A head-mounted electronic device may include a display with an optical combiner. The combiner may include a waveguide with first and second output couplers. The first output coupler may couple a first portion of image light at visible wavelengths out of the waveguide and towards an eye box. The second output coupler may couple a second portion of the image light at near-infrared wavelengths out of the waveguide and towards the surrounding environment. The second portion of the image light may include an authentication code that is used by a secondary device to authenticate the head-mounted device and/or may include a pattern that serves to prevent camera equipment in the surrounding environment from capturing accurate facial recognition information from a user while wearing the head-mounted device.

A head-mounted electronic device may include a display with an optical combiner. The combiner may include a waveguide with first and second output couplers. The first output coupler may couple a first portion of image light at visible wavelengths out of the waveguide and towards an eye box. The second output coupler may couple a second portion of the image light at near-infrared wavelengths out of the waveguide and towards the surrounding environment. The second portion of the image light may include an authentication code that is used by a secondary device to authenticate the head-mounted device and/or may include a pattern that serves to prevent camera equipment in the surrounding environment from capturing accurate facial recognition information from a user while wearing the head-mounted device.

This invention relates to a method of imaging a downhole region of interest. In particular this invention relates to a method of processing images captured downhole to remove or reduce distortions due to the optical system as a function of the temperature experienced by the optical system in the downhole environment. A method of imaging a downhole region of interest comprises contemporaneously capturing an image of a region of interest and recording a temperature associated with the region of interest; selecting a pre-defined set of distortion data from a plurality of pre-defined sets of distortion data based on the recorded temperature; and applying the selected set of distortion data to the captured image to create an un-distorted image, wherein the pre-defined set of distortion data comprises distortion values associated with a range of field angles at a specified temperature.

This invention relates to a method of imaging a downhole region of interest. In particular this invention relates to a method of processing images captured downhole to remove or reduce distortions due to the optical system as a function of the temperature experienced by the optical system in the downhole environment. A method of imaging a downhole region of interest comprises contemporaneously capturing an image of a region of interest and recording a temperature associated with the region of interest; selecting a pre-defined set of distortion data from a plurality of pre-defined sets of distortion data based on the recorded temperature; and applying the selected set of distortion data to the captured image to create an un-distorted image, wherein the pre-defined set of distortion data comprises distortion values associated with a range of field angles at a specified temperature.

A computer, including a processor and a memory, the memory including instructions to be executed by the processor to acquire a first image by illuminating a first object with a first light beam, determine a first measure of pixel values in the image and perform a comparison of the first measure of pixel values to a second measure of pixel values determined from a second image of a second object, wherein the second image is previously acquired by illuminating the second object with a second light beam. The instructions include further instructions to, when the comparison determines that the first measure is equal to the second measure of pixel values within a tolerance, determine that the first object and the second object are a same object.

A camera system. The camera system includes a sensor array; an infrared (IR) illumination system configured to emit active IR light in an IR light sub-band; a spectral illumination system configured to emit active spectral light in a spectral light sub-band; one or more logic machines; and one or more storage machines. The storage machines hold instructions executable by the one or more logic machines to address the sensor array to acquire an ambient image; based on at least the ambient image, activate the IR illumination system and address the sensor array to acquire an actively-IR-illuminated depth image; and based on at least the actively-IR-illuminated depth image, activate the spectral illumination system and address the sensor array to acquire an actively-spectrally-illuminated spectral image.

Various implementations disclosed herein include devices, systems, and methods that identify a gesture based on event camera data and frame-based camera data (e.g., for a CGR environment). In some implementations at an electronic device having a processor, event camera data is obtained corresponding to light (e.g., IR light) reflected from a physical environment and received at an event camera. In some implementations, frame-based camera data is obtained corresponding to light (e.g., visible light) reflected from the physical environment and received at a frame-based camera. In some implementations, a subset of the event camera data is identified based on the frame-based camera data, and a gesture (e.g., of a person in the physical environment) is identified based on the subset of event camera data. In some implementations, a path (e.g., of a hand) by tracking a grouping of blocks of event camera events in the subset of event camera data.

The present disclosure provides a display method, a computer storage medium, and a display device. The display method includes: detecting a frame image including a still image; accumulating a retention time of the still image in the frame image, the retention time is a time for uninterruptedly displaying the still image; determining whether the accumulated retention time is greater than a threshold value; sequentially shifting data of the frame image by n rows in response to that the accumulated retention time is greater than the threshold value, the threshold value is an accumulated value of the retention time when a line afterimage begins to appear on the still image; a row direction of the n rows is a scanning direction of the frame image; wherein 1≤n≤3N/4, N is a total number of rows scanned for one frame image, n is an integer, and 3N/4 is rounded to an integer.

A sensor including: a transmitter configured to transmit electromagnetic waves between 1 GHz and 300 GHz; a receiver configured to receive the electromagnetic waves from the transmitter, wherein the transmitter and receiver are positioned in relation to a subject to be scanned such that the receiver receives reflected electromagnetic waves; and a control station for processing the received reflected electromagnetic waves and determining movement of an individual. A method for determining movement of an individual including: transmitting electromagnetic waves between 1 GHz and 300 GHz to a subject to be scanned; receiving reflected electromagnetic waves from the subject; analyzing the electromagnetic waves and reflected electromagnetic waves to determine movement of the individual.

A sensor including: a transmitter configured to transmit electromagnetic waves between 1 GHz and 300 GHz; a receiver configured to receive the electromagnetic waves from the transmitter, wherein the transmitter and receiver are positioned in relation to a subject to be scanned such that the receiver receives reflected electromagnetic waves; and a control station for processing the received reflected electromagnetic waves and determining movement of an individual. A method for determining movement of an individual including: transmitting electromagnetic waves between 1 GHz and 300 GHz to a subject to be scanned; receiving reflected electromagnetic waves from the subject; analyzing the electromagnetic waves and reflected electromagnetic waves to determine movement of the individual.