Distance measurement by computational ghost imaging

Computational ghost imaging is quite different from the conventional thermal ghost imaging. The computational ghost imaging uses only a single-pixel sensor and omits the reference arm. We achieve the distance measurement by the computational ghost imaging and compute the field at any distance. We also correlate with the single-pixel sensor's intensities to obtain the ghost image. Using the "sobel" operator to detect the image edge and defining the effective edge pixel rate, we search the sharpest image to determine the object's location. This approach can not only measure the distance of the target, but also gain the distribution of the object.