Vertical alignment of subfigures LATEX

Question

I am working on my thesis and I am struggling with placing 2 images next to each other, so that the second image would be centered vertically along the first one. I was also try

Answer 1

Edit: it seems like subfig package has problems, particularly when working with hyperref. In that case, try subcaption package as mentioned in this answer.

If you use subfig package, you can do this easily. The solution is in section 5.4 of the manual:

\newsavebox{\tempbox}
\begin{figure}[H]
\sbox{\tempbox}{\includegraphics[width=0.28\textwidth]{sparsesmall}}
\subfloat[sparse($\mathbf{A}$)]{\usebox{\tempbox}\label{sparse}}%
\qquad
\subfloat[full($\mathbf{A}$)]{\vbox to \ht\tempbox{%
  \vfil
  \includegraphics[width=0.55\textwidth]{fullsmall}
  \vfil}\label{full}}%
  \caption{Representation of $\mathbf{A}$ in MATLAB}\label{schematic}
\end{figure}

I haven't tested it, and there may be typos, but it should work.