US 12,386,421 B2
Visual brain-computer interface
Sid Kouider, Paris (FR); Nelson Steinmetz, Paris (FR); Robin Zerafa, Paris (FR); and Guillaume Ployart, Paris (FR)
Assigned to NextMind SAS, Paris (FR)
Appl. No. 17/756,173
Filed by NextMind SAS, Paris (FR)
PCT Filed Nov. 6, 2020, PCT No. PCT/EP2020/081348
§ 371(c)(1), (2) Date May 18, 2022,
PCT Pub. No. WO2021/099148, PCT Pub. Date May 27, 2021.
Claims priority of provisional application 62/938,098, filed on Nov. 20, 2019.
Prior Publication US 2022/0409094 A1, Dec. 29, 2022
Int. Cl. G06F 3/01 (2006.01); G06V 10/30 (2022.01); G06V 40/10 (2022.01)
CPC G06F 3/015 (2013.01) [G06V 10/30 (2022.01); G06V 40/10 (2022.01); G06V 40/15 (2022.01)] 15 Claims
OG exemplary drawing
 
1. A method of tracking visual attention, the method comprising: obtaining a base image; generating a visual stimulus by performing operations comprising: processing a portion of the base image to extract high spatial frequency (HSF) components of the base image, the visual stimulus having a characteristic modulation, the characteristic modulation being applied to the HSF components of the base image, the HSF components having a spatial frequency higher than a predetermined high spatial frequency threshold; processing the portion of the base image to generate low spatial frequency (LSF) components of the base image, the LSF components having a spatial frequency lower than a predetermined low spatial frequency threshold; applying at least one of a spatial frequency filter or a spatial frequency transform to the portion of the base image; and storing the LSF components and the HSF components as LSF map data and HSF map data respectively; displaying the visual stimulus via a graphical user interface (GUI) of a display; receiving neural signals of a user from a neural signal capture device; and on the basis of detecting information associated with the characteristic modulation of the visual stimulus in the neural signals, determining a point of focus of the user in the viewed image, wherein generating the stimulus further comprises: on the basis of determining the HSF map data does not fulfil a predetermined spatial frequency threshold, performing operations comprising: generating enhanced HSF map data, thereby introducing additional HSF stimulation in the visual stimulus; and applying a temporal modulation to the enhanced HSF map data.