CalibrateDSX: The Importance of Image Smoothing and Downsampling

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DRR-based tracking of bones in X-ray images relies heavily on the brightness of the bones' edges in the edge-detected images. Smoothing and/or resizing the images during correction increases their signal-to-noise ratio, resulting in brighter edges. Some amount of smoothing or resizing is almost always needed to maximize the trackability of the bones.

Original and edge-detected:

Smoothed (left), resized(right):

Smoothed and resized:

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