very promissing fiducial detection

pyqtUsrObj.py

@@ -527,6 +527,17 @@ class FixTargetFrame(pg.ROI):
 
 ## Start Qt event loop unless running in interactive mode or using pyside.
 if __name__=='__main__':
+  def set_fiducial(pic):
+    # fiducial test
+    f=np.array(((0, 0, 0, 0, 0),
+                (0, 1, 1, 1, 0),
+                (0, 1, 0, 0, 0),
+                (0, 1, 1, 0, 0),
+                (0, 1, 0, 0, 0),
+                (0, 0, 0, 0, 0),), pic.dtype)
+    pic[0:6, 0:5]=f*pic.max()
+
+
   # TODO: pg.ItemGroup does not support bounding box and therefore vb.autoRange() does not work
   class ItemGroup(pg.ItemGroup):
     # own item group that supports bounding rect
@@ -667,7 +678,7 @@ if __name__=='__main__':
   arr[:, 50]=10
   arr+=np.sin(np.linspace(0, 20, 100)).reshape(1, 100)
   arr+=np.random.normal(size=(100, 100))
-
+  set_fiducial(arr)
   # add an arrow for asymmetry
   arr[10, :50]=10
   arr[9:12, 44:48]=10