\documentclass{article}
\usepackage{adjustbox}
\usepackage{graphicx}
\usepackage{xepersian}

\begin{document}
\title{بریدن (\lr{trim}) عکس با بسته‌ی \lr{adjustbox}}

\maketitle

\includegraphics[width=3cm]{chick}

\vskip 10mm

%trim option's parameter order: left bottom right top
\includegraphics[trim = 0mm 30mm 5mm 0mm, clip,width=3cm]{chick}
% این با زیلاتک کار نمی‌کنه.

\vskip 30mm


\adjustbox{trim = 0mm 30mm 5mm 0mm,clip,width=2cm}
{\includegraphics{chick}}
\hspace{20mm}
% or with newer versions of adjustbox:
\adjincludegraphics[trim = 0mm 30mm 5mm 0mm,clip,width=2cm]{chick}
\hspace{20mm}
% or
\adjustimage{trim = 0mm 30mm 5mm 0mm,clip,width=2cm}{chick}


\end{document}