I've got the following code in a document and am at a loss trying to figure out how I can correctly pad the cells and/or align the equations correctly.
\begin{table}[h]
\begin{tabularx}{\columnwidth}{ |X|l| }
\hline
\textbf{Measurement} & \textbf{Equation} \\
\hline \hline
Euclidean distance between the shape model parameters vector for all landmarks $b$ and without the current landmark $b'$ & $\|b-b'\|$ \\
\hline
Average point-wise distance between the matched shape for all landmarks $\bar{x}$ and without the current landmark $\bar{x'}$ & $\displaystyle \frac{\sum_{i=1}^{3(m-1)}\bar{x}_i-\bar{x'}_i}{3(m-1)}$\\
\hline
\end{tabularx}
\caption{Landmark influence measurements.}
\label{tab:1}
\end{table}
This gives me the following output:
Whereas I'd much prefer something like this:
As you can see, the differences are the vertical padding of the left column and the alignment of the equations in the right column. Can someone point me in the proper direction on this one?