src/main/java/ch/psi/mxsc/BasePlate.java

@@ -14,6 +14,7 @@ import java.awt.Component;
 import java.awt.Graphics2D;
 import java.awt.Point;
 import java.awt.Rectangle;
+import java.awt.geom.Ellipse2D;
 import java.awt.image.BufferedImage;
 import java.io.IOException;
 import java.util.ArrayList;
@@ -230,6 +231,7 @@ public class BasePlate extends DeviceBase {
         boundingBox = new Rectangle((int)(plotRect.x+plotRect.width*0.05), (int)(plotRect.y+plotRect.height * 0.05), (int)(plotRect.width*0.90), (int)(plotRect.height*0.90));
         if (img!=null){
             img = Utils.stretch(img, boundingBox.width, boundingBox.height);
+            g.setClip(new Ellipse2D.Float(boundingBox.x, boundingBox.y, boundingBox.width, boundingBox.height));
             g.drawImage(img, boundingBox.x, boundingBox.y, null);
         }
         boolean drawBackground =  (img==null);