how to make 3 lsbs set to zero

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niranjan v
niranjan v 2019-3-14
回答： Raghunandan V 2019-3-14
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

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回答（2 个）

Raghunandan V
Raghunandan V 2019-3-14
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)
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niranjan v
niranjan v 2019-3-14
thanku so much sir please can you provide any sample code to replace the 3 lsbs to zero

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Raghunandan V
Raghunandan V 2019-3-14
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);

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