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--- code:fx3_hvci_and_fpga_i_c_commands [2020/05/14 22:05] – external edit 127.0.0.1
+++ code:fx3_hvci_and_fpga_i_c_commands [2020/12/14 20:32] – [0xB0-0xCF - Color Correction Matrix (a.k.a. CCM or CMX)] Igor Yefmov
@@ Line 96: / Line 96: @@
 |''0'' Config not busy|Set to ''1'' while the config is not busy|
-===== 0xB0-0xCF =====
+===== 0xB0-0xCF - Color Correction Matrix (a.k.a. CCM or CMX) =====
+Color Correction Matrix is often used as an "add-on" matrix during YUV->RGB conversion. In our case, since the de-bayering and RGB->YUV conversions happen literally on opposite sides of the imaging pipeline, we only use the portion of the corrections designed to compensate for the sensor's cross-talk, converting pre-debayer values \(R_0, Gr_0, Gb_0, B_0\) into \(R, Gr, Gb, B\) that are then used for conversion into RGB:
+\(
+ \begin{bmatrix} R & Gr & Gb & B\end{bmatrix}
+ =
+ \begin{bmatrix}
+ c_{00} & c_{01} & c_{02} & c_{03} \\
+ c_{10} & c_{11} & c_{12} & c_{13} \\
+ c_{20} & c_{21} & c_{22} & c_{23} \\
+ c_{30} & c_{31} & c_{32} & c_{33}
+ \end{bmatrix}
+ \cdot
+ \begin{bmatrix}
+ R_0 \\
+ Gr_0 \\
+ Gb_0 \\
+ B_0
+ \end{bmatrix}
+\)
 ^Name ^Offset ^wIndex ^wValue ^Access type ^Byte length ^Return buffer bits ^Notes ^
 |Reserved|''0xB0''-''0xCF''| | | | | | |

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