经典方法和神经网络对色彩校正的性能比较
Abdullah Kucuk1, Graham D Finlayson1, Rafal Mantiuk2
1School of Computing Sciences, University of East Anglia, Norwich NR4 7TJ, UK.
Journal of imaging
|October 27, 2023
概括
神经网络提供了比简单回归更好的色彩校正,但通过先进的根多项式方法表现优于它们. 新的神经网络方法提高了曝光不变性,但回归方法在色彩校正准确性方面仍然优越.
科学领域:
- 计算机视觉 计算机视觉
- 图像处理 图像处理
- 机器学习 机器学习
背景情况:
- 颜色校正将RAW相机RGB转换为标准的色彩空间,如CIE XYZ.
- 传统方法包括线性,多项式和根多项式最小平方回归.
- 神经网络 (NN) 正在成为色彩校正的替代品.
研究的目的:
- 将神经网络 (NN) 颜色校正与回归方法进行比较.
- 评估NN性能与先进的回归技术对比.
- 调查和改进NN曝光不变性,以实现强大的色彩校正.
主要方法:
- 对NN和回归 (线性,多项式,根-多项式最小平方) 模型的比较分析.
- 调整回归方法以尽量减少感知色彩误差.
- 使用数据增强和新型架构开发暴露不变的NN解决方案.
- 跨数据集培训和测试以评估模型概括性.
主要成果:
- 虽然NN比简单最小平方有所改进,但根多项式回归超越了它.
- 感知误差最小化减少了对线性最小平方的NN优势.
- NN对暴露变化敏感;提出的解决方案可以提高不变性.
- 回归方法在颜色校正准确性方面始终优于NNN,即使在不同的数据集中.
结论:
- 先进的回归技术,特别是根多项式回归技术,与当前的NN方法相比,提供了更好的色彩校正.
- 曝光不变性是NN在色彩校正中的关键挑战,通过数据增强和架构设计来解决.
- 回归方法在色彩校正中表现出更高的稳定性和更高的准确性,特别是当模型在不同的数据集上进行训练和测试时.
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