changed max5px to max5px_median

src/extraction/core/functions/cell.py

@@ -90,9 +90,10 @@ def max2p5pc(cell_mask, trap_image) -> float:
     return np.mean(top_values)
 
 
-def max5px(cell_mask, trap_image) -> float:
+def max5px_median(cell_mask, trap_image) -> float:
     """
-    Find the mean of the five brightest pixels in the cell.
+    Find the mean of the five brightest pixels in the cell divided by the
+    median of all pixels.
 
     Parameters
     ----------
@@ -105,7 +106,7 @@ def max5px(cell_mask, trap_image) -> float:
     top_values = bn.partition(pixels, len(pixels) - 5)[-5:]
     # find mean of five brightest pixels
     max5px = np.mean(top_values)
-    return max5px
+    return max5px / np.median(pixels)
 
 
 def std(cell_mask, trap_image):