--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scale_image.xml	Sat Feb 09 14:46:03 2019 -0500
@@ -0,0 +1,61 @@
+<tool id="ip_scale_image" name="Scale Image" version="0.2">
+    <description>Scales image</description>
+    <requirements>
+        <requirement type="package" version="0.14.2">scikit-image</requirement>
+        <requirement type="package" version="1.15.4">numpy</requirement>
+    </requirements>
+    <command>
+        <![CDATA[
+        python '$__tool_directory__/scale_image.py' '$input' ./out.png
+        #if $use_scale_option.use_scale == 'true'
+          $use_scale_option.scale
+        #else if $use_scale_option.use_scale == 'false'
+          '[$use_scale_option.scale_x, $use_scale_option.scale_y]'
+        #end if
+        $order
+
+        ]]>
+    </command>
+    <inputs>
+        <param name="input" type="data" format="png" label="Image file"/>
+        <conditional name="use_scale_option"><!--a third option (using one integer as percentage scaling) could still be implemented-->
+            <param label="Lock scaling between image dimensions" name="use_scale" type="select">
+                <option selected="true" value="true">Lock</option>
+                <option value="false">Individual scales</option>
+            </param>
+            <when value="true">
+                <param name="scale" type="float" value="1.0" label="Scaling factor" />
+            </when>
+            <when value="false">
+                <param name="scale_x" type="integer" value="100" label="New height of the image in pixels" />
+                <param name="scale_y" type="integer" value="100" label="New width of the image in pixels" />
+            </when>
+        </conditional>
+        <param name="order" type="select" label="Interpolation method">
+            <option value="0">Nearest-neighbor</option>
+            <option value="1" selected="true">Bi-linear</option>
+            <option value="2">Bi-cubic</option>
+        </param>
+    </inputs>
+    <outputs>
+        <data format="png" name="output" from_work_dir="out.png"/>
+    </outputs>
+    <tests>
+        <test>
+            <param name="input" value="sample1.png"/> <!--continue here-->
+            <param name="use_scale_option.use_scale" value="false"/>
+            <param name="use_scale_option.scale_x" value="200"/>
+            <param name="use_scale_option.scale_y" value="150"/>
+            <param name="order" value="0"/>
+            <output name="output" value="out2.png" ftype="png" compare="sim_size"/>
+        </test>
+    </tests>
+    <help>
+    **What it does**
+
+    This tool scales an image using the scaling factor.
+    </help>
+    <citations>
+        <citation type="doi">10.1016/j.jbiotec.2017.07.019</citation>
+    </citations>
+</tool>