How to get binary data from RGB images

how to get biner data if we have code like this :

what code should add so that it can get binary data from RGB ?

uint8Image = 255 * uint8('handles.image'); 
% binaryImage is your segmented image.
% Get base file name.  Discard any extension they may have entered, like jpg.
[f, baseFileNameNoExt, ext] = fileparts(nama_file_simpan); 
% Construct full file name.
fullFileName = fullfile(path_simpan, [baseFileNameNoExt, '.png']);
% NEVER use jpg for image analysis.  Use PNG.
% Now do the actual save of the segmented image to disk as a PNG format image.
save('uint8Image', 'fullFileName');

[Rik]

Not all comments seem to make sense with the code and some of the code looks like you probably want to do something else:

• handles.image is probably a variable, so converting the char array to uint8 is probably not the intention
• save('uint8Image', 'fullFileName'); looks like you want to save the two variables, but it is going to save the second variable in uint8Image.mat. You should probably use imwrite here.

[Rik]

Also, if you directly take code from another post, please link to it. And don't edit code you don't understand.

[olivio gusmao]

okay i get it .thank u