1 files changed, 3 insertions, 0 deletions
diff --git a/filterNorm.m b/filterNorm.m
new file mode 100644
index 0000000..2037ae0
--- /dev/null
+++ b/filterNorm.m
@@ -0,0 +1,3 @@
+function fout = filterNorm(fin)
+    [x,y]=size(fin);
+    fout = fin-sum(sum(fin))/x/y;
+\ No newline at end of file