OpenCV (OpenCV-2.3.1-win-superpack.exe) をダウンロードし、python 2.6 で使用します。
私はdirfind_obj.pyからを使用します。OpenCV\samples\python
すべては魔法ですが、コードでエラーが発生した場合にコードをラップするために try except ブロックを使用しても、OpenCV はエラーを出力します。
OpenCV エラー: 不明な関数、ファイル ......\OpenCV-2.3.1\modules\core\src\array.cpp、行 2482 の不正なフラグ (パラメーターまたは構造体フィールド) (認識されないかサポートされていない配列型)
では、OpenCV の警告メッセージを無効にするにはどうすればよいでしょうか。
編集：
これはコードです：
import numpy as np
import cv2
from functools import partial
help_message = '''SURF image match
USAGE: findobj.py [ <image1> <image2> ]
'''
FLANN_INDEX_KDTREE = 1 # bug: flann enums are missing
flann_params = dict(algorithm = FLANN_INDEX_KDTREE, trees = 4)
def anorm(a):
return np.sqrt( anorm2(a) )
def match_bruteforce(desc1, desc2, r_threshold = 0.75):
res = []
for i in xrange(len(desc1)):
dist = anorm( desc2 - desc1[i] )
n1, n2 = dist.argsort()[:2]
r = dist[n1] / dist[n2]
if r < r_threshold:
res.append((i, n1))
return np.array(res)
def match_flann(desc1, desc2, r_threshold = 0.6):
flann = cv2.flann_Index(desc2, flann_params)
idx2, dist = flann.knnSearch(desc1, 2, params = {}) # bug: need to provide empty dict
mask = dist[:,0] / dist[:,1] < r_threshold
idx1 = np.arange(len(desc1))
pairs = np.int32( zip(idx1, idx2[:,0]) )
return pairs[mask]
def draw_match(img1, img2, p1, p2, status = None, H = None):
h1, w1 = img1.shape[:2]
h2, w2 = img2.shape[:2]
vis = np.zeros((max(h1, h2), w1+w2), np.uint8)
vis[:h1, :w1] = img1
vis[:h2, w1:w1+w2] = img2
vis = cv2.cvtColor(vis, cv2.COLOR_GRAY2BGR)
if H is not None:
corners = np.float32([[0, 0], [w1, 0], [w1, h1], [0, h1]])
corners = np.int32( cv2.perspectiveTransform(corners.reshape(1, -1, 2), H).reshape(-1, 2) + (w1, 0) )
cv2.polylines(vis, [corners], True, (255, 255, 255))
if status is None:
status = np.ones(len(p1), np.bool_)
green = (0, 255, 0)
red = (0, 0, 255)
for (x1, y1), (x2, y2), inlier in zip(np.int32(p1), np.int32(p2), status):
col = [red, green][inlier]
if inlier:
cv2.line(vis, (x1, y1), (x2+w1, y2), col)
cv2.circle(vis, (x1, y1), 2, col, -1)
cv2.circle(vis, (x2+w1, y2), 2, col, -1)
else:
r = 2
thickness = 3
cv2.line(vis, (x1-r, y1-r), (x1+r, y1+r), col, thickness)
cv2.line(vis, (x1-r, y1+r), (x1+r, y1-r), col, thickness)
cv2.line(vis, (x2+w1-r, y2-r), (x2+w1+r, y2+r), col, thickness)
cv2.line(vis, (x2+w1-r, y2+r), (x2+w1+r, y2-r), col, thickness)
return vis
def search(fn1, fn2):
try:
img1 = cv2.imread(fn1, 0)
img2 = cv2.imread(fn2, 0)
surf = cv2.SURF(1000)
kp1, desc1 = surf.detect(img1, None, False)
kp2, desc2 = surf.detect(img2, None, False)
desc1.shape = (-1, surf.descriptorSize())
desc2.shape = (-1, surf.descriptorSize())
def match_and_draw(match, r_threshold):
try:
m = match(desc1, desc2, r_threshold)
matched_p1 = np.array([kp1[i].pt for i, j in m])
matched_p2 = np.array([kp2[j].pt for i, j in m])
H, status = cv2.findHomography(matched_p1, matched_p2, cv2.RANSAC, 5.0)
vis = draw_match(img1, img2, matched_p1, matched_p2, status, H)
return vis
except:
pass
vis_brute = match_and_draw( match_bruteforce, .9 )
#vis_flann = match_and_draw( match_flann, 0.6 ) # flann tends to find more distant second # neighbours, so r_threshold is decreased
if vis_brute != None:
cv2.imshow('find_obj SURF', vis_brute)
#cv2.imshow('find_obj SURF flann', vis_flann)
return True
else:
return False
except:
return False
print search('obj.png', 'pass.png')
print search('obj.png', 'fail.png')
検索が成功した場合はより大きな画像で画像（obj.png）を検索しますが、失敗した場合は常にエラーを出力します。
EDIT2
これはdllリストです
C:\Python26\Lib\site-packages>dir opencv*
Volume in drive C has no label.
Volume Serial Number is BE63-8A7C
Directory of C:\Python26\Lib\site-packages
08/17/2011 08:27 AM 743,936 opencv_calib3d231.dll
08/17/2011 08:27 AM 547,328 opencv_contrib231.dll
08/17/2011 08:26 AM 6,595,072 opencv_core231.dll
08/17/2011 08:27 AM 878,080 opencv_features2d231.dll
08/17/2011 08:28 AM 7,417,192 opencv_ffmpeg.dll
08/17/2011 08:26 AM 395,264 opencv_flann231.dll
08/17/2011 08:27 AM 221,184 opencv_gpu231.dll
08/17/2011 08:27 AM 891,904 opencv_highgui231.dll
08/17/2011 08:26 AM 1,648,128 opencv_imgproc231.dll
08/17/2011 08:27 AM 761,856 opencv_legacy231.dll
08/17/2011 08:26 AM 451,584 opencv_ml231.dll
08/17/2011 08:27 AM 903,168 opencv_objdetect231.dll
08/17/2011 08:51 AM 335 opencv_python-2.3.1-py2.6.egg-info
08/17/2011 08:26 AM 566,272 opencv_ts231.dll
08/17/2011 08:27 AM 288,768 opencv_video231.dll
15 File(s) 22,310,071 bytes
0 Dir(s) 37,611,061,248 bytes free