deletions | additions       diff --git a/figures/fig1/caption.tex b/figures/fig1/caption.tex  index ab50a18..474c800 100644  --- a/figures/fig1/caption.tex  +++ b/figures/fig1/caption.tex 
...
\label{fig1} (a) Schematic diagram of the data acquisition setup. (b) Total imaged area of USAF test pattern. (c) A frame An 80$\times$80-pixel area  of a  raw data frame  with single-photon events. (d) 3D representation of (c).