From f7ed04bd99f77bb9f6754ce9a2a2d0404a744a65 Mon Sep 17 00:00:00 2001
From: Florian Jung <flo@windfisch.org>
Date: Mon, 25 Aug 2014 18:25:17 +0200
Subject: Initial commit

---
 test.py | 74 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 test.py

(limited to 'test.py')

diff --git a/test.py b/test.py
new file mode 100644
index 0000000..e711096
--- /dev/null
+++ b/test.py
@@ -0,0 +1,74 @@
+import cv2
+import math
+import numpy
+from math import sin,cos
+
+cap = cv2.VideoCapture("../vid.mp4")
+
+feature_params = dict( maxCorners = 100,
+                       qualityLevel = 0.3,
+                       minDistance = 20,
+                       blockSize = 7 )
+
+# Parameters for lucas kanade optical flow
+lk_params = dict( winSize  = (15,15),
+                  maxLevel = 2,
+                  criteria = (cv2.TERM_CRITERIA_EPS | cv2.TERM_CRITERIA_COUNT, 10, 0.03))
+
+
+ret,oldframe=cap.read()
+oldgray=cv2.cvtColor(oldframe,cv2.COLOR_BGR2GRAY)
+
+total_angle=0.
+total_x=0
+total_y=0
+
+while(cap.isOpened()):
+    ret, frame = cap.read()
+    gray = cv2.cvtColor(frame,cv2.COLOR_BGR2GRAY)
+
+    
+    p0 = cv2.goodFeaturesToTrack(oldgray, mask = None, **feature_params)
+
+    # calculate optical flow
+    p1, st, err = cv2.calcOpticalFlowPyrLK(oldgray, gray, p0, None, **lk_params)
+
+    # Select good points
+    good_new = p1[st==1]
+    good_old = p0[st==1]
+
+    for i in p0:
+        x,y=i.ravel()
+        cv2.line(frame, (x,y),(x,y), (0,0,255),5)
+
+    one=[]
+    two=[]
+    for i,(new,old) in enumerate(zip(good_new, good_old)):
+        x1,y1=new.ravel()
+        x2,y2=old.ravel()
+        cv2.line(frame, (x1,y1),(x2,y2), (0,255,0),5)
+        one=one+[(x1,y1)]
+        two=two+[(x2,y2)]
+
+    mat = cv2.estimateRigidTransform(gray,oldgray,False)
+    angle = math.atan2(mat[0,1],mat[0,0])
+    stretch = int((math.sqrt(mat[0,1]**2+mat[0,0]**2)-1)*100)
+    print angle/3.141592654*180,'deg\t',stretch,"%\t", mat[0,2],'\t',mat[1,2]
+    height, width, bpp = frame.shape
+    frame2=frame.copy()
+    mat2=cv2.getRotationMatrix2D((width/2,height/2), total_angle/3.141593654*180, 1.) 
+    print mat2.__repr__()
+
+    total_angle=total_angle+angle
+
+#    mat2=numpy.array([[cos(total_angle), sin(total_angle), total_x], [-sin(total_angle),cos(total_angle),total_y]])
+    frame2= cv2.warpAffine(frame2, mat2, (width,height) )
+
+    cv2.imshow('frame', frame)
+    cv2.imshow('frame2', frame2)
+    
+    oldframe=frame
+    oldgray=gray
+
+    if cv2.waitKey(20) & 0xFF == ord("q"):
+        break
-- 
cgit v1.2.3