Facial expression data is characterized by a significant imbalance, with most collected data showing happy or neutral expressions and fewer instances of fear or disgust. This imbalance poses challenges to facial expression recognition (FER) models, hindering their ability to fully understand various human emotional states. Existing FER methods typically report overall accuracy on highly imbalanced test sets but exhibit low performance in terms of the mean accuracy across all expression classes. In this paper, our aim is to address the imbalanced FER problem. Existing methods primarily focus on learning knowledge of minor classes solely from minor-class samples.

Fox News Flash top headlines are here. Check out what's clicking on Foxnews.com. A small-town Idaho police department and community have vowed to "leave no stone unturned" in the continued search for a 5-year-old boy who vanished near his home nearly three weeks ago. Since the disappearance of Michael Joseph Vaughan in Fruitland on the evening of July 27, investigators have yet to find any signs of the missing child. "As we head into the weekend, and as people gather to enjoy time together, please take a moment to be grateful for the family and friends around you," the Fruitland Police Department said Friday.