documentclass{article}
usepackage{longtable}
% usepackage[left=0.2cm, right=1cm, top=2cm]{geometry}
title{A longtable example}

begin{document}
begin{center}
begin{longtable}{|p{2.5cm}|p{3cm}|p{2cm}|p{2cm}|p{2cm}|}
caption{Overview of papers including Image Compression Based On Deep
Learning Techniques} label{tab:long} \
hline
hline multicolumn{1}{c}{textbf{Activation }} &multicolumn{1}{c}
{textbf{Figure}} & multicolumn{1}{c}{textbf{Equation}} & multicolumn{1}
 {c}{textbf{Advantage}} & multicolumn{1}{c}{textbf{Advantage}}

   %& multicolumn{1}{c|}{textbf{Third column}} \ hline
 endfirsthead

multicolumn{5}{c}%
  {{bfseries tablename thetable{} -- continued from previous page}} \
  hline multicolumn{1}{c}{textbf{Equation}} & multicolumn{1}{c}
    {textbf{Advantage}} & multicolumn{1}{c}{textbf{Advantage}}
    % hline
     % & multicolumn{1}{c|}{textbf{Third column}} \ hline
   % endhead

      % hline multicolumn{3}{|r|}{{Continued on next page}} \ hline
     % endfoot

     hline
   endlastfoot
   hline
         % multicolumn{2}{c}{textbf{CNN Based Architectures}} \
      % hline
     textbf{Sigmoid}cite{sigmoid} 1995 & includegraphics[width=20mm]
     {sigmoid1.jpg}
    & $sigma(x)=frac{1}{1+e^{-x}}$  & Squashes numbers in the range [0,1]
   & begin{itemize} item Causes saturation by killing the gradients item
      Not zero centered which makes it impracticable to use item Exponential function is a bit expensive function making it infeasible to use in practice end{itemize} \
     end{longtable}
    end{center}
  end{document}