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Article ID: NFL1045 — Created: 5 May 2017 — Reviewed: 11 Mar 2018
What does the flatten background process do?
The flatten background process analyzes all the images in a tile set searching for the brightest pixel in each position. It uses this information to build an adjustment image that is applied to each image to flatten the background portion of each image.
This process is especially useful for removing small illumination gradient effects that, while not apparent on any individual image, are visible when viewing a complete tile set or deep zoom image.
This process works better for large image sets (more than 100 images). Smaller image sets may show signs of strange artifacts.
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