diff --git a/matlab/tfgm/scripts/get_mask_area.m b/matlab/tfgm/scripts/get_mask_area.m
new file mode 100644
index 0000000000000000000000000000000000000000..f3701b9c08aafee0eb2eb566a6a43c144cd97d7e
--- /dev/null
+++ b/matlab/tfgm/scripts/get_mask_area.m
@@ -0,0 +1,10 @@
+function [mask_area, varargout] = get_mask_area(mask)
+%compute mask area
+
+mask_area = sum(mask(:));
+mask_area_ratio = mask_area/ (size(mask,1)*size(mask,2));
+ varargout{1} = mask_area_ratio;
+       
+end
+
+