Color Mapping / Color Transfer介绍

Color Mapping / Color Transfer

参考综述:Colour Mapping: A Review of Recent Methods, Extensions and Applications

1. 分类

  • Geometry-based
  • Statistical-based
  • user-assisted

image-20200924171517159

2. 介绍

2.1 Geometry-based methods

​ 这类方法一般适用于input image 与 reference image是相同的场景,其需要将input image中的物体转换成reference image中对应物体的颜色,一般有下面几种匹配方法:

  • Sparse correspondence (基于点的匹配),如SIFT特征匹配
  • Region-based correspondence
  • Dense correspondence

2.2 Statistical-based methods

​ 这类方法适用于input image 与 reference image不同场景,通过对图像通道的全局统计量(如均值方差、直方图等)进行转换实现color mapping,具体来说又分为以下两类:

  • Per-channel transfer,此类方法先将图像从RGB通道转换为相关性较低的CIELab,L α β \alpha \beta αβ 等,然后逐通道进行转换
  • Color transfer as a 3D problem,此类方法直接对3通道进行转换,不分离通道
  • Segmentation and clustering,先进行分割或聚类对语义相似区域进行color transfer

2.3 User-assisted solutions

  • Stroke-based approaches
  • Swatch-based approaches