Abstract: Often the physiological and emotional state of a person can be associated with certain cortical activity that can cause certain thermal patterns on the person's forehead. Thus, thermal measurements of the forehead may be used to differentiate between user states. In one embodiment, a system includes at least one inward-facing head-mounted thermal camera (CAM) that takes thermal measurements of at least first and second regions on the right side of a user's forehead (THR1 and THR2, respectively), and thermal measurements of at least third and fourth regions on the left side of the forehead (THL1 and THL2, respectively). The middles of the first and third regions are at least 1 cm above the middles of the second and fourth regions, respectively. The system also includes a computer that determines, based on THR1, THR2, THL1, and THL2, whether the user is in a normal state or an abnormal state.

Abstract: Described herein are systems and methods for selecting a stressor based on thermal measurements. In one embodiment, a system includes an inward-facing head-mounted thermal camera (CAM) and a computer. CAM takes thermal measurements of a region on a periorbital area (THROI1) of the user. The computer detects extents of stress based on THROI1, receives indications of potential stressors to which the user was exposed while THROI1 were taken, and selects the stressor, from among the potential stressors, based on the indications and the extents. Optionally, during most of the time the user was affected by the stressor, the effect of the stressor, as manifested via changes to THROI1, was higher than the effects of most of the potential stressors. Optionally, thermal measurements of other regions on the face may also be utilized to detect the extents of stress.

Abstract: Described herein are systems and methods for detecting a physiological response based on thermal measurements while accounting for effects of the environment. In one embodiment, a system includes an inward-facing head-mounted thermal camera (CAMin) that takes thermal measurements of a region of interest (THROI) on a user's face, and an outward-facing head-mounted thermal camera (CAMout) that takes thermal measurements of the environment (THENV). CAMin does not occlude the region of interest, and the system further includes a computer that detects the physiological response based on THROI and THENV. Optionally, the computer generates feature values based on sets of THROI and THENV, and utilizes a machine learning-based model to detect, based on the feature values, the physiological response.

Abstract: Brain activity, and in particular which hemisphere is relatively more effective, is correlated with the dominant nostril (i.e., the nostril through which most of the air is exhaled when breathing through the nose). Since each side of the brain plays a different role in different types of activities, it may be better to conduct certain activities when a certain nostril is dominant. Described herein are systems and methods for suggesting activities according to the dominant nostril. In one embodiment, a system includes a sensor and a computer. The sensor takes measurements of a user that are indicative of the user's dominant nostril. The computer predicts, based on the measurements, which of the user's nostrils will be the dominant nostril at a future time and may suggest having a suitable activity accordingly.

Abstract: Described herein are systems and methods for detecting a physiological response based on thermal measurements while accounting for consumption of a confounding substance such as a medication, alcohol, caffeine, or nicotine. In one embodiment, a system includes a computer and an inward-facing head-mounted thermal camera (CAM) that takes thermal measurements of a region of interest (THROI) on a user's face. The computer receives an indication indicative of the user consuming a confounding substance that affects THROI, and detects the physiological response while the consumed confounding substance affects THROI. The detection is based on THROI, the indication and a model. Optionally, the model was trained on: a first set of THROI taken while the confounding substance affected THROI, and a second set of THROI taken while the confounding substance did not affect THROI.

Abstract: Described herein are systems and methods for detecting a physiological response based on multispectral data. In one embodiment, a system includes an inward-facing head-mounted thermal camera (CAM) that takes thermal measurements of a first region of interest (THROI1) on a user's face, and an inward-facing head-mounted visible-light camera (VCAM) that takes images of a second region of interest (IMROI2) on the face. The first and second regions of interest overlap, and the system includes a computer that detects the physiological response based on THROI1, IMROI2, and a model. Optionally, the model was trained based on previous THROI1 and IMROI2 of the user taken during different days. Optionally, the physiological response is indicative of an occurrence of an emotional state of the user, such as joy, fear, sadness or anger.

Abstract: Described herein are systems and methods for personalized detection of an allergic reaction of a user. In one embodiment, a system includes an inward-facing head-mounted thermal camera (CAM) and a computer. CAM takes thermal measurements of a region on the nose (THN) of a user. The computer generates feature values based on THN and utilizes a model to detect an allergic reaction of the user based on the feature values. The model is trained based on previous THN of the user taken during different days. Some embodiments may utilize additional thermal cameras that take thermal measurements of other regions on the face, which may be utilized by the computer to generate additional feature values that are used to detect the allergic reaction. In some cases, detection of the allergic reaction may occur following a rise in nasal temperature, even before the user becomes aware of the allergic reaction.

Abstract: Brain activity, and in particular which hemisphere is relatively more effective, is correlated with the dominant nostril (i.e., the nostril through which most of the air is exhaled when breathing through the nose). Thus, identifying which of the nostrils is dominant may have various applications. Described herein are systems and methods for identifying the dominant nostril. In one embodiment, a system includes at least one inward-facing head-mounted thermal camera (CAM) and a computer. The at least one CAM does not occlude any of the user's mouth and nostrils and is used to take thermal measurements of first and second regions below the right and left nostrils (THROI1 and THROI2, respectively). The computer identifies the dominant nostril based on THROI1 and THROI2. Optionally, the computer detects, utilizing THROI1 and THROI2, the three-dimensional (3D) shape of the exhale stream from at least one of the nostrils.

Abstract: One aspect of this disclosure involves a wearable device that includes a frame that is worn on a user's head, and an inward-facing camera (camera) physically coupled to the frame. The optical axis of the camera is either above the Frankfort horizontal plane and pointed upward to capture an image of a region of interest (ROI) above the user's eyes, or the optical axis is below the Frankfort horizontal plane and pointed downward to capture an image of an ROI below the user's eyes. The camera includes a sensor and a lens. The sensor plane is tilted by more than 2° relative to the lens plane according to the Scheimpflug principle in order to capture a sharper image. The Scheimpflug principle is a geometric rule that describes the orientation of the plane of focus of a camera when the lens plane is tilted relative to the sensor plane.

Abstract: Wearable devices for taking symmetric thermal measurements. One device includes first and second thermal cameras physically coupled to a frame worn on a user's head. The first thermal camera takes thermal measurements of a first region of interest that covers at least a portion of the right side of the user's forehead. The second thermal camera takes thermal measurements of a second ROI that covers at least a portion of the left side of the user's forehead. Wherein the first and second thermal cameras are not in physical contact with their corresponding ROIs, and as a result of being coupled to the frame, the thermal cameras remain pointed at their corresponding ROIs when the user's head makes angular movements.

Abstract: A wearable system configured to collect thermal measurements related to respiration. The system includes a frame configured to be worn on a user's head, and at least one non-contact thermal camera (e.g., thermopile or microbolometer based sensor). The thermal camera is small and lightweight, physically coupled to the frame, located close to the user's face, does not occlude any of the user's mouth and nostrils, and is configured to take thermal measurements of: a portion of the right side of the user's upper lip, a portion of the left side of the user's upper lip, and a portion of the user's mouth. The thermal measurements are forwarded to a computer that calculates breathing related parameters, such as breathing rate, an extent to which the breathing was done through the mouth, an extent to which the breathing was done through the nostrils, and ratio between exhaling and inhaling durations.

Abstract: This disclosure describes various systems for collecting thermal measurements of regions of a user's face. Each of the systems includes a frame configured to be worn on the user's head, and one or more lightweight thermal cameras that are coupled to the frame and configured to take thermal measurements of a region of interest on the user's face. Due to their coupling to the frame, the thermal cameras remain pointed at their respective regions of interest event when the user's head performs angular movements. The thermal measurements collected by some embodiments of the systems described herein may be utilized for a variety of applications that involve detecting different types of physiological responses or medical disorders.

Abstract: Described herein are systems, methods, and computer programs for detecting an allergic reaction. In one embodiment, a system configured to detect an allergic reaction of a user, includes: a frame configured to be worn on the user's head; a thermal camera, weighing less than 5 g, physically coupled to the frame, located less than 10 cm away from the user's face, and configured to take thermal measurements of at least part of the user's nose (THN); and a circuit configured to determine an extent of the allergic reaction based on THN.

Abstract: Wearable devices for taking symmetric thermal measurements. One device includes first and second thermal cameras physically coupled to a frame worn on a user's head. The first thermal camera takes thermal measurements of a first region of interest that covers at least a portion of the right side of the user's forehead. The second thermal camera takes thermal measurements of a second ROI that covers at least a portion of the left side of the user's forehead. Wherein the first and second thermal cameras are not in physical contact with their corresponding ROIs, and as a result of being coupled to the frame, the thermal cameras remain pointed at their corresponding ROIs when the user's head makes angular movements.

Abstract: Wearable devices for taking symmetric thermal measurements. One device includes first and second thermal cameras physically coupled to a frame worn on a user's head. The first thermal camera takes thermal measurements of a first region of interest that covers at least a portion of the right side of the user's forehead. The second thermal camera takes thermal measurements of a second ROI that covers at least a portion of the left side of the user's forehead. Wherein the first and second thermal cameras are not in physical contact with their corresponding ROIs, and as a result of being coupled to the frame, the thermal cameras remain pointed at their corresponding ROIs when the user's head makes angular movements.