def findall(search_file, image_file, threshold=0.8, maxcnt = 0, rgb=False, bgremove=False):
'''
Locate image position with cv2.templateFind
Use pixel match to find pictures.
Args:
search_file(string): filename of search object
image_file(string): filename of image to search on
threshold: optional variable, to ensure the match rate should >= threshold
maxcnt: maximun count of searched points
Returns:
A tuple of found points ((x, y), ...)
Raises:
IOError: when file read error
'''
# method = cv2.TM_CCORR_NORMED
# method = cv2.TM_SQDIFF_NORMED
method = cv2.TM_CCOEFF_NORMED
search = _cv2open(search_file)
image_ = _cv2open(image_file)
if rgb:
s_bgr = cv2.split(search) # Blue Green Red
i_bgr = cv2.split(image_)
weight = (0.3, 0.3, 0.4)
resbgr = [0, 0, 0]
for i in range(3): # bgr
resbgr[i] = cv2.matchTemplate(i_bgr[i], s_bgr[i], method)
res = resbgr[0]*weight[0] + resbgr[1]*weight[1] + resbgr[2]*weight[2]
else:
s_gray = cv2.cvtColor(search, cv2.COLOR_BGR2GRAY)
i_gray = cv2.cvtColor(image_, cv2.COLOR_BGR2GRAY)
if bgremove:
s_gray = cv2.Canny(s_gray, 100, 200)
i_gray = cv2.Canny(i_gray, 100, 200)
if DEBUG:
toolbox.showImage(s_gray)
toolbox.showImage(i_gray)
res = cv2.matchTemplate(i_gray, s_gray, method)
# toolbox.showImage(res)
w, h = search.shape[1], search.shape[0]
points = []
while True:
min_val, max_val, min_loc, max_loc = cv2.minMaxLoc(res)
if method in [cv2.TM_SQDIFF, cv2.TM_SQDIFF_NORMED]:
top_left = min_loc
else:
top_left = max_loc
print 'templmatch_value(thresh:%.1f) = %.3f' %(threshold, max_val) # not show debug
if max_val < threshold:
break
middle_point = (top_left[0]+w/2, top_left[1]+h/2)
points.append(middle_point)
if maxcnt and len(points) >= maxcnt:
break
# floodfill the already found area
cv2.floodFill(res, None, max_loc, (-1000,), max_val-threshold+0.1, 1, flags=cv2.FLOODFILL_FIXED_RANGE)
return points
points.append(middle_point)
if maxcnt and len(points) >= maxcnt:
break
# floodfill the already found area
cv2.floodFill(res, None, max_loc, (-1000,), max_val-threshold+0.1, 1, flags=cv2.FLOODFILL_FIXED_RANGE)
return points
if __name__ == '__main__':
search_file, image_file = 'imgs/me2.png', 'imgs/timer.png'
search_file, image_file = 'imgs/hand.png', 'imgs/hand_map.png'
search_file, image_file = 'imgs/back.png', 'imgs/back_map.png'
search_file, image_file = 'imgs/plus.png', 'imgs/back_map.png'
search_file, image_file = 'imgs/minus.png', 'imgs/back_map.png'
search_file, image_file = 'imgs/minus_add.png', 'imgs/back_map.png'
# dst = cv2.resize(sf, (0, 0), fx = 4, fy=4)
threshold = 0.7
positions = findall(search_file, image_file, threshold, maxcnt=9)
print 'point_count =', len(positions or []), positions
if positions:
w, h = cv2.imread(search_file, 0).shape[::-1]
img = cv2.imread(image_file)
for (x, y) in positions:
img = toolbox.markPoint(img, (x, y))
toolbox.showImage(img)
else:
print 'No points founded'