can any one tell me how to extract only the l component of the image ..if the image is rgb ..i want only the l component of the image ,how is it possible
1 visualización (últimos 30 días)
Mostrar comentarios más antiguos
can any one tell me how to extract only the l component of the image ..if the image is rgb ..i want only the l component of the image ,how is it possible
0 comentarios
Respuestas (2)
Dishant Arora
el 10 de Feb. de 2014
R=YourImage(:,:,1);
G=YourImage(:,:,2);
B=YourImage(:,:,3);
5 comentarios
Thomas Seers
el 10 de Feb. de 2014
If so convert to grayscale:
gray = rgb2gray(im); % with image processing toolbox
GIm=0.2989*im(:,:,1)+0.5870*im(:,:,2)+0.1140*im(:,:,3); % without
There are other methods posted here: http://www.johndcook.com/blog/2009/08/24/algorithms-convert-color-grayscale/
Dishant Arora
el 10 de Feb. de 2014
Editada: Dishant Arora
el 10 de Feb. de 2014
you need intensity component?? To get the intensity notion you can take mean of the three components as it happens in HSI model:
I=1/3*(R+G+B);
also you can follow YCbCr model to get intensity:
Y = 0.2126*R + 0.7152*G + 0.0722*B
where Y denotes luminosity.
Thomas Seers
el 10 de Feb. de 2014
Lets say you have a three channel RGB image, im.
% extract the red channel
red = im(:,:,1);
% extract the green channel
green = im(:,:,2);
% extract the blue channel
blue = im(:,:,3);
Simples!
Ver también
Categorías
Más información sobre Get Started with Image Processing Toolbox en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!