Turn off low contrast warnings in io.imsave()

combinechannels.py

@@ -142,7 +142,7 @@ def main(args):
                         "max": 65535,
                         "LUTs": make_ij_lut(colors)}
             out_path = os.path.join(args.output, prefix + ".tif")
-            io.imsave(out_path, out_arr, imagej=True, metadata=metadata)
+            io.imsave(out_path, out_arr, imagej=True, metadata=metadata, check_contrast=False)
 
 
 if __name__ == "__main__":