Detect edge and remove it

I need to combine the black and white colour together and left this picture with only the words and number.. can anyone show me on the right approach to solve this problem.

Answer 1

[Cedric]

 % - Read RGB image and convert to BW.
 BW = im2bw( imread( 'TEST_7.jpg' )) ;

 % - Build vectors of logicals targeting all-black rows/cols.
 colId = ~sum( BW, 1 ) ;
 rowId = ~sum( BW, 2 ) ;

 % - Make them all white.
 BW(:,colId) = 1 ;
 BW(rowId,:) = 1 ;

 % - Show result.
 imshow(BW)

Is it what you are trying to achieve?

[hadi]

Yes sir cedric. this is definitely the answer that i am looking for.

thank you for your help sir :)

[Cedric]

You're welcome!

Answer 2

[Image Analyst]

You can simply do this:

binaryImage = imclearborder(~binaryImage);

This gives white letters on a black background (what is needed for most subsequent operations). Invert it if you want black letters on a white background.

binaryImage = ~imclearborder(~binaryImage);

[Cedric]

I didn't know IMCLEARBORDER, thank you for the update!

[hadi]

hi this seems late but i just want to say thank you..

your solution has made me solve one of my new problem..