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The area of interest for hypomimia. The blue square blocks represent the top 10 significant texture features, the darker blue squares indicate areas with time dimension (XT plane or YT plane). The light blue belongs to XY plane, the blue is XT plane, the darker blue is YT plane. The red arrows represent the top 10 significant facial expression change factors (FECFs) corresponding to the facial expression factors (FEFs). This image is published with the patient/participant’s consent.
