MULTIRESOLUTION RENDERING BASED ON GPGPU COMPUTING
DOI:
https://doi.org/10.47839/ijc.12.4.609Keywords:
Compressed volume rendering, texture mapping, multiresolution rendering, wavelet transform, quantization, CUDA, OpenGL.Abstract
The problem of visualizing large volumetric datasets is appealing for computation on the GPU. Nevertheless, the design of GPU volume rendering solutions must deal with the limited available memory in a graphics card. In this work, we present a system for multiresolution volume rendering which preprocesses the dataset dividing it into bricks and generating a compressed version by applying different levels of compression based on wavelets. The compressed volume is then stored in the GPU memory. For the later visualization process by texture mapping each brick of the volume is decompressed and rendered with a different resolution level depending on its distance to the camera. This approach computes most of the tasks in the GPU, thus minimizing the data transfers among CPU and GPU. We obtain competitive results for volumes of size in the range between 64 and 256.References
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