[Tex/LaTex] How to add a gradient fade-out effect to an image

backgroundsbeamergraphicstikz-pgf

I am working on a presentation in beamer and would like to put a logo in the background of the title page with a gradient fade-out effect, similar to the image below. The logo is in PDF format and is in full-shape.

enter image description here

Best Answer

With WriteLaTeX's frog.jpg, also in https://www.writelatex.com/542861kyqykv

\documentclass{beamer}
\usetheme{Warsaw}
\usepackage{tikz}
\usetikzlibrary{fadings}


\setbeamertemplate{background}{%
\begin{tikzpicture}
\path (0,0) rectangle (\paperwidth,\paperheight);
\node[scope fading=west,inner sep=0pt,outer sep=0pt,anchor=north east] at(\paperwidth,\paperheight) {\includegraphics[height=\paperheight]{frog.jpg}};
\end{tikzpicture}
}

\author{Kermit}
\title{Autobiography}
\begin{document}
\maketitle

\end{document}

enter image description here

Related Solutions

[Tex/LaTex] How to include a background image to only one page of a beamer presentation

You can declare the background just before the slide, and un-declare it just after it.:

\documentclass{beamer}
\usepackage{tikz}



\begin{document}

\begin{frame}
Background transparent image, not here
\end{frame}

\usebackgroundtemplate{%             declare it
\tikz[overlay,remember picture] \node[opacity=0.3, at=(current page.center)] {
   \includegraphics[height=\paperheight,width=\paperwidth]{example-image-a}};
}

\begin{frame}
Background transparent image, centered on slide
\end{frame}

\usebackgroundtemplate{ }    %% undeclare it

\begin{frame}
Background transparent image, not here
\end{frame}

\end{document}

enter image description here

You can also use a group on the other hand:

\bgroup
\usebackgroundtemplate{%
\tikz[overlay,remember picture] \node[opacity=0.3, at=(current page.center)] {
   \includegraphics[height=\paperheight,width=\paperwidth]{example-image-a}};
}

\begin{frame}
Background transparent image, centered on slide
\end{frame}

\egroup

[Tex/LaTex] Gradient to transparent (horizontal) for beamer frametitle

Here is a solution. It's rather inelegant as it involves vertical re-positioning of separate boxes---one for the fade, and a separate for the frametitle. The right hand side of the fade is somewhat sharper than I'd like, but here goes the relevant code addition:

\usepackage{tikz}
\usetikzlibrary{fadings}%To set up the fade parameters
\begin{tikzfadingfrompicture}[name=fade right]
\shade[left color=transparent!15,
right color=transparent!100] (0,0) rectangle (2,2);
\end{tikzfadingfrompicture}

\setbeamertemplate{headline}
{
\hbox{%For the fade box---this has to come first otherwise the title won't appear ``on top'' of the faded box                                                                                                                                                                                                            
\tikz\fill[scale=1.5,path fading= fade right, mypurple] (0,0) rectangle (.45\paperwidth,0.5);
        }%

\vspace{-3.5em} 

\hbox{%For the frame title
\pgfsetfillopacity{0}\begin{beamercolorbox}[wd=\paperwidth,ht=5.5ex,dp=3ex,left]{frame title}%
\usebeamerfont{frame title}\pgfsetfillopacity{1}\hspace{1em}{\large\insertframetitle}
\end{beamercolorbox}}%
}

Best Answer

Related Solutions

[Tex/LaTex] How to include a background image to only one page of a beamer presentation

[Tex/LaTex] Gradient to transparent (horizontal) for beamer frametitle

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