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

Claim 12:
13. The system according to claim 12, wherein, in the method for compensating an image having fixed pattern noise, 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 position of each of the grids, k indicates position of every pixel in the 4-cell group, and k is position index of 0 to 15; wherein equations to calculate 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).