better image clipping detection

lib/imaging.py

@@ -168,7 +168,8 @@ class FluorescenceData(ImagingData):
         for label, array in self.arrays.items():
             if label == "background":
                 continue
-            if array.max() == np.iinfo(array.dtype).max:
+            dtype_info = np.iinfo(array.dtype)
+            if array.max() >= (dtype_info.max - dtype_info.bits):
                 print("[imaging] WARNING: image may contain clipping")
             N = compute_mot_number(
                 array if "background" not in self.arrays.keys() \