Object recognition for remarkably small field-of-view with speckles

Abstract

Object recognition conventionally requires a sufficiently large field of view that could fully encompass an object. However, we have discovered that, under coherent illumination, one can use a much smaller field of view for object recognition without loss of accuracy. This is because part of the speckle pattern related to an object contains some of its global information. Our approach can be applied to covert imaging and non-line-of-sight object recognition and image reconstruction.