  We use the Richardson-Lucy deconvolution algorithm to extract one dimensional
(1D) spectra from LAMOST spectrum images. Compared with other deconvolution
algorithms, this algorithm is much more fast. The practice on a real LAMOST
image illustrates that the 1D resulting spectrum of this method has a higher
SNR and resolution than those extracted by the LAMOST pipeline. Furthermore,
our algorithm can effectively depress the ringings that are often shown in the
1D resulting spectra of other deconvolution methods.
