The database was developed by the Joint Research & Development Laboratory (JDL) of the Chinese Academy of Sciences (CAS). Its primary purpose is to provide researchers with a robust dataset for training and testing algorithms against real-world visual challenges. Core "PEAL" Features
The database systematically varies images across these categories: Cas Peal
: Includes various facial expressions such as neutral, smile, surprise, frown, and closed eyes. The database was developed by the Joint Research
: Subjects are photographed wearing different accessories, including various pairs of glasses and different types of caps. Cas Peal
: Features images taken under 15 different lighting directions to test an algorithm's robustness to shadows and illumination changes. Database Specifications