Add dense block

tikz/dense-block/Makefile

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+SOURCE = dense-block
+DELAY = 80
+DENSITY = 300
+WIDTH = 512
+
+make:
+	pdflatex $(SOURCE).tex -output-format=pdf
+	make clean
+
+clean:
+	rm -rf  $(TARGET) *.class *.html *.log *.aux *.data *.gnuplot
+
+gif:
+	pdfcrop $(SOURCE).pdf
+	convert -verbose -delay $(DELAY) -loop 0 -density $(DENSITY) $(SOURCE)-crop.pdf $(SOURCE).gif
+	make clean
+
+png:
+	make
+	make svg
+	inkscape $(SOURCE).svg -w $(WIDTH) --export-png=$(SOURCE).png
+
+transparentGif:
+	convert $(SOURCE).pdf -transparent white result.gif
+	make clean
+
+svg:
+	#inkscape $(SOURCE).pdf --export-plain-svg=$(SOURCE).svg
+	pdf2svg $(SOURCE).pdf $(SOURCE).svg
+	# Necessary, as pdf2svg does not always create valid svgs:
+	inkscape $(SOURCE).svg --export-plain-svg=$(SOURCE).svg

tikz/dense-block/README.md

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+Compiled example
+----------------
+![Example](dense-block.png)

tikz/dense-block/dense-block.tex

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+\documentclass{standalone}
+\usepackage{amssymb}
+\usepackage{tikz}
+\usetikzlibrary{arrows.meta}
+\usetikzlibrary{shapes.geometric,arrows,positioning}
+
+\begin{document}
+
+\begin{tikzpicture}
+    \tikzstyle{conv-layer}=[draw,minimum width=3cm,minimum height=1cm]
+    \tikzstyle{arrow}=[->, -Latex, thick]
+
+    \draw[fill=black!10,dotted] (-2.5, -7.0) rectangle (2.5, 1.2);
+
+    \node[rectangle, fill=black,minimum width=3cm] (input) at (0, 1) {};
+    \path[arrow] (0, 2) edge node[right, midway] {$256$-d in} (input.north);
+
+    % first path
+    \node (conv1) at (0,-1.0) [conv-layer] {$k$ @ $1 \times 1 \times 256$};
+    \node (conc1) at (0,-2.7) [conv-layer, dashed] {concatenate};
+    \node (conv2) at (0,-4.4) [conv-layer] {$k$ @ $1 \times 1 \times 256$};
+    \node (conc2) at (0,-6.1) [conv-layer, dashed] {concatenate};
+
+    \path[arrow] (input.south) edge node[right, midway] {$256$-d in} (conv1.north);
+    \path[arrow] (conv1.south) edge node[right, midway] {$k$-d in} (conc1.north);
+     \path[arrow] (conc1.south) edge node[right, midway] {$(256 + k)$-d in} (conv2.north);
+    \path[arrow] (conv2.south) edge node[right, midway] {$k$-d in} (conc2.north);
+
+    \path[arrow] (input.south west) edge[bend right] node[right, midway] {} (conc1.north west);
+    \path[arrow] (conc1.south west) edge[bend right] node[right, midway] {} (conc2.north west);
+
+    \path[arrow] (conc2.south) edge node[right] {$(256+2k)$-d out} (0, -8);
+
+\end{tikzpicture}
+\end{document}