Pada pengolahan citra digital, metode frequency domain dapat digunakan untuk menyelesaikan masalah-masalah tertentu yang sulit jika dilakukan dengan menggunakan metode spatial domain. Pada metode frequency domain, informasi citra digital ditransformasikan lebih dulu dengan transformasi Fourier, kemudian dilakukan manipulasi pada hasil transformasi Fourier tersebut. Setelah manipulasi selesai, dilakukan inverse transformasi Fourier untuk mendapatkan informasi citra kembali. Noise yang dapat dihilangkan atau dikurangi dengan metode ini adalah noise yang menghasilkan pola tertentu pada spektrum Fouriernya, misalnya berupa garis lurus.
Dokumen ini juga dapat didownload dalam format file pdf dari http://www.snpages.info/files/u1/RR-03-2005-STIKOM.pdf
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