Abstract
This paper introduces single pixel imaging (SPI) and its applications. SPI is an imaging method that
uses a bucket detector instead of a 2D detector like CCD or CMOS sensors. For detecting 2D
information, the illuminated light projected by a projector has spatial patterns. Because SPI is attractive
from the viewpoint of its simple setup, it is widely used in sensing or industrial applications and can be
categorized into analytical imaging (as SPI and compressive sensing) and correlation imaging (as ghost
imaging). In this paper, each particular feature and principle are introduced.
