Place Pulse is a crowdsourcing project that has built an online platform for individuals to rate their emotional perception of street scenes. It invites Internet volunteers from around the world to participate in the experiment, that is, to choose one of two randomly given street scene pictures that they think is safer/depressing/lively/...

Place Pulse has collected more than 1.5 million reports and evaluated more than 100,000 images from 56 cities.