5.1ๅพๅ้ๅ/ๅคๅ่ฟ็จ็ๆจกๅ g(x,y)=f(x,y)h(x,y)+n(x,y) G(u,)=F(u,)H(u,)+N(u,) h(x,y) f(x,y) g(x,y) DFT DFT DFT F(u,v) H(u,v) G(u,) g(๐ฅ, ๐ฆ) = ๐(๐ฅ, ๐ฆ)๏ชโ(๐ฅ, ๐ฆ) + ๐(๐ฅ, ๐ฆ) ๐บ(๐ข, ๐ฃ) = ๐น(๐ข, ๐ฃ)๐ป ๐ข, ๐ฃ + ๐(๐ข, ๐ฃ) 5.1 ๅพๅ้ๅ/ๅคๅ่ฟ็จ็ๆจกๅ ๏ช = × = DFT DFT DFT ๐(๐, ๐) ๐ญ(๐, ๐) ๐(๐, ๐) ๐ฏ(๐, ๐) g(๐, ๐) ๐ฎ(๐, ๐)