Multicolor representation

I had a image with values full of 1 ,2, 3 and 4 ...........I want to represent the value 1 pixels as red color and value 2 pixels as blue color ........Like this i want to differentiate the remaining.............What can i do?,.................Please help me as soon as possible

[Jan]

@DAD: Some suggestions to improve your question:

1. Using a heap of dots decreases the readability.

2. "image with values full of 1,2,3 and 4" is not a unique description of the input data. If you post the Matlab source to create a small example, the readers would exactly know, what you are talking about. Especially the type and dimensions of the inputs are important.

3. "as soon as possible"?! It is sunday and it is my spare time.

[DAD]

I have an image with four different colors as Black,Blue, Green and yellow.

How can I represent these colors as 1, 2, 3 and 4 respectively. Please help me earlier.. Urgent

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/29922-why-your-question-is-not-urgent-or-an-emergency

[Walter Roberson]

Have you considered rgb2ind() ?

Answer 1

[Jan]

Does the command ind2rgb help?

[DAD]

Nice answer

Answer 2

[Image Analyst]

You mean like this:

% Generate some sample data in the range 1-4.
m = randi(4, [50 50]);
% Display the image.
imshow(m, []);
% Set up a colormap.
cmap = [1 0 0; ... % 1 = Red
  0 0 1; ... % 2 = Blue
  0 1 0; ... % 3 = Green
  1 1 0]; % 4 = Yellow.
% Apply the colormap.
colormap(cmap);
colorbar();

% Enlarge figure to full screen.
set(gca, 'units','normalized','outerposition',[0 0 .9 .9]);
set(gcf, 'units','normalized','outerposition',[0 0 1 1]);
set(gcf,'name','Demo by ImageAnalyst','numbertitle','off')

[DAD]

Good