MathematicalEngineeringDeepLearning/tikz/figure3-11-bottleneck_autoencoder.tex at master · yoninazarathy/MathematicalEngineeringDeepLearning · GitHub

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\documentclass[tikz, border=50pt]{standalone}

\usepackage{tikz}
\usepackage{medl_colors}

\usetikzlibrary{shapes.multipart, shapes.geometric, arrows.meta}
\usetikzlibrary{matrix, calc, positioning,fit}
\usepackage{amsmath}

\begin{document}
\begin{tikzpicture}

%Encoder - Input Layer
\node[bluelayer, inner xsep = 4cm, inner ysep=6cm] (encoderlayer){};
\node [greenshape, circle, minimum size=1.2cm ] (incircle1) at (-2.5, 4) {\large $ x_1 $};
\node [greenshape, circle, minimum size=1.2cm, below of=incircle1, node distance=3cm] (incircle2){\large $ x_2 $};
\node [greenshape, circle, minimum size=1.2cm, below of=incircle2, node distance=5cm] (incircle3){\large $ x_p $};
\draw[ultra thick, dotted] ([yshift=-3mm]incircle2.south) -- ([yshift=3mm]incircle3.north);
\node[above of=incircle1, align=center, node distance=1.4cm] {\large Input Layer};
\node[below left= 8mm and -9mm of incircle3] {\large Encoder};

%Bottleneck - hidden layer
\node[draw=fill-grey, ultra thick, rounded corners, inner xsep = 1.2cm, inner ysep=4cm] at (2.5,0)(hiddenlayer){};
\node [blueshape, circle, minimum size=1.2cm ] (hidcircle1) at (2.5, 3) {\large $\tilde x_1$};
\node [blueshape, circle, minimum size=1.2cm, below of=hidcircle1, node distance=2.5cm ] (hidcircle2){\large $\tilde x_2$};
\node [blueshape, circle, minimum size=1.2cm, below of=hidcircle2, node distance=3.5cm ] (hidcircle3){\large $\tilde x_m$};
\draw[draw, ultra thick, dotted] ([yshift=-3mm]hidcircle2.south) -- ([yshift=3mm]hidcircle3.north);
\node[above of=hidcircle1, align=center, node distance=1.5cm] {\large Bottleneck};

%Decode - Output Layer
\node[redlayer, rounded corners, inner xsep = 4cm, inner ysep=6cm] at(5,-.2)(encoderlayer){};
\node [redshape, circle, minimum size=1.2cm] (outcircle1) at (7.5, 4) {\large $\hat x_1 $};
\node [redshape, circle, minimum size=1.2cm,  below of=outcircle1, node distance=3cm] (outcircle2){\large $\hat x_2 $};
\node [redshape, circle, minimum size=1.2cm,  below of=outcircle2, node distance=5cm] (outcircle3){\large $\hat x_p $};
\draw[ultra thick, dotted] ([yshift=-3mm]outcircle2.south) -- ([yshift=3mm]outcircle3.north);
\node[above of=outcircle1, align=center, node distance=1.3cm] {\large Output Layer};
\node[below right = 1.1cm and -9mm of outcircle3] {\large Decoder};

%Arrows
\foreach \i in {1,2,3}
{
    \foreach \j in {1,2,3}
    {
      \draw[-Triangle, thickline] (incircle\i) -- (hidcircle\j);
      \draw[-Triangle, thickline] (hidcircle\i) -- (outcircle\j);
    }
}

\end{tikzpicture}
\end{document}