HSL2RGB_CVIP

hsl2rgb_cvip() - Converts Hue-Saturation-Lightness Color value to Red-Green-Blue Color value

Contents

SYNTAX

OutputImage = hsl2rgb_cvip(InputImage, type)

Input parameters include :

Output parameter includes :

DESCRIPTION

This function converts HSL (Hue-Saturation-Lightness) Color value to RGB Color value. The RGB color model is an additive color model in which red, green and blue light are added together in various ways to reproduce a broad array of colors. RGB color values are found from HSL color values as follows:

                 C = (1-|2L-1|) * S
                 H' = H/60
                 X = C * (1-|H' mod 2 - 1|)

                             (0,0,0)
                             (C,X,0)
                             (X,C,0)
                 R1,G1,B1 = (0,C,X)
                             (0,X,C)
                             (X,0,C)
                             (C,0,X)

                 m = L - 0.5*C

                 (R,G,B) = (R1+m, G1+m, B1+m)

To view the 8-bit image of type double, divide by 255. To view the 16-bit image of type double, divide by 65535.

REFERENCE

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

EXAMPLE

% Read image

 X = imread('Car.bmp');

% Call function

 S1 = rgb2hsl_cvip(X);

 S2 = hsl2rgb_cvip(S1);

% Display input image

 figure;imshow(X);title('Input image');

% Display output images

 figure;imshow(remap_cvip(S1),[]);title('Output image from rgb2hsl');

 figure;imshow(remap_cvip(S2),[]);title('Output image from hsl2rgb');

CREDITS

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

Published with MATLAB® R2016a