Science Daily July 29, 2019
A team of researchers in the US (Stanford University, Carnegie Mellon University) builds upon previous around-the-corner cameras they developed. It is able to capture more light from a greater variety of surfaces, see wider and farther away and is fast enough to monitor out-of-sight movement. The powerful laser scans a wall opposite the scene of interest and that light bounces off the wall, hits the objects in the scene, bounces back to the wall and to the camera sensors. By the time the laser light reaches the camera only specks remain, but the sensor captures everyone, sending it along to a highly efficient algorithm that untangles these echoes of light to decipher the hidden tableau. It can reconstruct a scene at speeds of 60 frames per second on a computer with a graphics processing unit, which enhances graphics processing capabilities. Imaging objects outside a camera’s direct line of sight has important applications in robotic vision, remote sensing, and many other domains…read more. Video
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The imaging system records the time it takes for laser light to scatter off the wall, reflect off the hidden bunny, and return to the wall. By acquiring these timing measurements for different laser positions on the wall, the 3D geometry of the hidden object can be reconstructed. Credit: Stanford Computational LaboratoryÂ