From: Alexander Mordvintsev <no@email>
Date: Mon, 6 Jun 2011 03:31:45 +0000 (+0000)
Subject: python cv2 sample: hi-res image browse
X-Git-Tag: accepted/2.0/20130307.220821~2908
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3df5f5e13aeda491ea4884784e30325d3ba9299f;p=profile%2Fivi%2Fopencv.git

python cv2 sample: hi-res image browse
---

diff --git a/samples/python2/browse.py b/samples/python2/browse.py
new file mode 100644
index 0000000..ed2353f
--- /dev/null
+++ b/samples/python2/browse.py
@@ -0,0 +1,38 @@
+'''
+browse.py shows how to implement a simple hi resolution image navigation
+'''
+
+import numpy as np
+import cv2, cv
+import sys
+
+print 'This sample shows how to implement a simple hi resolution image navigation.'
+print 'USAGE: browse.py [image filename]'
+print 
+
+if len(sys.argv) > 1:
+    fn = sys.argv[1]
+    print 'loading %s ...' % fn
+    img = cv2.imread(fn)
+else:
+    sz = 4096
+    print 'generating %dx%d precudural image ...' % (sz, sz)
+    img = np.zeros((sz, sz), np.uint8)
+    track = np.cumsum(np.random.rand(1000000, 2)-0.5, axis=0)
+    track = np.int32(track*20 + (sz/2, sz/2))
+    cv2.polylines(img, [track], 0, 255, 1, cv.CV_AA)
+
+small = img
+for i in xrange(4):
+    small = cv2.pyrDown(small)
+
+def onmouse(event, x, y, flags, param):
+    h, w = img.shape[:2]
+    h1, w1 = small.shape[:2]
+    x, y = 1.0*x*h/h1, 1.0*y*h/h1
+    zoom = cv2.getRectSubPix(img, (800, 600), (x+0.5, y+0.5))
+    cv2.imshow('zoom', zoom)
+
+cv2.imshow('small', small)
+cv.SetMouseCallback('small', onmouse, None)
+cv2.waitKey()