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Filter Manager Level Background Process
Filter Manager

Information in this article applies to:

  • uScope Navigator (All Versions)

Article ID: NFL1049 — Created: 5 May 2017 — Reviewed: 14 Dec 2020

Question

What does the Level Background process do?

Answer

The Level Background process analyzes all the images in a tile set and builds a pseudo flat-field correction image using the pixel data from the four corners of all the images in the tile set. It then applies the correction image to flatten the background portion of each image.

Level Background Process — Before
Level Background Process — Before

Level Background Process — After
Level Background Process — After

The Level Background process is especially useful when you have a tile set that was not scanned with proper flat-field correction.

This process works better for large image sets (more than 100 images). Smaller image sets may show signs of strange artifacts.

Notes
  • You can further improve the effects of the Level Background process by applying image filters to the whole slide image. For example, apply a median filter (to remove noise) followed by a sharpen filter (to enhance edge definition).
  • The Level Background process is applied only when creating a whole scan image.
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