HIST_SLIDE_CVIP

hist_slide_cvip() - This function performs histogram slide operation.

Contents

SYNTAX

output = hist_slide_cvip(im,offset)

Input Parameters include :

Output parameters include:

DESCRIPTION

This function slides a histogram of an input image. This histogram slide technique can be used to make an image either darker or brighter. However, it retains the relationship between gray-level values. This operation is accomplished by simply adding or subtracting a fixed number from all the gray-level values as follows:

Slide[I(r,c)] = I(r,c) + offset

where the offset value is the amount to slide the histogram.

A positive offset value will increase the overall brightness,while a negative offset will create a darker image.

REFERENCE

1.Scott E Umbaugh. DIGITAL IMAGE PROCESSING AND ANALYSIS: Applications with MATLAB and CVIPtools, 3rd Edition.

EXAMPLE

% Read Image

 X1 = imread('Cam.bmp');
 X2 = imread('Car.bmp');

% Offset

 offset1 =  50;
 offset2 = -50;

% Call function ,Slides the histogram of the input image

 S1 = hist_slide_cvip(X1,offset1);
 S2 = hist_slide_cvip(X2,offset2);

% Display input image

 figure;imshow(X1);title('Input Image1');
 figure;imshow(X2);title('Input Image2');

% Display output image

 figure;imshow(S1,[]);title('Output image1');
 figure;imshow(S2,[]);title('Output image2');

CREDITS

Author: Deependra Mishra, March 2017
Copyright © 2017-2018 Scott E Umbaugh
For updates visit CVIP Toolbox Website

Published with MATLAB® R2014b