title: Detect Narrow Line in very noise image
body: <p>I have performed preprocessing steps in an noisy acoustic image and now I need to detect narrow black lines.</p>
  
  <p>Can you think of a better way to detect these lines?</p>
  
  <p><a href="https://i.stack.imgur.com/dS8AY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/dS8AY.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/SQuJ5.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/SQuJ5.png" alt="enter image description here"></a></p>
  
  <p>My goal is to detect the line in the red box in this image.</p>
  
  <p><a href="https://i.stack.imgur.com/ZrdaU.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ZrdaU.png" alt="enter image description here"></a></p>