A Chromaticity Space for Specularity-, Illumination Color- and Illumination Pose-Invariant 3-D Object Recognition. - Daniel Berwick; Sang Wook Lee (ICCV, 1998)

Spectro-Spatial Gradients for Color-Based Object Recognition and Indexing. - Daniel Berwick; Sang Wook Lee (CAIP, 1999)

Increasing the Discrimination Power of Spectral Spatial Gradients. - Daniel Berwick; Sang Wook Lee (CVPR (2), 2001)

A framework for color image indexing and object recognition: Spectral and spectral spatial gradients. - Daniel Berwick (2001)

Spectral gradients for color-based object recognition and indexing. - Daniel Berwick; Sang Wook Lee (Comput. Vis. Image Underst., 2004)