Abstract: Data about concentration of one or more types of molecules present within a human body are determined noninvasively using radio frequency signals. These signals generated at very low power levels are emitted and acquired using an antenna mounted to a wearable device. Information about changes to the signals is indicative of the concentration of one or more types of molecules within the user. The antenna includes two or more elements with a varying distance between them which reduces or eliminates power reflection and improves overall efficiency. The varying distance provides a first impedance at terminals of the antenna and a second impedance elsewhere on the antenna, such as midway along a long axis of the antenna. The first impedance matches an impedance of a transmitter output, a receiver input, or both. The second impedance results in the signal extending away from the antenna towards the user.

Abstract: Systems, devices, and methods are provided for detecting and correcting eating behavior. A device may receive audio data, determine that the audio data is indicative of consumption of a product by a user. The device may determine, based on the product, a measureable attribute associated with the user. The device may receive first data associated with the measureable attribute. The device may determine that the first data exceeds a threshold. The device may generate a message for presentation.

Abstract: A user may be authenticated at a device through analyzing video frames of acquired video data. Feature recognition may be used to determine that features in the video frames correspond to features of an authorized user. Moreover, successive frames of the video frames may be compared to determine whether the video data is representative of a video capturing the user, or a representation of the user, such as a digital image of or a video depicting the user.

Abstract: A camera sensitive to near infrared light is placed proximate to the skin of a user and the area illuminated by one or more infrared light sources. A set of images of one or more blood vessels is obtained at successive times. The images are processed to determine a change in size of the vessel(s) from one time to another, corresponding to expansion and contraction of the vessels responsive to contraction of the user's heart. This change may be used to determine pulse rate, elasticity of the vessel, blood pressure, or other data about the user's physiological status. The data may be used to assess health status at a particular time, determine health trends for the user, and so forth.

Abstract: An imaging system for general illumination and range imaging in strong ambient illumination conditions includes a light source, at least one image sensor with a rolling shutter, a steering device, and a controller. The light source transmits laser pulses with a structured pattern towards a scene. The steering apparatus spatially directs each of the laser pulses towards a different region of interest within the scene. The image sensor receives reflected laser pulses, via the rolling shutter, from the different regions of interest. The controller triggers the image sensor to read each of the pixels in the image sensor with the rolling shutter at a time instance when one of the laser pulses having the structured pattern is reflected onto the pixel from one of the different regions of interest.

Abstract: An imaging system for general illumination and range imaging in strong ambient illumination conditions includes a light source, at least one image sensor with a rolling shutter, a steering device, and a controller. The light source transmits laser pulses with a structured pattern towards a scene. The steering apparatus spatially directs each of the laser pulses towards a different region of interest within the scene. The image sensor receives reflected laser pulses, via the rolling shutter, from the different regions of interest. The controller triggers the image sensor to read each of the pixels in the image sensor with the rolling shutter at a time instance when one of the laser pulses having the structured pattern is reflected onto the pixel from one of the different regions of interest.

Abstract: This disclosure describes techniques to compensate for changes in a depth of field of a camera caused by changes in orientation of the camera (e.g., tilt) and changes in the temperature of the camera. For instance, the described techniques may utilize an actuator, such as a voice-coil motor, of the camera to adjust an image distance of the camera lens to compensate for changes in the depth of field of the camera caused by changes in the orientation of the camera and/or changes in temperature of the camera. One or more models may be generated using calibrated input current values for the voice-coil motor which indicate, for various changes in orientation and temperature of the camera, input current values to cause the voice-coil motor to adjust the image distance of the camera to maintain the desired depth of field.

Abstract: An occurrence of an event triggering a dynamic recalibration of cameras in a computing device can be detected. In response, respective images of an object can be acquired using each of at least three cameras in the computing device at approximately a same time. Using at least three distinct pairs of the at least three cameras, a respective apparent distance between the computing device and the object can be determined. The respective apparent distances can be analyzed to isolate at least one misaligned camera.

Abstract: A decision engine executing on an electronic device may determine, using sensor data captured by multiple sensors of the device, whether a user is present in an environment that includes the device. If the user is determined to be present in the environment, the device may transition from a first state to a second state. The first state may be a first power state of the device in which the device is powered off or an idle or dormant state in which the device is powered on but a display of the device is powered off. Correspondingly, the second state may be a second power state of the device in which the device and the display are powered on and content is being rendered on the display. If the decision engine cannot make a determination based on the sensor data, a context engine may adjudicate the user presence determination.

Abstract: Technologies are described herein for determining calibration settings for displaying content on a monitor. A user may use a mobile computing device to determine calibration settings for a monitor. A calibration tool on the mobile computing device causes one or more calibration images to be displayed on the monitor. The calibration images are used to determine settings related to gamma, brightness, contrast, color settings, and the like that are associated with the monitor. After a calibration image is displayed, the calibration tool utilizes a camera on the mobile computing device to capture an image of the calibration image. The calibration tool analyzes the captured image data to determine calibration settings for the monitor. The calibration tool may apply the calibration settings directly to the monitor or might adjust image data before the image data is displayed.

Abstract: High dynamic range images are generated using conventional dynamic range cameras. A first camera is configured with exposure settings that are optimized for brighter regions, while a second camera assembly is optimized for darker regions. The cameras can be rectified and can capture concurrently such that objects are relatively aligned, with global and local misregistrations being minimized. The image data is analyzed to determine regions where the image data from one camera or the other provides higher quality, such as where the brightness values fall between a noise floor and a saturation level. If image data from both sets have values within that range then the values can be combined, such as with a weighted average. A composite image is generated that includes more uniform color and brightness than in either image individually, or that could have been captured using a single camera of similar cost and capabilities.

Abstract: Approaches are described for managing the capture and/or presentation of images, such as panorama images. An electronic device can be used to “paint” the scene desired to be captured, where the device can be panned horizontally or vertically, or both, to capture images of a much larger area than the field of view of the camera. The overlap between adjacent images can be determined image-by-image and visual or other cues can be provided to assist a user controlling the device to pan the device in a particular manner to ensure an appropriate amount of overlap between captured images. Further, the user can be presented the entire panorama image being captured at the highest scale possible by filling the display element of the device with the image and dynamically scaling down the image as the user continues to add to the panorama image.

Abstract: Approaches are described for managing the capture and/or presentation of images, such as panorama images. An electronic device can be used to “paint” the scene desired to be captured, where the device can be panned horizontally or vertically, or both, to capture images of a much larger area than the field of view of the camera. The overlap between adjacent images can be determined image-by-image and visual or other cues can be provided to assist a user controlling the device to pan the device in a particular manner to ensure an appropriate amount of overlap between captured images. Further, the user can be presented the entire panorama image being captured at the highest scale possible by filling the display element of the device with the image and dynamically scaling down the image as the user continues to add to the panorama image.

Abstract: A field of view (FOV) extender may include prisms that direct light from an angle outside of an angle of view associated with a lens of camera, onto the image sensor of the camera, thereby piecewise extending the field of view of the camera beyond the unaltered angle of view of the camera. The prisms may be oriented to direct light around an outer region of the image sensor, which may generate signals use for motion detection purposes. Each prism may be spaced apart from an adjacent prism by a gap, which may create an alternating sequence of prisms and gaps. An inner region of the image sensor may capture imagery that may be suitable for output to a user.

Abstract: Described are techniques and systems for providing authentication credentials associated with a user. The user is authenticated using one or more techniques, such as multi-factor authentication using one or more biometric characteristics, biomedical data, passwords, and so forth, to generate authentication data. The authentication data may be used in conjunction with information about a wearable device (“wearable”), such as a wristband. Authentication may be confirmed upon an indication that the wearable has not been removed, tampered with, and so forth. In some implementations the wearable device may store and distribute the authentication credentials to requesting devices so long as the wearable has not been removed, tampered with, and so forth.

Abstract: A computing device can determine its position relative to a reference point. The device can render a portion of content too large to be suitably displayed in full on a display of the device. The device can render the content in full to appear (i.e., can virtually position the entire content) to be located in a stationary position relative to the reference point. The device can detect a change to its position, such as a movement of the device caused by a user of the device. Based on the detected change to the device's position, the device can modify which portion of the entire content to render. The rendered portion of the entire content can change corresponding to where and how the device moves.

Abstract: Images captured at short distances, such as “selfies,” can be improved by addressing magnification and perspective effects present in the images. Distance information, such as a three-dimensional depth map, can be determined for an object using stereoscopic imaging or another distance measuring approach. Based on a magnification function determined for a camera lens, magnification levels for different regions of the captured images can be determined. At least some of these regions then can be adjusted or transformed in order to provide for a more consistent magnification levels across those regions, thereby reducing anamorphic effects. Where appropriate, gaps in the image can also be filled to enhance the image. At least some control over the amount of adjustment may be provided to users for aesthetic control.

Abstract: Approaches are described for managing the processing of image or video data captured by a portable computing device. The device provides a set of images to a remote server executing “in the cloud”. The set of images can include a reference image and at least one other image captured subsequent or prior to the reference. Upon receiving the set of images at the remote server operating, the remote server can process the images to determine a similarity between the reference image and each of the other images. Thereafter, each image having a similarity value above a similarity value threshold can be aligned with the reference image, and the pixel values for corresponding locations in each of the images can be combined to create a processed image. The processed images can be provided to the computing device from the remote server, where the user can decide to accept or discard the image.

Abstract: A computing device can determine its position relative to a reference point. The device can render a portion of content too large to be suitably displayed in full on a display of the device. The device can render the content in full to appear (i.e., can virtually position the entire content) to be located in a stationary position relative to the reference point. The device can detect a change to its position, such as a movement of the device caused by a user of the device. Based on the detected change to the device's position, the device can modify which portion of the entire content to render. The rendered portion of the entire content can change corresponding to where and how the device moves.

Abstract: Approaches are described which enable a user of a computing device (e.g., mobile phone, tablet computer) to capture a first image using the front-facing camera and then use that first image to guide the capturing of a second image (e.g., a higher quality image) using the rear-facing camera of the device. When the user turns the device around, the first image is used as a model template to guide the user in moving and/or rotating the device to align the rear-facing camera for capturing the second image.