Method for determining an emotional state of a subject and associated device

A system for determining, at an evaluation time, an emotional state of a person immersed in an environment for the purpose of monitoring an emotional state of said person, comprising at least one sensor, at least one environment sensor, and a programmable device, said programmable device being configured to:

• a. receive, during all or part of a time period preceding the evaluation time, at least one first signal acquired by the at least one sensor, said first signal being representative of a first time sequence of behavioural and/or physiological attributes of the person during said time period;
• b. receive, during all or part of said time period, at least one second signal acquired by the at least one environment sensor, said second signal being representative of a second time sequence of a state of the environment during said time period;
• c. determine, based on the at least one first signal, a third time sequence of emotional signatures of the person during said time period, said third sequence forming a first set of emotional signatures of the person, each of the emotional signatures of the person of the third sequence being represented by a position in a space representative of the emotions;
• d. determine, based on the at least one current second signal, a fourth time sequence of signatures of the environment during said time period, said fourth sequence forming a second set of signatures of the environment, each of the signatures of the environment being represented by a position in said space representative of the emotions;
• e. determine a degree of similarity between the first set of emotional signatures of the person and the second set of signatures of the environment,
• f. determine the emotional state of the person at the evaluation time from the determined degree of similarity.

A computer-implemented method for determining, at an evaluation time, an emotional state of a person immersed in an environment for the purpose of monitoring an emotional state of said person, said method comprising the following steps of:

• g. receiving, during all or part of a time period preceding the evaluation time, at least one first signal acquired by the at least one sensor, said first signal being representative of a first time sequence of behavioural and/or physiological attributes of the person during said time period;
• h. receiving, during all or part of said time period, at least one second signal acquired by the at least one environment sensor, said second signal being representative of a second time sequence of a state of the environment during said time period;
• i. determining, based on the at least one first signal, a third time sequence of emotional signatures of the person during said time period, said third sequence forming a first set of emotional signatures of the person, each of the emotional signatures of the person of the third sequence being represented by a position in a space representative of the emotions;
• j. determining, based on the at least one current second signal, a fourth time sequence of signatures of the environment during said time period, said fourth sequence forming a second set of signatures of the environment, each of the signatures of the environment being represented by a position in said space representative of the emotions;
• k. determining a degree of similarity between the first set of emotional signatures of the person and the second set of signatures of the environment,
• l. determining the emotional state of the person at the evaluation time from the determined degree of similarity.