Bit-plane splicing
An image is represented in terms of pixels. See the following image in which yellow rectangle represents pixels values at a specific position in the pointed out are in back image. The binary formats for those values (8-bit representation) are also represented in upper right rectangle, in which values in RED ellipse are lowest order bit and GREEN ones are higher order bit. Image :
These values are represented in Matlab as
>> A = [ 237 240
83 76]
A =
237 240
83 76
Individual bits are retrieved as
>> B = bitget(A,1) % lowest order bit is represented as 1
B =
1 0
1 0
>> C = bitget(A,8) % highest order bit is represented as 8
C =
1 1
0 0
Let’s find out separate bit planes :
>> A = imread('desertg.jpg');
>> B=bitget(A,1);
>> figure,
>> subplot(2,4,1);imshow(logical(B));title('Bit plane 1');
>> B=bitget(A,2);
>> subplot(2,4,2);imshow(logical(B));title('Bit plane 2');
>> B=bitget(A,3);
>> subplot(2,4,3);imshow(logical(B));title('Bit plane 3');
>> B=bitget(A,4);
>> subplot(2,4,4);imshow(logical(B));title('Bit plane 4');
>> B=bitget(A,5);
>> subplot(2,4,5);imshow(logical(B));title('Bit plane 5');
>> B=bitget(A,6);
>> subplot(2,4,6);imshow(logical(B));title('Bit plane 6');
>> B=bitget(A,7);
>> subplot(2,4,7);imshow(logical(B));title('Bit plane 7');
>> B=bitget(A,8);
>> subplot(2,4,8);imshow(logical(B));title('Bit plane 8');
