how to get LSB in 8-bit grayscale images

hi, i have one image (8-Bit Gray-scale Image) and i want to omit it's Least_Significant_Bit of it. But i don know how to do it.

[Matt J]

You should not completely rewrite your question after it has been answered. It creates much confusion. Best to start a new one...

Answer 1

[Walter Roberson]

You can use bitset()

Answer 2

[Matt J]

Whatever the problem is, it doesn't originate in the code you've shown. I get no such result

>> img=uint8(randi([0,255],512)); LSBImg =( im2uint8(img) - rem(im2uint8(img), 2)); g= imsubtract(img,LSBImg);

>> whos img LSBImg g
  Name          Size              Bytes  Class    Attributes

    LSBImg      512x512            262144  uint8              
    g           512x512            262144  uint8              
    img         512x512            262144  uint8

[Image Analyst]

What code? I didn't see any code - perhaps he edited it away. The code Matt J has look similar to a question I answered in http://www.mathworks.com/matlabcentral/answers/90789#answer_100248 except that I operated on the uint8 image directly and didn't use im2uint8:

% Set LSB = 0
grayImage2 = grayImage - rem(grayImage, 2);

Answer 3

[Image Analyst]

Try this:

% Set LSB = 0
grayImage2 = grayImage - rem(grayImage, 2);