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benhenryL committed Dec 9, 2023
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Expand Up @@ -236,6 +236,14 @@ <h2 class="title is-3">Compensation for Sparse Point Cloud</h2>
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<img src="./static/images/compensation_depth.jpg" style="width:100%">

<p align="justify">3D-GS's reconstruction quality heavily relies on the initial point cloud which is obtained from structure-from-motion (SfM).
However, SfM produces only sparse point clouds if the given images are blurry. Even worse, if the scene has a large depth of field
which is prevalent in defocus blurry scenes, SfM hardly extracts any points that lie on the far end of the scene.
To make a dense point cloud, we add additional points on the periphery of the existing points using K-Nearest-Neighbor (KNN) algorithm during the training.
Furthermore, we prune 3D Gaussians depending on their relative depth. We loosely prune the 3D Gaussians placed on the far edge of the scene to keep
more 3D Gaussians on the far plane.
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