how to make 3 lsbs set to zero

an rgb image have 8 bit image and how to make last 3 least significant bits to zero of each and every pixel in the image

Answer 1

[Raghunandan V]

Step1: load the rgb image

step2: create a matrix image(x,y,:)

Step3: convert values to binary>> de2bi

Step4: replace the 3 lbs to zero

Step5: convert them back to decimal>> d =bi2de(b)

[niranjan v]

thanku so much sir please can you provide any sample code to replace the 3 lsbs to zero

Answer 2

[Raghunandan V]

I have written a sample code. Please take a look at it.

one point to be noted would be when you convert a decimal to binary in matlab. The value gets converted to a set of chars data units. This is because for a matrix to have zero as decimal means to have nothing but its not the same case with binary as binary is a set of charatcers.

%load the image into the matlab
Test = imread('Sample.jpg');
%convert the complete image into binary
TestBin = dec2bin(Test);
% replace the 3lsb's by 0
TestBin(:, 6:8) = '0';
% convert back to decimal
TestNew = bin2dec(TestBin);
%reshape to the input image size
TestNew = reshape(TestNew, size(Test));
%display the image
imshow(TestNew);