研究视图合成对光场压缩质量的影响，发现合成视图会降低主观感知质量。
Subjective Evaluation of Low Distortion Coded Light Fields with View Synthesis
- 通过删减视图并重建，测试压缩后视图合成的视觉效果
- 使用JPEG AIC-3方法评估，发现合成视图质量下降明显
- 适合关注光场压缩与渲染质量关系的研究者
光场技术能捕获场景中光线的强度与方向，支持3D重建与多种应用，但数据量巨大，高效压缩至关重要。视图合成在光场技术中用于生成新视角，但其与压缩的交互尚未充分研究。本文通过从原始光场中删减视图构建稀疏光场，分别用JPEG Pleno和VVC编码，再对压缩后的稀疏光场进行视图合成，恢复原视图数量。采用JPEG AIC-3主观评测方法评估质量：两组图像交替显示，用户选择哪侧闪烁更明显以判断质量高低。基于主观结果，验证了若干评价指标的有效性。
原文摘要 · Abstract (English)
Light field technology is a powerful imaging method that captures both the intensity and direction of light rays in a scene, enabling the reconstruction of 3D information and supporting a range of unique applications. However, light fields produce vast amounts of data, making efficient compression essential for their practical use. View synthesis plays a key role in light field technology by enabling the generation of new views, yet its interaction with compression has not been fully explored. In this work, a subjective analysis of the effect of view synthesis on light field compression is conducted. To achieve this, a sparsely sampled light field is created by dropping views from an original light field. Both light fields are then encoded using JPEG Pleno and VVC. View synthesis is then applied to the compressed sampled light field to reconstruct the same number of views as the original. The subjective evaluation follows the proposed JPEG AIC-3 test methodology designed to assess the quality of high-fidelity compressed images. This test consists of two test stimuli displayed side-by-side, each alternating between an original and a coded view, creating a flicker effect on both sides. The user must choose which side has the stronger flicker and, therefore, the lower quality. Using these subjective results, a selection of metrics is validated.
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