DENVER (AP) – More than 1,700 people walking on a University of Colorado campus were unknowingly photographed as part of a facial recognition research project. Professor Terrance Boult set up a long-range surveillance camera in an office window at the Colorado Springs campus, capturing more than 16,000 images of passers-by during the spring semesters of 2012 and 2013. Boult says the images were collected to create a dataset as part of an effort to enhance facial recognition technology. The dataset was made publicly available online in 2016, but it was taken down in April. Boult says he waited five years to release the dataset online to protect student privacy. University spokesman Jared Verner says a panel reviewed the research protocol for the project.