diff --git a/ld2dap/AttributeProfiles.py b/ld2dap/AttributeProfiles.py
index c8551cf..402907c 100644
--- a/ld2dap/AttributeProfiles.py
+++ b/ld2dap/AttributeProfiles.py
@@ -12,6 +12,7 @@ from core import Filter
 
 ## TODO: dep
 import sys
+import numpy as np
 sys.path.append('../triskele/python')
 import triskele
 
@@ -31,4 +32,6 @@ class AttributeProfiles(Filter):
                               standard_deviation=self.sd,
                               moment_of_inertia=self.moi)
 
-        return att, None
+        att = np.dstack((att_min, att_max))
+
+        return att, metadata
diff --git a/ld2dap/SaveFig.py b/ld2dap/SaveFig.py
new file mode 100644
index 0000000..9d72e50
--- /dev/null
+++ b/ld2dap/SaveFig.py
@@ -0,0 +1,29 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+# \file SaveFig.py
+# \brief TODO
+# \author Florent Guiotte <florent.guiotte@gmail.com>
+# \version 0.1
+# \date 09 avril 2018
+#
+# TODO details
+
+from core import Output
+
+import matplotlib.pyplot as plt
+
+class SaveFig(Output):
+    def __init__(self, fname, bbox_inches='tight', pad_inches=1):
+        super().__init__(self.__class__.__name__)
+        self.fname       = fname
+        self.bbox_inches = bbox_inches
+        self.pad_inches  = pad_inches
+
+    def _process(self, data, metadata):
+        im_size = 2
+        plt.figure(figsize=(16*im_size,3*im_size))
+        plt.imshow(data[:,:,-1])
+        plt.colorbar()
+        if metadata is not None:
+            plt.title(metadata[-1])
+        plt.savefig(self.fname, bbox_inches=self.bbox_inches, pad_inches=self.pad_inches)
diff --git a/ld2dap/core/Node.py b/ld2dap/core/Node.py
index 1a6ca27..3af0305 100644
--- a/ld2dap/core/Node.py
+++ b/ld2dap/core/Node.py
@@ -17,7 +17,7 @@ class Node(object):
         return ("Node:{}".format(self.name))
 
     def process(self, data, metadata=None):
-        self._process(data)
+        self._process(data, metadata)
 
     def _process(self, data, metadata=None):
         raise NotImplementedError(
diff --git a/ld2dap/test.py b/ld2dap/test.py
index 1e3fbed..6769ceb 100644
--- a/ld2dap/test.py
+++ b/ld2dap/test.py
@@ -8,17 +8,20 @@
 #
 # TODO details
 
-from core import Input, Output, Filter
+#from core import Input, Output, Filter
 from LoadTIFF import LoadTIFF
 from AttributeProfiles import AttributeProfiles as APs
+from SaveFig import SaveFig
+
+import numpy as np
 
 def main():
-    i = LoadTIFF(['../Data/test.tiff'])
-    ap = APs()
-    o = Output('o')
+    i = LoadTIFF(['../Data/test.tiff', '../Data/test.tiff'])
+    ap = APs(np.array([100,1e3,1e4]))
+    o = SaveFig('test.png')
 
     ap.input = i
-    o.input = i
+    o.input = ap
 
     o.run()