Co-register two remote sensing images using RSGISLib.

warpImage.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!--
    Co-register two images
-->

<rsgis:commands xmlns:rsgis="http://www.rsgislib.org/xml/">

    <!-- Generate GCPs -->
    <rsgis:command algor="registration" option="basic" 
        reference="ref_image.kea" 
        floating="float_image.kea" 
        output="float2ref_tiepoints.txt" 
        outputType="rsgis_img2map" metric="correlation" 
        pixelgap="50" window="100" search="10" threshold="0.6" 
        stddevRef="2" stddevFloat="2" subpixelresolution="4"  />

    <!-- Add GCPs to GDAL -->
        <rsgis:command algor="registration" option="gcp2gdal" 
        gcps="float2ref_tiepoints.txt" 
        image="float_image.kea" 
        output="float_image_gcps.kea" 
        datatype="UInt16" format="KEA" />

    <!-- Warp using GDAL -->
    <rsgis:command algor="commandline" option="execute" 
        command="gdalwarp -of KEA -ot Byte -tr 100 100 -tps float_image_gcps.kea float_image_warp.kea" />
    
    <rsgis:command algor="commandline" option="execute" 
        command="rm float_image_gcps.kea" />

</rsgis:commands>