Person under surveillance 意思 - Surveillance

Please see the database web page and the technical report linked there for more details.

As the location and size of faces in LFW was determined through the use of an automatic face locator detector , the cropped faces in LFWcrop exhibit real-life conditions, including mis-alignment, scale variations, in-plane as well as out-of-plane rotations.

We've had it under surveillance for the past two years.

The Sheffield Face Database previously: The UMIST Face Database Consists of 564 images of 20 people.