This is an implementation of non-Deep Learning demosaicing algorithm in OpenCV (C )

• Smooth-hue Interpolation
• Laplacian-corrected Linear Filter
• Gradient-Based Threshold-Free (GBTF)
• Residual interpolation (RI)

• Bayer

  • Wiki:
    • https://en.wikipedia.org/wiki/Demosaicing
    • https://en.wikipedia.org/wiki/Bayer_filter

• OpenCV

  • https://github.com/opencv/opencv/blob/master/modules/imgproc/src/demosaicing.cpp
    • Bilinear
    • Edge-Aware
    • Variable Number of Gradients

• Matlab

  • High quality linear interpolation for demosaicing of Bayer-patterned color images (2004)
  • https://www.mathworks.com/help/images/ref/demosaic.html
  • https://www.ipol.im/pub/art/2011/g_mhcd/article.pdf (review)

• Bilinear interpolation

  • https://en.wikipedia.org/wiki/Bilinear_interpolation

• Smooth-hue Interpolation

  • Demosaicking methods for Bayer color arrays (2002)
  • https://pdfs.semanticscholar.org/28c8/99ab34b6dd91d10474b5635eec6a97b8e3fa.pdf

• Laplacian-corrected Linear Filter

  • Same as above Matlab default demosaicing algorithm

• Gradient-Based Threshold-Free (GBTF)

  • Gradient-Based Threshold-Free Color Filter Array Interpolation (2010)
  • https://ieeexplore.ieee.org/document/5654327
  • https://github.com/RayXie29/GBTF_Color_Interpolation (other's implementation)

• Residual interpolation (RI)

  • Residual interpolation for color image demosaicking (2013)
  • http://www.ok.sc.e.titech.ac.jp/res/DM/RI.pdf
  • include Guided Image Filtering (2010)
  • http://kaiminghe.com/eccv10/