Example
<svg width="900px" height="400px" viewBox="900 400">
<defs>
<filter id="GaussianHardEdge" x="0%" y="0%" width="100%" height="100%">
<feGaussianBlur stdDeviation="5"/>
<feComponentTransfer>
<feFuncA type="table" tableValues="1 1"/>
</feComponentTransfer>
</filter>
</defs>
<image xlink:href="https://upload.wikimedia.org/wikipedia/commons/a/af/Fruit_Stall_in_Barcelona_Market.jpg" x="20px" y="20px" width="300px" height="200px" preserveAspectRatio="xMinYMin meet" />
<image filter="url(#GaussianHardEdge)" xlink:href="https://upload.wikimedia.org/wikipedia/commons/a/af/Fruit_Stall_in_Barcelona_Market.jpg" x="340px" y="20px" width="300px" height="200px" preserveAspectRatio="xMinYMin meet"/>
</svg>
(Source image by Daderot at Wikimedia Commons)
