MaskedFER2023 and MaskedCK+: Face-masked FER2013 and CK+ datasets for mask-aware facial expression recognition

M-FER2013 and M-CK+ are the masked versions of FER2013 and CK+ datasets. CK+ is a small dataset that contains many highly similar images, as these images are consecutive frames from videos. Source: kaggle.com/datasets/shawon10/ckplus and github.com/spenceryee/CS229/tree/master/CK%2B.

FER2013 is another facial expression recognition dataset similar to CK+ with a larger size. Source: kaggle.com/datasets/msambare/fer2013 M-FER2013_cropped and M-CK+_cropped are the cropped versions of 'M-FER2013' and 'M-CK+', respectively. Only regions near the eyes are preserved, and some poorly masked images (inappropriate masked sizes and positions) are removed.