Local Enhancement

Local Enhancement essentially takes into consideration the local properties of the image by moving a window/mask throughout
the image from pixel to pixel. The histogram of the points in the window is calculated and then a histogram equilization transfer
function is used to map the grey levels of the pixel in the center of the mask.


`Original Image`	`Image after Local Enhancement` `using a mask size of 15x15`

The amount of detail made visible by local enhancement is visible clearly. The effect on the respective histograms is shown below.

Histogram of Original Image Histogram after Local Enhancement

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


`Histogram of Original Image`	`Histogram after Local Enhancement`