diff --git a/.gitignore b/.gitignore
index e69de29..c8f5303 100644
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1,8 @@
+# Ignore all bmp, png, jpeg files
+*.bmp
+*.png
+*.jpeg
+#excluded input image
+!in.bmp
+!in.png
+!in.jpeg
\ No newline at end of file