Update README

Limin Wang · Limin Wang · commit 9afa1566a992 · 2015-08-03T16:17:47.000+08:00
diff --git a/README b/README
@@ -1 +1,6 @@
-This is a sample code for extrating dense flow field given a video
+This is a sample code for extrating dense flow field given a video.
+
+Usage:
+./denseFlow_gpu -f test.avi -x tmp/flow_x -y tmp/flow_x -i tmp/image -b 20 -t 1 -d 0 -s 1
+test.avi: input video
+tmp: folder containing RGB images and optical flow images
