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% objects at depth 47:
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\draw[magenta] (5.00889,4.94222) -- (5.00889,4.94222) -- (5.10222,4.94222) -- (5.12,4.94222) -- (5.22222,4.94444) -- (5.31778,4.94444) -- (5.4,4.94667) -- (5.48667,4.95556) -- (5.55111,4.96667) -- (5.74444,5.02667) -- (5.96667,5.14222) -- (6.36222,5.47556) -- (6.65778,5.83556) -- (6.95556,6.3) -- (7.39333,7.13111) -- (8.05778,8.20889) -- (8.26444,8.34444) -- (8.36889,8.36) -- (8.47111,8.34444) -- (8.67778,8.21111) -- (9.11333,7.61778) -- (9.52,6.93333) -- (9.81778,6.5) -- (10.04667,6.23556) -- (10.25333,6.05111) -- (10.48,5.89778) -- (10.87111,5.74222) -- (10.90444,5.73556) -- (11.03556,5.71556) -- (11.12444,5.70889) -- (11.19778,5.70667) -- (11.27111,5.70667) -- (11.34667,5.70667) -- (11.38222,5.70667) -- (11.45333,5.70667);
\draw[magenta] (4.95778,4.99333) -- (4.95778,4.99333) -- (5.06,4.99333) -- (5.06,4.89111) -- (4.95778,4.89111) -- cycle;
\draw[magenta] (5.00889,4.94222) -- cycle;
\draw[magenta] (5.05111,4.99333) -- (5.05111,4.99333) -- (5.15333,4.99333) -- (5.15333,4.89111) -- (5.05111,4.89111) -- cycle;
\draw[magenta] (5.10222,4.94222) -- cycle;
\draw[magenta] (5.06889,4.99333) -- (5.06889,4.99333) -- (5.17111,4.99333) -- (5.17111,4.89111) -- (5.06889,4.89111) -- cycle;
\draw[magenta] (5.12,4.94222) -- cycle;
\draw[magenta] (5.17111,4.99556) -- (5.17111,4.99556) -- (5.27333,4.99556) -- (5.27333,4.89333) -- (5.17111,4.89333) -- cycle;
\draw[magenta] (5.22222,4.94444) -- cycle;
\draw[magenta] (5.26667,4.99556) -- (5.26667,4.99556) -- (5.36889,4.99556) -- (5.36889,4.89333) -- (5.26667,4.89333) -- cycle;
\draw[magenta] (5.31778,4.94444) -- cycle;
\draw[magenta] (5.34889,4.99778) -- (5.34889,4.99778) -- (5.45111,4.99778) -- (5.45111,4.89556) -- (5.34889,4.89556) -- cycle;
\draw[magenta] (5.4,4.94667) -- cycle;
\draw[magenta] (5.43556,5.00667) -- (5.43556,5.00667) -- (5.53778,5.00667) -- (5.53778,4.90444) -- (5.43556,4.90444) -- cycle;
\draw[magenta] (5.48667,4.95556) -- cycle;
\draw[magenta] (5.5,5.01778) -- (5.5,5.01778) -- (5.60222,5.01778) -- (5.60222,4.91556) -- (5.5,4.91556) -- cycle;
\draw[magenta] (5.55111,4.96667) -- cycle;
\draw[magenta] (5.69333,5.07778) -- (5.69333,5.07778) -- (5.79556,5.07778) -- (5.79556,4.97556) -- (5.69333,4.97556) -- cycle;
\draw[magenta] (5.74444,5.02667) -- cycle;
\draw[magenta] (5.91556,5.19333) -- (5.91556,5.19333) -- (6.01778,5.19333) -- (6.01778,5.09111) -- (5.91556,5.09111) -- cycle;
\draw[magenta] (5.96667,5.14222) -- cycle;
\draw[magenta] (6.31111,5.52667) -- (6.31111,5.52667) -- (6.41333,5.52667) -- (6.41333,5.42444) -- (6.31111,5.42444) -- cycle;
\draw[magenta] (6.36222,5.47556) -- cycle;
\draw[magenta] (6.60667,5.88667) -- (6.60667,5.88667) -- (6.70889,5.88667) -- (6.70889,5.78444) -- (6.60667,5.78444) -- cycle;
\draw[magenta] (6.65778,5.83556) -- cycle;
\draw[magenta] (6.90444,6.35111) -- (6.90444,6.35111) -- (7.00667,6.35111) -- (7.00667,6.24889) -- (6.90444,6.24889) -- cycle;
\draw[magenta] (6.95556,6.3) -- cycle;
\draw[magenta] (7.34222,7.18222) -- (7.34222,7.18222) -- (7.44444,7.18222) -- (7.44444,7.08) -- (7.34222,7.08) -- cycle;
\draw[magenta] (7.39333,7.13111) -- cycle;
\draw[magenta] (8.00667,8.26) -- (8.00667,8.26) -- (8.10889,8.26) -- (8.10889,8.15778) -- (8.00667,8.15778) -- cycle;
\draw[magenta] (8.05778,8.20889) -- cycle;
\draw[magenta] (8.21333,8.39556) -- (8.21333,8.39556) -- (8.31556,8.39556) -- (8.31556,8.29333) -- (8.21333,8.29333) -- cycle;
\draw[magenta] (8.26444,8.34444) -- cycle;
\draw[magenta] (8.31778,8.41111) -- (8.31778,8.41111) -- (8.42,8.41111) -- (8.42,8.30889) -- (8.31778,8.30889) -- cycle;
\draw[magenta] (8.36889,8.36) -- cycle;
\draw[magenta] (8.42,8.39556) -- (8.42,8.39556) -- (8.52222,8.39556) -- (8.52222,8.29333) -- (8.42,8.29333) -- cycle;
\draw[magenta] (8.47111,8.34444) -- cycle;
\draw[magenta] (8.62667,8.26222) -- (8.62667,8.26222) -- (8.72889,8.26222) -- (8.72889,8.16) -- (8.62667,8.16) -- cycle;
\draw[magenta] (8.67778,8.21111) -- cycle;
\draw[magenta] (9.06222,7.66889) -- (9.06222,7.66889) -- (9.16444,7.66889) -- (9.16444,7.56667) -- (9.06222,7.56667) -- cycle;
\draw[magenta] (9.11333,7.61778) -- cycle;
\draw[magenta] (9.46889,6.98444) -- (9.46889,6.98444) -- (9.57111,6.98444) -- (9.57111,6.88222) -- (9.46889,6.88222) -- cycle;
\draw[magenta] (9.52,6.93333) -- cycle;
\draw[magenta] (9.76667,6.55111) -- (9.76667,6.55111) -- (9.86889,6.55111) -- (9.86889,6.44889) -- (9.76667,6.44889) -- cycle;
\draw[magenta] (9.81778,6.5) -- cycle;
\draw[magenta] (9.99556,6.28667) -- (9.99556,6.28667) -- (10.09778,6.28667) -- (10.09778,6.18444) -- (9.99556,6.18444) -- cycle;
\draw[magenta] (10.04667,6.23556) -- cycle;
\draw[magenta] (10.20222,6.10222) -- (10.20222,6.10222) -- (10.30444,6.10222) -- (10.30444,6) -- (10.20222,6) -- cycle;
\draw[magenta] (10.25333,6.05111) -- cycle;
\draw[magenta] (10.42889,5.94889) -- (10.42889,5.94889) -- (10.53111,5.94889) -- (10.53111,5.84667) -- (10.42889,5.84667) -- cycle;
\draw[magenta] (10.48,5.89778) -- cycle;
\draw[magenta] (10.82,5.79333) -- (10.82,5.79333) -- (10.92222,5.79333) -- (10.92222,5.69111) -- (10.82,5.69111) -- cycle;
\draw[magenta] (10.87111,5.74222) -- cycle;
\draw[magenta] (10.85333,5.78667) -- (10.85333,5.78667) -- (10.95556,5.78667) -- (10.95556,5.68444) -- (10.85333,5.68444) -- cycle;
\draw[magenta] (10.90444,5.73556) -- cycle;
\draw[magenta] (10.98444,5.76667) -- (10.98444,5.76667) -- (11.08667,5.76667) -- (11.08667,5.66444) -- (10.98444,5.66444) -- cycle;
\draw[magenta] (11.03556,5.71556) -- cycle;
\draw[magenta] (11.07333,5.76) -- (11.07333,5.76) -- (11.17556,5.76) -- (11.17556,5.65778) -- (11.07333,5.65778) -- cycle;
\draw[magenta] (11.12444,5.70889) -- cycle;
\draw[magenta] (11.14667,5.75778) -- (11.14667,5.75778) -- (11.24889,5.75778) -- (11.24889,5.65556) -- (11.14667,5.65556) -- cycle;
\draw[magenta] (11.19778,5.70667) -- cycle;
\draw[magenta] (11.22,5.75778) -- (11.22,5.75778) -- (11.32222,5.75778) -- (11.32222,5.65556) -- (11.22,5.65556) -- cycle;
\draw[magenta] (11.27111,5.70667) -- cycle;
\draw[magenta] (11.29556,5.75778) -- (11.29556,5.75778) -- (11.39778,5.75778) -- (11.39778,5.65556) -- (11.29556,5.65556) -- cycle;
\draw[magenta] (11.34667,5.70667) -- cycle;
\draw[magenta] (11.33111,5.75778) -- (11.33111,5.75778) -- (11.43333,5.75778) -- (11.43333,5.65556) -- (11.33111,5.65556) -- cycle;
\draw[magenta] (11.38222,5.70667) -- cycle;
\draw[magenta] (11.40222,5.75778) -- (11.40222,5.75778) -- (11.50444,5.75778) -- (11.50444,5.65556) -- (11.40222,5.65556) -- cycle;
\draw[magenta] (11.45333,5.70667) -- cycle;
\draw[magenta] (12.79333,3.44) -- (12.79333,3.44) -- (12.89556,3.44) -- (12.89556,3.33778) -- (12.79333,3.33778) -- cycle;
\draw[magenta] (12.84444,3.38889) -- cycle;

% objects at depth 5:
\draw[black] (3.18444,9.20667) -- (3.33333,9.20667);
\draw[black] (13.55111,9.20667) -- (13.40222,9.20667);
\draw[black] (3.18444,7.82889) -- (3.33333,7.82889);
\draw[black] (13.55111,7.82889) -- (13.40222,7.82889);
\draw[black] (3.18444,6.45111) -- (3.33333,6.45111);
\draw[black] (13.55111,6.45111) -- (13.40222,6.45111);
\draw[black] (3.18444,5.07111) -- (3.33333,5.07111);
\draw[black] (13.55111,5.07111) -- (13.40222,5.07111);
\draw[black] (3.18444,3.69333) -- (3.33333,3.69333);
\draw[black] (13.55111,3.69333) -- (13.40222,3.69333);
\draw[black] (3.18444,2.31556) -- (3.33333,2.31556);
\draw[black] (13.55111,2.31556) -- (13.40222,2.31556);
\draw[black] (4.22222,9.20667) -- (4.22222,9.05778);
\draw[black] (4.22222,2.31556) -- (4.22222,2.46444);
\draw[black] (6.29556,9.20667) -- (6.29556,9.05778);
\draw[black] (6.29556,2.31556) -- (6.29556,2.46444);
\draw[black] (8.36889,9.20667) -- (8.36889,9.05778);
\draw[black] (8.36889,2.31556) -- (8.36889,2.46444);
\draw[black] (10.44222,9.20667) -- (10.44222,9.05778);
\draw[black] (10.44222,2.31556) -- (10.44222,2.46444);
\draw[black] (12.51556,9.20667) -- (12.51556,9.05778);
\draw[black] (12.51556,2.31556) -- (12.51556,2.46444);

% objects at depth 4:
\draw[black] (3.18444,9.20667) rectangle (13.55111,2.31556);

% objects at depth 2:
\path (3.02667,9.33778) node[text=black,anchor=base east] { 0};
\path (3.02667,7.96) node[text=black,anchor=base east] { 5};
\path (3.02667,6.58222) node[text=black,anchor=base east] { 10};
\path (3.02667,5.20222) node[text=black,anchor=base east] { 15};
\path (3.02667,3.82444) node[text=black,anchor=base east] { 20};
\path (3.02667,2.44667) node[text=black,anchor=base east] { 25};

% objects at depth 0:
\path (4.22222,9.60222) node[text=black,anchor=base] {-4};
\path (6.29556,9.60222) node[text=black,anchor=base] {-2};
\path (8.36889,9.60222) node[text=black,anchor=base] { 0};
\path (10.44222,9.60222) node[text=black,anchor=base] { 2};
\path (12.51556,9.60222) node[text=black,anchor=base] { 4};
\path (2.39333,5.76222) node[text=black,anchor=base,rotate=90.0] {boundary indicator value $|\vec{b}_g(t)|$};
\path (8.36667,9.99778) node[text=black,anchor=base] {arc length distance $t$ from saddle [pixels]};
\path (8.36889,5.47778) node[text=black,anchor=base west] { saddle pos};
\path (12.29778,2.72667) node[text=black,anchor=base east] {undesired, noise-induced edge};
\path (12.29778,2.99111) node[text=black,anchor=base east] {real, high-contrast image edge};
\path (12.29778,3.25556) node[text=black,anchor=base east] {real, low-contrast image edge};
\path (12.29778,3.52) node[text=black,anchor=base east] {streamer (converging to real edges)};

\end{tikzpicture}%