Why can fourier transform be used for image recognization while being sensitive to noises?

Posted by user198729 on Stack Overflow See other posts from Stack Overflow or by user198729
Published on 2010-04-05T15:53:44Z Indexed on 2010/04/05 16:53 UTC
Read the original article Hit count: 302

Filed under:

image-processing

|

fourier

As we know Fourier Transform is sensitive to noises(like salt and peppers),

how can it still be used for image recognization?

Is there a FT expert here?

Related posts about fourier

spike in my inverse fourier transform

as seen on Stack Overflow - Search for 'Stack Overflow'
I am trying to compare two data sets in MATLAB. To do this I need to filter the data sets by Fourier transforming the data, filtering it and then inverse Fourier transforming it. When I inverse Fourier transform the data however I get a spike at either end of the red data set (picture shows the first… >>> More
Simple in-place discrete fourier transform ( DFT )

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm writing a very simple in-place DFT. I am using the formula shown here: http://en.wikipedia.org/wiki/Discrete_Fourier_transform#Definition along with Euler's formula to avoid having to use a complex number class just for this. So far I have this: private void fft(double[] data) { … >>> More
Fourier transform software

as seen on Super User - Search for 'Super User'
Hello everyone! After spending a lot of time searching for this, I thought that some SuperUser gurus might know the answer :) I'm searching for an open source application to compute an FFT, that could: * Import a list of points from a text file (in any format, I could write conversion scripts if… >>> More
fourier transform to transpose key of a wav file

as seen on Stack Overflow - Search for 'Stack Overflow'
I want to write an app to transpose the key a wav file plays in (for fun, I know there are apps that already do this)... my main understanding of how this might be accomplished is to 1) chop the audio file into very small blocks (say 1/10 a second) 2) run an FFT on each block 3) phase shift the… >>> More
How to extract semi-precise frequencies from a WAV file using Fourier Transforms

as seen on Stack Overflow - Search for 'Stack Overflow'
Let us say that I have a WAV file. In this file, is a series of sine tones at precise 1 second intervals. I want to use the FFTW library to extract these tones in sequence. Is this particularly hard to do? How would I go about this? Also, what is the bast way to write tones of this kind into a WAV… >>> More

Developer IT

Why can fourier transform be used for image recognization while being sensitive to noises? - Developer IT

Why can fourier transform be used for image recognization while being sensitive to noises?

image-processing

fourier

Related posts about image-processing

image processing

Basic image processing

basic image processing

open source image processing lib in java

Photoshop batch image processing based on EXIF?

Related posts about fourier

spike in my inverse fourier transform

Simple in-place discrete fourier transform ( DFT )

Fourier transform software

fourier transform to transpose key of a wav file

How to extract semi-precise frequencies from a WAV file using Fourier Transforms

Categories cloud