From 6b7078cbaffbf11a1f073a14ff59109128f831c8 Mon Sep 17 00:00:00 2001
From: Martin Thoma <info@martin-thoma.de>
Date: Fri, 16 Aug 2019 20:07:22 +0200
Subject: [PATCH] Add max-pool

---
 tikz/convolution-layer/max-pool.tex | 95 +++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 tikz/convolution-layer/max-pool.tex

diff --git a/tikz/convolution-layer/max-pool.tex b/tikz/convolution-layer/max-pool.tex
new file mode 100644
index 0000000..fa7f197
--- /dev/null
+++ b/tikz/convolution-layer/max-pool.tex
@@ -0,0 +1,95 @@
+\definecolor{c1}{HTML}{9ACFC6}
+\definecolor{c2}{HTML}{DABBD6}
+\definecolor{c3}{HTML}{CBDCB9}
+\definecolor{c4}{HTML}{9AC3E1}
+\definecolor{c5}{HTML}{DEBBA5}
+\definecolor{c6}{HTML}{C4DDE5}
+\newcommand*{\xMin}{0}%
+\newcommand*{\xMax}{6}%
+\newcommand*{\yMin}{0}%
+\newcommand*{\yMax}{4}%
+
+\newcommand*{\xMinR}{9.5}%
+\newcommand*{\xMaxR}{12.5}%
+\newcommand*{\yMinR}{1}%
+\newcommand*{\yMaxR}{3}%
+
+\begin{tikzpicture}
+    \fill [c1] (0, 0) rectangle (2, 2);
+    \fill [c2]   (2, 0) rectangle (4, 2);
+    \fill [c3]  (4, 0) rectangle (6, 2);
+    \fill [c4] (0, 2) rectangle (2, 4);
+    \fill [c5]   (2, 2) rectangle (4, 4);
+    \fill [c6]   (4, 2) rectangle (6, 4);
+
+    \fill [c1]  (9.5, 1) rectangle (10.5, 2);
+    \fill [c2]   (10.5, 1) rectangle (11.5, 2);
+    \fill [c3]  (11.5, 1) rectangle (12.5, 2);
+    \fill [c4]  (9.5, 2) rectangle (10.5, 3);
+    \fill [c5]   (10.5, 2) rectangle (11.5, 3);
+    \fill [c6]   (11.5, 2) rectangle (12.5, 3);
+
+    \foreach \i in {\xMin,...,\xMax} {
+        \draw [very thin,gray] (\i,\yMin) -- (\i,\yMax)  node [below] at (\i,\yMin) {};
+    }
+    \foreach \i in {\yMin,...,\yMax} {
+        \draw [very thin,gray] (\xMin,\i) -- (\xMax,\i) node [left] at (\xMin,\i) {};
+    }
+
+    \foreach \i in {\xMin,2,...,\xMax} {
+        \draw [thick,gray] (\i,\yMin) -- (\i,\yMax)  node [below] at (\i,\yMin) {};
+    }
+    \foreach \i in {\yMin,2,...,\yMax} {
+        \draw [thick,gray] (\xMin,\i) -- (\xMax,\i) node [left] at (\xMin,\i) {};
+    }
+    \node at (0.5, 0.5) {7};
+    \node at (1.5, 0.5) {9};
+    \node at (2.5, 0.5) {3};
+    \node at (3.5, 0.5) {5};
+    \node at (4.5, 0.5) {9};
+    \node at (5.5, 0.5) {4};
+    %
+    \node at (0.5, 1.5) {0};
+    \node at (1.5, 1.5) {7};
+    \node at (2.5, 1.5) {0};
+    \node at (3.5, 1.5) {0};
+    \node at (4.5, 1.5) {9};
+    \node at (5.5, 1.5) {0};
+    %
+    \node at (0.5, 2.5) {5};
+    \node at (1.5, 2.5) {0};
+    \node at (2.5, 2.5) {9};
+    \node at (3.5, 2.5) {3};
+    \node at (4.5, 2.5) {7};
+    \node at (5.5, 2.5) {5};
+    %
+    \node at (0.5, 3.5) {9};
+    \node at (1.5, 3.5) {2};
+    \node at (2.5, 3.5) {9};
+    \node at (3.5, 3.5) {6};
+    \node at (4.5, 3.5) {4};
+    \node at (5.5, 3.5) {3};
+
+    \draw[draw=black,line width=12pt,-{Latex[length=9mm]}] (6.5, 2)  -- (9,2);
+    \node[font=\footnotesize\bfseries] at (7.7, 2.5) {$\mathbf{2\times 2}$ max pooling};
+
+    \foreach \i in {\xMinR,...,\xMaxR} {
+        \draw [thick,gray] (\i,\yMinR) -- (\i,\yMaxR)  node [below] at (\i,\yMinR) {};
+    }
+    \foreach \i in {\yMinR,...,\yMaxR} {
+        \draw [thick,gray] (\xMinR,\i) -- (\xMaxR,\i) node [left] at (\xMinR,\i) {};
+    }
+
+    \node at (10, 1.5) {9};
+    \node at (11, 1.5) {5};
+    \node at (12, 1.5) {9};
+    \node at (10, 2.5) {9};
+    \node at (11, 2.5) {9};
+    \node at (12, 2.5) {7};
+
+    \draw [decorate,decoration={brace,amplitude=4pt},xshift=-2pt,yshift=0pt]
+(0,2) -- (0,4) node [black,midway,xshift=-0.3cm] {\footnotesize $2$};
+
+    \draw [decorate,decoration={brace,amplitude=4pt},xshift=0pt,yshift=2pt]
+(0,4) -- (2,4) node [black,midway,yshift=+0.3cm] {\footnotesize $2$};
+\end{tikzpicture}
\ No newline at end of file