  Computational ghost imaging (CGI) and single-pixel camera (SPC) are two types
of single-pixel imaging and attracts increasing interest in recent years. The
performance differences of CGI and SPC in difference light disturbance
environment are investigated. In comparison with CGI, we demonstrate that the
quality of SPC is always better in the same conditions and local light
disturbance has a larger influence to CGI/SPC than global light disturbance. In
addition, a method to improve the reconstruction result of SPC is proposed if
the source's energy is unstable and there is light disturbance in the detection
process, and its validity is also verified by numerical simulation.
