https://github.com/wonderchang/img-fft

2D fourier transfrom, image processing
https://github.com/wonderchang/img-fft

Last synced: about 2 months ago
JSON representation

2D fourier transfrom, image processing

• Host: GitHub
• URL: https://github.com/wonderchang/img-fft
• Owner: wonderchang
• Created: 2014-02-28T18:13:36.000Z (almost 11 years ago)
• Default Branch: master
• Last Pushed: 2014-03-05T17:25:21.000Z (almost 11 years ago)
• Last Synced: 2024-12-15T18:48:23.131Z (about 2 months ago)
• Language: Python
• Homepage:
• Size: 5 MB
• Stars: 6
• Watchers: 3
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

        
Image fourier transform

=======

This program is a tiny tool for fourier transform on image processing. It is implemented by the powerful language, Python, which provides the awesome mathematical library, [Scipy](http://www.scipy.org/). The program let you generate the results of the fourier transform of the image quickly.

About

======

###Image format###

Only png, jpg, jpeg, bmp, tif can read.

###The value of the range

The values of each position on the transform image are processed by log finally. The range of the values is max = 16, min = 0. The red color represents the higher value, blue color means lower value.

###Output figure###

The output figure is an [512X512] resolution patterns of the transform results.





###Output data###

The output data is an [512X512] matrix, see [fft-data-lena.matrix](fft-data-lena.matrix)

    6.107,7.665,6.888,7.622,7.225,6.984,6.787, ... ,6.231

    6.318,5.881,5.533,6.911,7.208,7.215,7.084, ... ,6.398

    6.713,7.500,7.346,6.683,6.811,7.561,7.001, ... ,4.442

    7.163,6.742,7.424,7.458,5.834,6.784,7.289, ... ,6.246

    6.784,7.228,7.300,6.807,6.110,6.841,4.407, ... ,5.527

                        :

                        :

                        :

                        :

                        :

    6.528,6.978,6.652,7.033,7.053,6.760,7.116, ... ,6.967

    

How to use

======

Command line:  

    

    $ python img-fft.py lena.png

    

Some detail:    

The default is output both figure image and the data file.

    

    Usage: python img-fft.py [options] [(filename|directory)+]

    

    Options:

      -f, --figure  Only output the Fourier transform figure file

      -d, --data    Only output the Fourier transform data file