).
-Implementation-wise there's nothing special about this (assuming ''L'' is in range ''[0..1]'' and ''_gamma'' is ''≥1''):
+Implementation-wise there's nothing special about this (assuming \(L \in [0..1]\) and \(\_gamma \leq 1\)):
 <code c++>// pseudo-code
 void gamma(/*array of pixels*/image, double _gamma){

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