\documentclass[a4paper,openany,14pt]{book}

\usepackage[top=30mm,bottom=25mm,left=25mm,right=30mm,
includehead=true,includefoot=true]{geometry}

\usepackage{subfigure}
\usepackage[subfigure]{tocloft}

%\usepackage{caption}

%\usepackage[font=Large,labelfont=Large]{caption}
\usepackage[font=large]{caption}


\usepackage[colorlinks=false,linkbordercolor={1 1 1},pdfborder = {0 0 0}]{hyperref}[2010/09/11]

\usepackage{tocbibind}


\usepackage{amsmath}
\usepackage{tikz}
\usetikzlibrary{calc}

\usepackage{fancyhdr}
\pagestyle{fancy}

\usepackage{titlesec}

\usepackage{bidiftnxtra}
\usepackage{footmisc}
\usepackage{indentfirst}
\usepackage{graphicx}

\usepackage{setspace}


\usepackage{xepersian}

\settextfont[Scale=1]{B Nazanin}
\setlatintextfont[Scale=0.86]{Times New Roman} % 11pt

\titlespacing*{\chapter}{0pt}{10pt}{1pt}
\titlespacing*{\section}{0pt}{1pt}{4pt}
\titlespacing*{\subsection}{0pt}{1pt}{4pt}


\DeclareMathOperator*{\argmin}{\arg\min}   

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\fancyhead{}
%\fancyfoot{}
\fancyhead[R]{\leftmark}
\fancyhead[L]{\thepage}
%\fancyfoot[C]{\thepage}

\renewcommand{\headrulewidth}{2pt}
%\renewcommand{\footrulewidth}{2pt}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\makeatletter
\newcommand*{\Computebaselinestretch}[1]{%
  \strip@pt\dimexpr\number\numexpr\number\dimexpr#1\relax*65536/\number\dimexpr\baselineskip\relax\relax sp\relax
}
\makeatother
\linespread{\Computebaselinestretch{1.15cm}}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\renewcommand\cftchappagefont{\fontsize{14pt}{15pt}\selectfont}
\renewcommand\cftsecpagefont{\fontsize{14pt}{15pt}\selectfont}
\renewcommand\cftsubsecpagefont{\fontsize{14pt}{15pt}\selectfont}

\renewcommand{\cftchapfont}{\fontsize{14pt}{15pt}\selectfont}
\renewcommand{\cftsecfont}{\fontsize{14pt}{15pt}\selectfont}
\renewcommand{\cftsubsecfont}{\fontsize{14pt}{15pt}\selectfont}

\renewcommand\thesubfigure{\fontsize{18pt}{18pt}\selectfont(\alph{subfigure})}

\renewcommand{\cfttoctitlefont}{fontsize{18pt}{20pt}\selectfont} 

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\begin{document}

\renewcommand{\bibname}{مراجع}



\newpage
\pagenumbering{arabic}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\newpage
\thispagestyle{plain}

\restoregeometry
\newgeometry{top=30mm,bottom=25mm,left=25mm,right=30mm}


\pagenumbering{alph}

\newpage

{\large\tableofcontents}

\newpage

{\large\listoffigures}
%\listoftables

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\newpage
\pagenumbering{arabic}

\fontsize{14}{15}\selectfont \chapter{مقدمه}

این یک مثال است 
این یک مثال است 
این یک مثال است 
این یک مثال است 
این یک مثال است 
این یک مثال است 
این یک مثال است 
این یک مثال است 
این یک مثال است.

\vspace{1cm}

\begin{figure}[h]
\centering
\label{fig:accident_injuries}
\includegraphics[scale=1.4]{example.png}
\caption{\fontsize{12}{14}\selectfont
 این یک مثال است 
} 
\end{figure}


این یک مثال است 

\end{document}