what is Frequency in a image

Applying fourier transform to a image will convert it into frequency domain and the complex values are obtained. Can anyone explain... what does the frequency in a image represent or what does the frequency in a image means.

Answer 1

[David Young]

Another tutorial

Answer 2

[Walter Roberson]

For the first half of the fft results, fft bin index N corresponds to a pattern that occurs (N-1) times across the signal, with bin index 1 corresponding to a constant offset.

So for frequency in an image, substitute the word "image" for "signal" in the above.

Answer 3

[Image Analyst]

Try this tutorial http://sharp.bu.edu/~slehar/fourier/fourier.html

[Gova ReDDy]

Thanks.....

How to select the cutoff frequency of the high pass filter for extracting frequencies of the line contained in this image i.e., the high frequencies

http://tinypic.com/view.php?pic=2yxr9lv&s=5

[Image Analyst]

I'm done with that. We've been over this in countless postings and you know my feelings on it already. You keep trying wrong approaches with a new angle in each new posting. Sorry, but I'm finished discussing that.