title: Which filter can best remove horizontal vertical banding noises (hvbn) from image
body: <p>I would like to know if among the OpenCV filter functions, is there a particular one that is suited to remove horizontal/vertical banding noise in an image? Like, for salt and pepper noise, Gaussian blur works best. Or, is the process of removing banding noise a combination of different filters?</p>
  
  <p>Did try several filters already like bilateral, gaussian, median and blur(homogenous), but the vertical banding lines don't seem to disappear or significantly reduce, or sometimes the resulting image is just so smoothed. I'd prefer the image to be retained, only that the noise is removed.</p>
  
  <p>I am interested to do the removal of noise in OpenCV, c++ in particular. Any basic steps, concepts or tutorial would be great. Thanks</p>
  
  <p>The sample images are here which shows obvious marks of vertical bands of noise. These images are outputs of a scanner by the way. </p>
  
  <p><a href="https://drive.google.com/file/d/0B1aXcXzD_OADMkNuNnJxNGw2NTA/edit?usp=sharing" rel="nofollow">https://drive.google.com/file/d/0B1aXcXzD_OADMkNuNnJxNGw2NTA/edit?usp=sharing</a>
  <a href="https://drive.google.com/file/d/0B1aXcXzD_OADNkFBbGgxU20yMjg/edit?usp=sharing" rel="nofollow">https://drive.google.com/file/d/0B1aXcXzD_OADNkFBbGgxU20yMjg/edit?usp=sharing</a></p>