A device and method of obtaining a depth of a space are provided. The method includes obtaining a plurality of images by photographing a periphery of a camera a plurality of times while sequentially rotating the camera by a preset angle, identifying a first feature region in a first image and an n-th feature region in an n-th image, the n-th feature region being identical with the first feature region, by comparing adjacent images between the first image and the n-th image from among the plurality of images, obtaining a base line value with respect to the first image and the n-th image, obtaining a disparity value between the first feature region and the n-th feature region, and determining a depth of the first feature region or the n-th feature region based on at least the base line value and the disparity value.

An eyewear device that adjusts an on time and an off time of a pair of cameras to control heat of the cameras and of the eyewear device. Each of the pair of cameras has a duty cycle determining when the respective camera is on and off. A camera control chart contains the duty cycles. The eyewear may have a temperature sensor such that the on and off times of the cameras are a function of the temperature sensor.

An eyewear device that adjusts an on time and an off time of a pair of cameras to control heat of the cameras and of the eyewear device. Each of the pair of cameras has a duty cycle determining when the respective camera is on and off. A camera control chart contains the duty cycles. The eyewear may have a temperature sensor such that the on and off times of the cameras are a function of the temperature sensor.

Embodiments include a method for self-rectification of a stereo camera, wherein the stereo camera comprises a first camera and a second camera, the method comprises creating image pairs from a first images taken by the first camera and second images taken by the second camera, respectively, such that each image pair comprises two images taken at essentially the same time by the first camera and the second camera, respectively. The method comprises creating, for each image pair, matching point pairs from corresponding points in the two images of each image pair, such that each matching point pair comprises one point from each of the first and second image of the respective image pair. For each matching point pair, a disparity is calculated and a plurality of disparities is created for each image pair, and the resulting plurality of disparities is taken into account for the self-rectification.

An apparatus is described that includes an integrated two-dimensional image capture and three-dimensional time-of-flight depth capture system. The three-dimensional time-of-flight depth capture system includes an illuminator to generate light. The illuminator includes arrays of light sources. Each of the arrays is dedicated to a particular different partition within a partitioned field of view of the illuminator.

A method for determining the complex amplitude of the electromagnetic field associated with a scene, comprising a) capturing a plurality of images of the scene by means of a photographic camera, the images being focused in planes of focus arranged at different distances, wherein the camera comprises a lens of focal length F and a sensor arranged at a certain distance from the lens in its image space, taking at least one image pair from the plurality of images and determining the accumulated wavefront to the conjugate plane in the object space corresponding to the intermediate plane with respect to the planes of focus of the two images of the pair.

An image calibration inspection tool includes: a plurality of substantially rectangular markers, two orthogonal sides of which are connected by an arc-shaped curve; and a calibration chart in which the plurality of markers are formed on a metal plate through machining, laser marking, or the like, wherein two of the markers in a diagonal direction are separated by a predetermined distance.

A special test target may enable standardized testing of performance of image based depth measuring systems. In addition, the error in measured depth with respect to the ground truth may be used as a metric of system performance. This test target may aid in identifying the limitations of the disparity estimation algorithms.

Stereo imaging systems and devices are disclosed. A stereo imaging system can include one or more stereo imaging modules and an image processing module connected to the one more stereo imaging modules by a coaxial cable that carries two-way communication signals and transfers electrical power from the image processing module to the stereo imaging modules. The stereo imaging modules each include a plurality of image sensors positioned to capture images of at least partially overlapping fields of view, and processing circuitry configured to transmit the captured images to the stereo imaging module via the coaxial cable. The processing module includes processing circuitry configured to receive and process the captured images, and power circuitry configured to provide electrical power to the stereo imaging module via the coaxial cable. The plurality of image sensors may be color image sensors configured to collect color images for stereo image processing.

Techniques for aligning images generated by an integrated camera physically mounted to an HMD with images generated by a detached camera physically unmounted from the HMD are disclosed. A 3D feature map is generated and shared with the detached camera. Both the integrated camera and the detached camera use the 3D feature map to relocalize themselves and to determine their respective 6 DOF poses. The HMD receives the detached camera's image of the environment and the 6 DOF pose of the detached camera. A depth map of the environment is accessed. An overlaid image is generated by reprojecting a perspective of the detached camera's image to align with a perspective of the integrated camera and by overlaying the reprojected detached camera's image onto the integrated camera's image.