Gradient cross-correlation algorithm for scene-based Shack-Hartmann wavefront sensing Wang, Y. ; Chen, X. ; Cao, Z. ; Zhang, X. ; Liu, C. ; Mu, Q. Abstract Publication: Optics Express Pub Date: June 2018 DOI: 10.1364/OE.26.017549 Bibcode: 2018OExpr..2617549W