MATLAB: Combining RGB to get a full image

Image Processing Toolbox

image_RGB = cat(2,final_red,final_green,final_blue)

imshow(image_RGB);

can anyone suggest me that this code is correct for combining RGB components for getting full image

as soon as possible

Best Answer

IMPORTANT NOTE: MATLAB is case sensitive. redchannel is different than redChannel.

It looks like you've taken code I've posted many times and tried to adapt it:

% Extract the individual red, green, and blue color channels.
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);
% Recombine separate color channels into an RGB image.

rgbImage = cat(3, redChannel, greenChannel, blueChannel);

I call them "channels" because that is the terminology Photoshop uses. You have to change the name of the arrays from redChannel to what yours are called. After you split apart your color channels and reprocessed them you have final_red. This, NOT redChannel, is what you need to use. You also need to not change from dimension 3 (which I had) to dimension 2. So the final code would be

    % Recombine separate color channels into an RGB image.
    rgbImage = cat(3, final_red,final_green,final_blue);

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MATLAB: Read three different RGB band and Swap the Band

Try this:

% Extract the individual red, green, and blue color channels.
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);
% Now swap around in any way you want.
newRedChannel = greenChannel;
newGreenChannel = blueChannel; 
newBlueChannel = redChannel;
% Recombine separate color channels into a single, true color RGB image.
NewRgbImage = cat(3, newRedChannel, newGreenChannel, newBlueChannel);

MATLAB: 8 bit depth RGB image(gif)

Copy and paste this example code:

clc;    % Clear the command window.
close all;  % Close all figures (except those of imtool.)
clear;  % Erase all existing variables.
workspace;  % Make sure the workspace panel is showing.
fontSize = 20;
% Change the filename to your filename!
[gifImage cmap] = imread('C:\Users\yourname\Pictures\whatever.gif');
% Display indexed GIF image.
subplot(2,3, 1);
imshow(gifImage);
% Convert to true color RGB image.
rgbImage = ind2rgb(gifImage, cmap);
title('GIF Image', 'FontSize', fontSize);
% Enlarge figure to full screen.
set(gcf, 'units','normalized','outerposition',[0 0 1 1]);
subplot(2,3, 2);
imshow(rgbImage);
title('After conversion to RGB', 'FontSize', fontSize);
% Extract the individual red, green, and blue color channels.
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);
% Display the three component color channels.
subplot(2,3, 4);
imshow(redChannel);
title('Red Channel', 'FontSize', fontSize);
subplot(2,3, 5);
imshow(greenChannel);
title('Green Channel', 'FontSize', fontSize);
subplot(2,3, 6);
imshow(blueChannel);
title('Blue Channel', 'FontSize', fontSize);

Best Answer

Related Solutions

MATLAB: Read three different RGB band and Swap the Band

MATLAB: 8 bit depth RGB image(gif)

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