# Explain to me the concept of 2-D FFT

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#### salma ali bakr

2-D FFT

i need to know the concept of 2-D FFT, i can't get the hang of it ???

thanks,
Salma

#### Antonios

##### Banned
Re: 2-D FFT

https://www.dspguide.com
this is good book about DSP. it talk about phisical meaning and it is simple

### salma ali bakr

Points: 2

#### Manny_Calavera

##### Junior Member level 3
Re: 2-D FFT

Salma,

Analogous to the 1-D FT, the 2-D FT will extract the repetitive patterns (frequencies in 1-D signls) present along a certain direction at incremental rates. These patterns are manifested as a gradual smooth transitions in color intensity (just like sine waves). Just like 1-D FT, the whole operation is a mere projection for the 2-D picture on a new plane whose kernel is the 2-D set of all special frequencies. Very similar to saying that the set [14 8] is equal to [2 4](*)(7 2) (a 1-D decomposition analogy). In its essence, the whole projection thing is a form of compression if you like. In the previous example, saying [2 4] is obviously simpler than saying [14 8] provided that you know the kernel on which I performed my operator (7 2), which is by the way a fictitious operator I came up with.

Hope this is beneficial.

Cheers.

PS: FFT is the Fast FT and is meaningless without the original famous Fourier Transform.

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