Ray casting algorithm based on bounding jump and improved inverse distance weighted interpolation
A ray casting algorithm based on bounding jump and improved inverse distance weighted(IIDW)interpolation is proposed for 3D reconstruction of medical images.With bounding jump technology,invalid casted rays are reduced,and empty voxels within the bounding box(BB)which do not contribute to image quality are skipped to improve the rendering speed.The traditional trilinear interpolation method is replaced by the IIDW interpolation,which simplifies the interpolation operation.At the same time,intermediate sampling points are added during the process of image synthesis to improve the quality of the 3D model.Experimental results show that the proposed algorithm can not only improve the rendering speed,but also improve the quality of the generated 3D model.
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