US 11,864,895 B2
Lie detector based on monitoring of pupil dilation
Daphna Palti-Wasserman, Haifa (IL); Arik Lilling, Mazkeret Batya (IL); Ofek Wasserman, Haifa (IL); Neta Lerman, Haifa (IL); Benny Karov, Ramat Hasharon (IL); and Maayan Wasserman, Haifa (IL)
Assigned to Eye-Minders Ltd., Haifa (IL)
Filed by Eye-Minders Ltd., Haifa (IL)
Filed on Apr. 30, 2020, as Appl. No. 16/863,545.
Prior Publication US 2021/0338125 A1, Nov. 4, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G06V 40/19 (2022.01); A61B 5/16 (2006.01); A61B 5/00 (2006.01)
CPC A61B 5/164 (2013.01) [A61B 5/163 (2017.08); A61B 5/741 (2013.01)] 29 Claims
OG exemplary drawing
 
1. An apparatus for evaluating whether a testee is being deceptive, the apparatus comprising:
an image sensor configured to capture a plurality of sequential images of the testee's pupil;
a processor configured to determine a size of the testee's pupil in the plurality of sequential images;
a circuit that generates an audio output; and
a controller programmed to control the circuit so that the circuit outputs an audio signal corresponding to a set of sentences, wherein the set of sentences includes an initial sentence and at least three first-type sentences, wherein each of the first-type sentences is expected to evoke significant pupil dilation in a testee who is being deceptive and not to evoke significant pupil dilation in a testee who is not being deceptive, and wherein the initial sentence is output prior to the outputting of the first-type sentences,
wherein the controller is further programmed to monitor changes in the determined size of the testee's pupil during the outputting of the first-type sentences and during any responses to the first-type sentences made by the testee,
wherein the controller is further programmed to compare changes in the determined size of the testee's pupil in response to each of the first-type sentences to ascertain whether a pupil-dilation response to each respective one of the first-type sentences is at least 10% larger than a pupil-dilation response to at least two of the other first-type sentences, and
wherein the controller is further programmed to output an indication of deceptiveness or non-deceptiveness for at least one of the first-type sentences based on a result of the ascertaining,
wherein the first-type sentences are all in the same language,
wherein the average volume of each of the portions of the audio signal that corresponds to each of the first-type sentences are all within 10 dB of each other,
wherein each of the first-type sentences has a duration of less than 5 s, and
wherein gaps of at least 3 s are interposed between adjacent sentences within the set of sentences.