Question

what is output for rgb order in the attached program

Answer 1

Answer:

% Read in original RGB image.

rgbImage = imread('flower.png');

% Extract color channels.

redChannel = rgbImage(:,:,1); % Red channel

greenChannel = rgbImage(:,:,2); % Green channel

blueChannel = rgbImage(:,:,3); % Blue channel

% Create an all black channel.

allBlack = zeros(size(rgbImage, 1), size(rgbImage, 2), 'uint8');

% Create color versions of the individual color channels.

just_red = cat(3, redChannel, allBlack, allBlack);

just_green = cat(3, allBlack, greenChannel, allBlack);

just_blue = cat(3, allBlack, allBlack, blueChannel);

% Recombine the individual color channels to create the original RGB image again.

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

% Display them all.

subplot(3, 3, 2);

imshow(rgbImage);

fontSize = 20;

title('Original RGB Image', 'FontSize', fontSize)

subplot(3, 3, 4);

imshow(just_red);

title('Red Channel in Red', 'FontSize', fontSize)

subplot(3, 3, 5);

imshow(just_green)

title('Green Channel in Green', 'FontSize', fontSize)

subplot(3, 3, 6);

imshow(just_blue);

title('Blue Channel in Blue', 'FontSize', fontSize)

subplot(3, 3, 8);

imshow(recombinedRGBImage);

title('Recombined to Form Original RGB Image Again', 'FontSize', fontSize)

% Set up figure properties:

% Enlarge figure to full screen.

set(gcf, 'Units', 'Normalized', 'OuterPosition', [0, 0, 1, 1]);

% Get rid of tool bar and pulldown menus that are along top of figure.

% set(gcf, 'Toolbar', 'none', 'Menu', 'none');

% Give a name to the title bar.

set(gcf, 'Name', 'Demo by ImageAnalyst', 'NumberTitle', 'Off')