`\documentclass[9pt, a4paper, twoside, openright]{book}
\usepackage{graphicx}
\usepackage{latexsym}
\usepackage{amsfonts}
\usepackage{makeidx}
\usepackage[T1]{fontenc}
\usepackage[english,italian]{babel}
\usepackage{verbatim}
\usepackage{listings}
\usepackage{fancyvrb}
\usepackage{algorithm}
\usepackage{algpseudocode}
\usepackage{epigraph}
\usepackage{acronym}
\usepackage{booktabs}
\usepackage{color}
\usepackage[usenames,dvipsnames,svgnames,table]{xcolor}
\usepackage[breaklinks=true,colorlinks=true,urlcolor=Blue,citecolor=Blue,linkcolor=Red,bookmarks=true]{hyperref}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{esint}
\usepackage{textcomp}
\usepackage{graphicx}
\usepackage{graphics}
\usepackage{hyperref}
\usepackage{subfigure}
\usepackage[square, numbers, comma, sort&compress]{natbib}
\usepackage{multirow}
\usepackage{longtable}
\usepackage{caption}
\usepackage{enumerate}
\usepackage{emptypage}
\usepackage{morefloats}
\usepackage{lscape}
\usepackage{fancyhdr}
\setcounter{tocdepth}{2}
\setcounter{secnumdepth}{5}
\usepackage{epsfig}
\usepackage{booktabs}
\usepackage{tabularx}
\usepackage{rotating}
\usepackage{appendix}
\usepackage{listings}
\usepackage[biolinum]{quotchap}
% comando che uso per la cornice
\usepackage[Export]{adjustbox}
\adjustboxset{fbox=.3pt -0.2pt}
\begin{document}
% Figura che vorrei SENZA cornice
\begin{figure}[htbp]
\begin{center}
\includegraphics[angle=0, height=3.5cm]{img/logo.jpg}
\end{center}
\end{figure}
% da qui in poi voglio tutte le figure con la cornice
% esempi di altre figure (ma nel mio testo ce ne sono molte di più)
\begin{figure}[htbp]
\centering
\includegraphics[width=.90\textwidth]{img/sel.jpg}
\caption{The different classes of \textit{soft} and \textit{hard} errors collectively known as Single Event Effects. \cite{morgan}}
\label{fig: SEE}
\end{figure}
\begin{figure}[htbp]
\centering
\includegraphics[width=.70\textwidth]{img/fissioneB.png}
\caption{Fission of $^{10}$B induced by the capture of a neutron (commonly happened in SRAMs)}
\label{fig: boro10}
\end{figure}
\end{document}`
Spero che come esempio vada bene.
Grazie e ciao a tutti