TY - JOUR T1 - Properties of a general quaternion-valued gradient operator and its applications to signal processing JO - Frontiers of Information Technology & Electronic Engineering UR - https://eprints.whiterose.ac.uk/id/eprint/97387 UR - http://dx.doi.org/10.1631/FITEE.1500334 PY - 2016/02/01 AU - Jiang M-D AU - Li Y AU - Liu W ED - DO - DOI: 10.1631/FITEE.1500334 PB - Springer Verlag VL - 17 IS - 2 SP - 83 EP - 95 Y2 - 2025/10/31 ER -