Imaging multiple objects through scattering medium under strong background illumination

Speckle correlation imaging is a typical method to image through strongly scattering medium. However, limited by the optical memory effect range, this method is hard to image multiple objects that are randomly distributed on the object plane with strong background illumination. To solve this problem, we proposed a new method that allows to image multiple objects with strong background illumination. It consists of isolating speckle pattern of each object with an image difference process and eliminating the interference of the background noise with the principal components analysis (PCA) technique. Our method can realize imaging of more than two objects through the scattering medium, and compared with other methods, our method can provide better observations of the objects in the bright field scenarios.