Stephen M. Pizer Ja-Yeon Jeong Robert E. Broadhurst Sean Ho Joshua Stough Deep Structure of Images in Populations Via Geometric Models in Populations. 49-59 2005 conf/dsscv/2005 DSSCV https://doi.org/10.1007/11577812_5 db/conf/dsscv/dsscv2005.html#PizerJBHS05