Merge pull request #1621 from nilchia/vpt

set default value for center xy

Author: bgruening

tools/vpt/vpt_extract.xml

@@ -31,8 +31,8 @@
     ]]></command>
     <inputs>
         <expand macro="common_input"/>
-        <param argument="--center-x" type="integer" label="X coordinate in micron space"/>
-        <param argument="--center-y" type="integer" label="Y coordinate in micron space"/>
+        <param argument="--center-x" type="integer" value="0" label="X coordinate in micron space"/>
+        <param argument="--center-y" type="integer" value="0" label="Y coordinate in micron space"/>
         <param argument="--size-x" type="integer" min="1" value="108" label="Width of the patch in micron space"/>
         <param argument="--size-y" type="integer" min="1" value="108" label="Height of the patch in micron space"/>
         <param argument="--input_z_index" type="integer" min="0" value="2" label="The Z plane of the mosaic tiff images to use for the patch"/>