52.6.8 Color Correction (CC) Module

RGB color correction is used to compensate for cross color bleeding in the filter used with the image sensor. The module samples the cfa_data[35:0] 36-bit bus when cfa_valid is asserted and generate a cc_data[35:0] 36-bit wide bus and a cc_valid signal.

There are three {gain, offset} sets for color component R, G, B.


ISC_CC_CTRL.ENABLE	CC_DATA Slice	Value
0	cc_data[35:24]	cfa_data[11:0]
	cc_data[23:12]	cfa_data[11:0]
	cc_data[11:0]	cfa_data[11:0]
1	cc_data[35:24]	R=clipped(sum(cfa_data_x * gain_Rx) + offset_R)
	cc_data[23:12]	G=clipped(sum(cfa_data_x * gain_gx) + offset_g)
	cc_data[11:0]	B=clipped(sum(cfa_data_x * gain_Bx) + offset_B)

[\begin{matrix} R \\ G \\ B \end{matrix}] = [\begin{matrix} RRGAIN & RGGAIN & RBGAIN \\ GRGAIN & GGGAIN & GBGAIN \\ BRGAIN & BGGAIN & BBGAIN \end{matrix}] \times [\begin{matrix} cfa_data[35:24] \\ cfa_data[23:12] \\ cfa_data[11:0] \end{matrix}] + [\begin{matrix} ROFST \\ GOFST \\ BOFST \end{matrix}]