US 11,793,435 B2
Method and non-transitory computer-readable storage medium for detecting focus of attention
Kuan-Chung Hou, New Taipei (TW); Bo-Ting Wu, New Taipei (TW); Chian-Ying Li, New Taipei (TW); Ming-Hsuan Tu, New Taipei (TW); Chien-Hung Lin, New Taipei (TW); Jian-Chi Lin, New Taipei (TW); Fu-Heng Wu, New Taipei (TW); Kai-Lun Chang, New Taipei (TW); and Tsung-Yao Chen, New Taipei (TW)
Assigned to ACER INCORPORATED, New Taipei (TW)
Filed by Acer Incorporated, New Taipei (TW)
Filed on Mar. 17, 2021, as Appl. No. 17/204,129.
Claims priority of application No. 110104446 (TW), filed on Feb. 5, 2021.
Prior Publication US 2022/0248997 A1, Aug. 11, 2022
Int. Cl. A61B 5/16 (2006.01); A61B 5/1171 (2016.01); A61B 5/00 (2006.01); G06V 40/16 (2022.01)
CPC A61B 5/168 (2013.01) [A61B 5/1176 (2013.01); A61B 5/7246 (2013.01); A61B 5/7264 (2013.01); G06V 40/16 (2022.01); G06V 40/165 (2022.01); G06V 40/168 (2022.01); G06V 40/169 (2022.01); G06V 40/173 (2022.01)] 18 Claims
OG exemplary drawing
 
1. A computer-implemented method for detecting a focus of attention, comprising:
obtaining a face of a person in a first image, as well as the result of facial recognition of the face, wherein the result of facial recognition comprises a face candidate box and a plurality of facial attributes;
determining whether a distance between the person and a target is within an effective attention range based on the face candidate box;
obtaining a plurality of keypoints of the face based on the face candidate box and performing a frontal determination process according to the keypoints, so as to determine whether the face is frontal, in response to the distance between the person and the target being within the effective attention range;
performing an effective-attention-period calculation process based on a series of first images obtained in multiple time points in the past, so as to obtain an effective attention period for the person to the target, and thereby determining whether the effective attention period is not shorter than a period threshold, in response to the face being frontal; and
performing a focus-of-attention calculation process based on the target's size, the keypoints, and the face candidate box after determining that the effective attention period is not shorter than a period threshold, so as to obtain the focus of attention for the person to the target.