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

Claim 6:
7. The method according to claim 6, wherein equations for calculating the fixed pattern noise compensation coefficient of the pixel at the edge by the extrapolation are:

upper edge: gain(0,j,k)=2×gain(1,j,k)−gain(2,j,k), wherein 1≤j≤n; 

lower edge: gain(m+1,j,k)=2×gain(m,j,k)−gain(m−1,j,k), wherein 1≤j≤n; 

left edge: gain(i,0,k)=2×gain(i,1,k)−gain(i,2,k), wherein 1≤i≤m; 

right edge: gain(i,n+1,k)=2×gain(i,n,k)−gain(i,n−1,k), wherein 1≤i≤m; 

upper left: gain(0,0,k)=2×gain(1,1,k)−gain(2,2,k);

upper right: gain(0,n+1,k)=2×gain(1,n,k)−gain(2,n−1,k);

bottom left: gain(m+1,0,k)=2×gain(m,1,k)−gain(m−1,2,k); and

bottom right: gain(m+1,n+1,k)=2×gain(m,n,k)−gain(m−1,n−1,k);

wherein “m” is a height of an original grid of the image, “n” is a width of the original grid of the image, “gain(i,j,k)” is the fixed pattern noise compensation coefficient of the pixel of the image, “(i,j)” is used to describe a position of the grid after the row and column are added, and “k” is a position index of the pixel.