Level of Details (LOD)

If the data can be imported into CPU or CUDA memory all at once, LOD supports global illumination for realistic rendering; otherwise, to ensure performance, only ray casting algorithms are supported. Due to the lack of suitable applications for extremely large-scale data, we are only presenting the concept.

Supervoxels are used to store each sub-block and are accessed and traversed in 3D-DDA form during rendering.

In the image below, the first row shows the results rendered without LOD technology; the second row shows the results with LOD applied; and the third row displays the rendering results of the volume data with LOD that has been forcefully magnified.

The image below shows the results obtained from rendering different levels of octree structures.