Elbit Systems has been granted a patent for a system and method that detects movement of non-line-of-sight (NLOS) objects outside the field of view of a camera. The system uses a movable camera to capture images of a visible object impacted by light scattered from the NLOS object. By registering the pixels of two images acquired from different camera positions, the system calculates target light intensity values and detects movement based on variations between the registered images. GlobalData’s report on Elbit Systems gives a 360-degree view of the company including its patenting strategy. Buy the report here.
According to GlobalData’s company profile on Elbit Systems, AR/VR head-up displays was a key innovation area identified from patents. Elbit Systems's grant share as of September 2023 was 51%. Grant share is based on the ratio of number of grants to total number of patents.
Detection of movement of non-line-of-sight objects
A recently granted patent (Publication Number: US11734834B2) describes a system and method for detecting movement of non-line-of-sight objects using a movable camera. The system includes a camera capable of capturing images of a visible object that is impacted by scattered light from the non-line-of-sight object. The camera obtains a sequence of successive images and registers them into a common coordinate system. This registration allows for the identification of the target within the images. The system then calculates target light intensity values for each registered image and detects movement within the space based on variations in these values.
The system may also include an inertial sensor affixed to the camera, which contributes to the registration process. The movable camera can be mounted on various platforms such as aircraft, ground vehicles, nautical vehicles, fixed surfaces, or even a person. If the camera is gimbaled, it allows for better stabilization and control of the line-of-sight to the visible object.
The processing circuitry of the system compensates for differences in sensitivity and offsets of pixels in the registered images before detecting movement. This compensation ensures accurate detection of movement by accounting for variations in light intensity values across the target area.
The patent also describes a method for detecting movement using the same principles as the system. The method involves obtaining a sequence of images, registering them into a common coordinate system, calculating target light intensity values, and detecting movement based on variations in these values. The method can also utilize an inertial sensor and compensate for pixel differences before detecting movement.
Overall, this patent presents a system and method for detecting movement of non-line-of-sight objects using a movable camera. By registering images and analyzing target light intensity values, the system can accurately detect movement within a given space. The technology has potential applications in various fields, including surveillance, navigation, and object tracking.