如何在 tikz 节点中添加标题？

Question

如何为 tikz 图片添加标题？这是我的 latex 片段：

\documentclass{article}


\usepackage{graphicx}
\usepackage{tikz}
\usepackage[paperwidth=40cm,paperheight=16cm]{geometry}
\usepackage{atbegshi}% http://ctan.org/pkg/atbegshi
\AtBeginDocument{\AtBeginShipoutNext{\AtBeginShipoutDiscard}}


\geometry{
 left=5mm,
 right=5mm,
 top=5mm,
 bottom=5mm,
 }


\begin{document}
\begin{tikzpicture}
%real picture
\node[inner sep=0pt] (realcoccus) at (0,12)
    {\includegraphics[scale=0.3]{realcoccuscropped.png}};
\node[inner sep=0pt] (realbacillus) at (0,7)
    {\includegraphics[scale=0.3]{realbacilluscropped.png}};
\node[inner sep=0pt] (realspirillum) at (0,2)
    {\includegraphics[scale=0.22]{realspirillumcropped.png}};



\end{tikzpicture}
\end{document}

我想在每张图片下添加一个标题：

\node[inner sep=0pt] (realcoccus) at (0,12)
    {\includegraphics[scale=0.3]{realcoccuscropped.png}};

\caption

不起作用。添加文本看起来很糟糕。

如何添加字幕？

谢谢

Answer 1

您可以\captionof使用capt-of或者caption包并将标题放在所需宽度的节点内（我选择了\linewidth，但请进行最适合您需求的调整）；该positioning库用于轻松地将标题放置在图像下方：

代码：

\documentclass{article}
\usepackage{graphicx}
\usepackage{tikz}
\usetikzlibrary{positioning}
\usepackage{capt-of}

\begin{document}

\noindent\begin{minipage}{\linewidth}
\begin{center}
\begin{tikzpicture}
\node[inner sep=0pt] (realcoccus) at (0,12)
    {\includegraphics[scale=0.3]{example-image-a}};
\node[inner sep=0pt,below=\belowcaptionskip of realcoccus,text width=\linewidth]
    {\captionof{figure}{the first image}};
\node[inner sep=0pt] (realbacillus) at (0,7)
    {\includegraphics[scale=0.3]{example-image-b}};
\node[inner sep=0pt,below=\belowcaptionskip of realbacillus,text width=\linewidth]
    {\captionof{figure}{the second image}};
\node[inner sep=0pt] (realspirillum) at (0,2)
    {\includegraphics[scale=0.3]{example-image-c}};
\node[inner sep=0pt,below=\belowcaptionskip of realspirillum,text width=\linewidth]
    {\captionof{figure}{the third image}};
\end{tikzpicture}
\end{center}
\end{minipage}

\end{document}