How to filter noise images?

[tiho_bg]

Hello,

I would like to filter noise images. Here is one of my images and the result after filtering the image with the Vision Assistant. I would like to filter the separated cells as much as possible but the noise generated by the fluid flow as a background could not be filtered. I would like to delete the the lines of the fluid flow from the image. Could you please assist me or advise me? Thank you!

The spherical objects are biological cells. In a microfluidic channel I put a suspension with cells and I make 7 images with 7 different microfluidic pressures. I've attached the first and the last image. At the beginning the cells are almost spherical but during the increase of the pressure they become more elliptical. The background is always horizontally banded. I need an image output in fact and a count of the cells.

[altenbach]

Note that this is a duplicate discussion.

Plain LabVIEW solutions have already been posted, so this discussion should be limited to the vision tools.