Bit plane slicing in image processing using MATLAB

bit plane slicing in image processing using MATLAB

MATLAB Script:

% clearing the output terminal / command window in MATLAB

clc

clear all

% 'imread'command is used to read an image file

% it reads the pixel values of an image matrix

i= imread('.../index.tif');

% 'rgb2grey' command convert the pixel intensity into grey scale value

Image= rgb2gray(i);

% pixel values are stored as 'double' variable as value can exceed from 127

% we can store values ranges from -128 to 127 as 'int' variable

I = double(Image);            

% you know that image pixels usually have 256 distinct intensity levels

% and usually 8 bits / pixel hold the intensity information of grey image

% while 24 bits / pixel hold the intensity informaton of RGB image

% extracting bit one by one from c1(first bit) to c8(last bit) respectively

r1 = mod(I, 2);            % Bit1

r2 = mod(floor(I/2), 2);   % Bit2

r3 = mod(floor(I/4), 2);   % Bit3

r4 = mod(floor(I/8), 2);   % Bit4

r5 = mod(floor(I/16), 2);  % Bit5

r6 = mod(floor(I/32), 2);  % Bit6

r7 = mod(floor(I/64), 2);  % Bit7

r8 = mod(floor(I/128), 2); % Bit8

% plotting the MATLAB figure window into 2 rows and 8 columns

% plotting original image in first subplot

subplot(2, 4, 1);

imshow(Image);

title('Original Image');

 

% plotting binary image having extracted bit from 1st to 8th

% in subplot from 2nd to 9th

subplot(2, 4, 2);

imshow(r1);

title('Bit Plane 1');

subplot(2, 4, 3);

imshow(r2);

title('Bit Plane 2');

subplot(2, 4, 4);

imshow(r3);

title('Bit Plane 3');

subplot(2, 4, 5);

imshow(r4);

title('Bit Plane 4');

subplot(2, 4, 6);

imshow(r5);

title('Bit Plane 5');

subplot(2, 4, 7);

imshow(r6);

title('Bit Plane 6');

subplot(2, 4, 8);

imshow(r7);

title('Bit Plane 7');

subplot(2, 4, 9);

imshow(r8);

title('Bit Plane 8');