MATLAB: 24-bit RGB -> 3-bit RGB conversion

image processing

Hi,

I need a conversion for images whose RGB values are 8-bit each, and I want to degrade them to 3-bit RGB. I think there is no single solution and I'm trying to get an effective way to do it.

Could you help about what kind of functions I need to use?

Thanks.

Best Answer

RGB3 = uint8(IMG >= 128);

Related Solutions

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);

MATLAB: RGB32 To Grayscale 12 bit conversion

Here's one way:

rgbImage8Bit = imread(fullFileName);
grayImage = rgb2gray(im2double(rgbImage8Bit));
% It's still in the original range.
% Scale it to be in the larger 16 bit image range.
grayImage = uint16(grayImage * 65535);
fprintf('The class of grayImage is %s.\n', class(grayImage));

but that's not the same as having a 16 bit grayscale camera like you were asking about in your other post.

Best Answer

Related Solutions

MATLAB: 8 bit depth RGB image(gif)

MATLAB: RGB32 To Grayscale 12 bit conversion

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