投影机的不同问题

Question

我正在使用beamer它进行演示，遇到了不同的问题：

1. 在标题页中，我添加的背景图像没有覆盖整个框架：页眉仍然是白色的。
2. 标题/副标题背景和我的图像背景之间有一个空白，这是由标题/副标题背景从灰色到白色的渐变造成的。
3. 参考书目的格式很糟糕。

这是一个重现我的问题的 MVW：

\documentclass[aspectratio=1610]{beamer}

\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}

\usetheme{Darmstadt}
\usecolortheme{beaver}
\useoutertheme[subsection=false]{miniframes}

\usepackage{tikz}

\usepackage{graphicx}

\usepackage[style=philosophy-modern,hyperref,square,natbib,backend=bibtex]{biblatex}                                          
\addbibresource{Bibliography.bib}


\author[]{Author name here}
\title{\huge Cool title here\\ \large Ugly withe space on top of this frame}
\date{Date here}
\institute[]{Badass institution}

\begin{document}

\beamertemplatenavigationsymbolsempty

\usebackgroundtemplate{%
\makebox[\paperwidth][c]{\makebox[\paperheight][c]{\tikz\node[opacity=0.5]{\includegraphics[height=1\paperheight]{EPFL_LOG_col.pdf}};}}}

{
\setbeamertemplate{headline}{}
\setbeamertemplate{footline}{}
\beamertemplatenavigationsymbolsempty
\begin{frame}
    \maketitle
\end{frame}
}

\usebackgroundtemplate{%
\makebox[\paperwidth][c]{\tikz\node[opacity=0.05]{\includegraphics[height=\paperheight]{EPFL_LOG_mut_small.pdf}};}}

\section*{Introduction}
\subsection*{}
\begin{frame}
    \frametitle{Introduction}
    \framesubtitle{}

    Note the white space caused by the gradient from the title background to white. Citation: \citet{Citation}
\end{frame}

\begin{frame}[t,allowframebreaks]
    \frametitle{References}

    \printbibliography
\end{frame}

\end{document}

结果如下：

有可能修复这些问题吗？如果可以，如何修复？

Answer 1

1. 不要让这些嵌套的框变得过于复杂 - 因为您已经在使用tikz，您只需将图像放在页面的中心并指定其宽度和高度：

   \usebackgroundtemplate{%
       \begin{tikzpicture}[remember picture,overlay]
       \node[at=(current page.center),opacity=0.5] {
           \includegraphics[width=\paperwidth,height=\paperheight]{example-image-a}
       };
       \end{tikzpicture}
   }
   

2. 删除框架标题下方的阴影：

   \setbeamertemplate{frametitle}[default][colsep=-4bp,rounded=false,shadow=false]
   

3. 嗯，这是你使用的风格的错误，换一种吧。

---

\documentclass[aspectratio=1610]{beamer}

\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}

\usetheme{Darmstadt}
\usecolortheme{beaver}
\useoutertheme[subsection=false]{miniframes}

\setbeamertemplate{frametitle}[default][colsep=-4bp,rounded=false,shadow=false]


\usepackage{tikz}

\usepackage{graphicx}

\usepackage{filecontents}

\begin{filecontents*}{\jobname.bib}
    @book{Knu86,
        author = {Knuth, Donald E.},
        year = {1986},
        title = {The \TeX book},
    }
\end{filecontents*}

\usepackage[style=authoryear,hyperref,natbib]{biblatex}
\addbibresource{\jobname.bib}

\author[]{Author name here}
\title{\huge Cool title here\\ \large Ugly withe space on top of this frame}
\date{Date here}
\institute[]{Badass institution}

\begin{document}

    \beamertemplatenavigationsymbolsempty

    \usebackgroundtemplate{%
        \begin{tikzpicture}[remember picture,overlay]
        \node[at=(current page.center),opacity=0.5] {
            \includegraphics[width=\paperwidth,height=\paperheight]{example-image-a}
        };
        \end{tikzpicture}
    }

    {
        \setbeamertemplate{headline}{}
        \setbeamertemplate{footline}{}
        \beamertemplatenavigationsymbolsempty
        \begin{frame}
            \maketitle
        \end{frame}
    }

    \usebackgroundtemplate{%
        \begin{tikzpicture}[remember picture,overlay]
        \node[at=(current page.center),opacity=0.5] {
            \includegraphics[width=\paperwidth,height=\paperheight]{example-image-b}
        };
        \end{tikzpicture}
    }

    \section*{Introduction}
    \subsection*{}
    \begin{frame}
        \frametitle{Introduction}
        \framesubtitle{}

        Note the white space caused by the gradient from the title background to white. Citation: \citet{Citation}
    \end{frame}

    \begin{frame}[t,allowframebreaks]
        \frametitle{References}
        \nocite{*}
        \printbibliography
    \end{frame}

\end{document}