学习恢复压缩点云属性:完全基于数据的方法和基于规则的解卷优化
IEEE transactions on visualization and computer graphics
|March 12, 2024
概括
本研究比较了两种方法来恢复基于几何的点云压缩 (G-PCC) 的视觉质量. 神经SAO提供了显著的改进,但是复杂的,而NeuralBF更简单,更好地概括G-PCC属性恢复.
科学领域:
- 计算机视觉 计算机视觉
- 信号处理 信号处理
- 全息媒体全息媒体
背景情况:
- 基于几何的点云压缩 (G-PCC) 对全息媒体至关重要,但引入了视觉工件.
- 这些工件通过影响RGB颜色等属性来降低体验质量 (QoE).
研究的目的:
- 调查和比较用于恢复G-PCC压缩点云属性的后处理过器.
- 评估数据驱动和基于规则的恢复方法的性能,复杂性和概括能力.
主要方法:
- 开发了NeuralSAO,一种基于学习的方法,使用多尺度特征进行量化错误补偿.
- 提出NeuralBF,一个双边过器,具有可学习的降噪参数,考虑几何和光度贡献.
- 在G-PCC压缩点云属性上比较NeuralSAO和NeuralBF.
主要成果:
- 神经SAO实现了最先进的质量改进,在固点云上降低了20%的Bjøntegaard三角洲率 (BD-BR).
- 虽然NeuralBF实现了NeuralSAO的一半的收益,但它展示了轻量级的设计和令人印象深刻的概括性.
- 神经SAO被证明是计算密集型,容易出现泛化问题.
结论:
- 对比分析强调了大规模数据驱动 (NeuralSAO) 和小规模基于规则的 (NeuralBF) 过器之间的权衡,用于点云属性恢复.
- 了解过器容量是优化G-PCC在网络全息服务中的质量恢复的关键.
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