Discrete Wavelet Transform on Color Picture Interpolation of Digital Still Camera

Algorithm 1

if (|(G8-G18)|>0)&(|(G12-G14)|>0)⋯

 &(|(G8-G18)|<Thd)&(|(G12-G14)|<Thd)⋯

 &(|(G8-G18)|>0&|(G8-G12)|>0&|(G8-G14)|>0)

 cD1H=|(G8-G18)|+(R13^∗2-R3-R23);

 cD2V=|(G12-G14)|+(R13^∗2-R11-R15);

else

 [cA1, cD1]=DWT(G8, G18);

 [cA2, cD2]=DWT(G12, G14);

 cD1H=|(cD1(2:2))|+(R13^∗2-R3-R23);

 cD2V=|(cD2(2:2))|+(R13^∗2-R11-R15);

end

if (cD2V>cD1H)

 G13=(G8+G18)/2+(R13*2-R3-R23)/4;

elseif (cD1H>cD2V)

 G13=(G12+G14)/2+(R13*2-R11-R15)/4;

else

 G13=(G8+G18+G12+G14)/4;

end