  Ghost imaging is a non local imaging technology, which can obtain target
information by measuring the second-order intensity correlation between the
reference light field and the target detection light field. However, the
current imaging environment requires a large number of measurement data, and
the imaging results also have the problems of low image resolution and long
reconstruction time. Therefore, using orthogonal methods such as QR
decomposition, a variety of optimization methods for speckle patterns are
designed combined with Kronecker product,which can help to shorten the imaging
time, improve the imaging quality and image noise resistance.
