Image Enhancement

Some salient features of the implementation have been discussed here.

1.    Image Enhancement in the Spatial Domain

    a).   Image Negative & Contrast Stretching

    b).   Global Histogram Equilization

    c).   Local Enhancement

    d).   Histogram Specification

    e).   Smoothening Filters (Neighbourhood Averaging & Median Filters)

    f ).   Sharpening Filters (Highpass & High boost filters)

    g).   Image Averaging for Noise Reduction

    h).   Halftoning

2.    Image Enhancement in the Frequency Domian

     a).    Ideal Lowpass Filter

     b).    Ideal Highpass Filter

     c).    Butterworth Lowpass Filter

     d).    Butterworth Highpass Filter

3.     Some plots and  comparisons

    a).    Plot of  'N ' vs. ' t '  for the FFT Algorithm

    b).    Effect of Translation and Rotation on the Fourier Transform

    c).    Results of comparison with filters from standard ImageMagick Library

Page last updated on 28 January, 2004.	AT cse.iitd.ac.in	© Parag Chaudhuri , 2009