Patent ID: 11875481
Assignee: REALTEK SEMICONDUCTOR CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 3:
4. The method according to claim 3, wherein the channel average of each of the grids is denoted by BGridAvg (i,j), RGridAvg (i,j), GbGridAvg (i,j) and GrGridAvg (i,j), and the pixel average of the pixels in the 4-cell group is denoted by localAvg (i,j,k), wherein (i,j) marks a position of each of the grids, k indicates a position of every pixel in the 4-cell group, and k is a position index of 0 to 15, wherein equations to calculate a fixed pattern noise compensation coefficient (gain (i,j,k)) of pixels are:

gain (i,j,0)=GrGridAvg (i,j)÷localAvg (i,j,0);

gain (i,j,1)=GrGridAvg (i,j)÷localAvg (i,j,1);

gain (i,j,2)=RGridAvg (i,j)÷localAvg (i,j,2);

gain (i,j,3)=RGridAvg (i,j)÷localAvg (i,j,3);

gain (i,j,4)=GrGridAvg (i,j)÷localAvg (i,j,4);

gain (i,j,5)=GrGridAvg (i,j)÷localAvg (i,j,5);

gain (i,j,6)=RGridAvg (i,j)÷localAvg (i,j,6);

gain (i,j,7)=RGridAvg (i,j)÷localAvg (i,j,7);

gain (i,j,8)=BGridAvg (i,j)÷localAvg (i,j,8);

gain (i,j,9)=BGridAvg (i,j)÷localAvg (i,j,9);

gain (i,j,10)=GbGridAvg (i,j)÷localAvg (i,j, 10);

gain (i,j,11)=GbGridAvg (i,j)÷localAvg (i,j,11);

gain (i,j,12)=BGridAvg (i,j)÷localAvg (i,j,12);

gain (i,j,13)=BGridAvg (i,j)÷localAvg (i,j,13);

gain (i,j,14)=GbGridAvg (i,j)÷localAvg (i,j,14); and

gain (i,j,15)=GbGridAvg (i,j)÷localAvg (i,j,15).