title: Which kernel that make image brighter or darker?
body: <p>Below is the list of kernel</p>
  
  <p>Kernel A</p>
  
  <p><a href="https://i.stack.imgur.com/29EKs.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/29EKs.png" alt="Image of Kernel A"></a></p>
  
  <p>Kernel B</p>
  
  <p><a href="https://i.stack.imgur.com/gmDEx.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/gmDEx.png" alt="Image of Kernel B"></a></p>
  
  <p>Kernel C</p>
  
  <p><a href="https://i.stack.imgur.com/NlMKa.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/NlMKa.png" alt="Image of Kernel C"></a></p>
  
  <p>I know that Kernel A is a low pass filter which is for blurring, but B and C are high pass filter.</p>
  
  <p>High pass filter is for making image sharper but how to identify between B and C</p>
  
  <p>that can make image brighter or darker?</p>