当我运行cv2.HoughCircles()时,我收到错误
Traceback (most recent call last):
File "cv.py", line 1, in <module>
import cv2,cv
File "/home/jestinjoy/cv.py", line 19, in <module>
circles = np.uint16(np.around(circles))
File "/usr/lib/pymodules/python2.7/numpy/core/fromnumeric.py", line 2277, in around
return _wrapit(a, 'round', decimals, out)
File "/usr/lib/pymodules/python2.7/numpy/core/fromnumeric.py", line 37, in _wrapit
result = getattr(asarray(obj),method)(*args, **kwds)
AttributeError: rint
我的代码是
GNU nano 2.2.6文件:cv.py
import cv2,cv
import numpy as np
cv2.namedWindow("preview")
vc = cv2.VideoCapture(0)
if vc.isOpened(): # try to get the first frame
rval, frame = vc.read()
else:
rval = False
while rval:
cv2.imshow("preview", frame)
rval, frame = vc.read()
img = cv2.medianBlur(frame,5)
imgg = cv2.cvtColor(img, cv2.COLOR_RGB2GRAY)
cimg = cv2.cvtColor(imgg,cv2.COLOR_GRAY2BGR)
circles = cv2.HoughCircles(imgg,cv2.cv.CV_HOUGH_GRADIENT,1,10,param1=100,param2=30,minRadius=5,maxRadius=20)
circles = np.uint16(np.around(circles))
for i in circles[0,:]:
cv2.circle(cimg,(i[0],i[1]),i[2],(0,255,0),1) # draw the outer circle
cv2.circle(cimg,(i[0],i[1]),2,(0,0,255),3) # draw the center of the circle
key = cv2.waitKey(20)
if key == 27: # exit on ESC
break
cv2.destroyWindow("preview")
答案 0 :(得分:1)
您没有检查圈子是否为无。如果你这样做,它可以工作:
import cv2
import numpy as np
cv2.namedWindow("preview")
vc = cv2.VideoCapture(0)
if vc.isOpened(): # try to get the first frame
rval, frame = vc.read()
else:
rval = False
while rval:
cv2.imshow("preview", frame)
cv2.waitKey(1)
rval, frame = vc.read()
img = cv2.medianBlur(frame,5)
imgg = cv2.cvtColor(img, cv2.COLOR_RGB2GRAY)
cimg = cv2.cvtColor(imgg,cv2.COLOR_GRAY2BGR)
circles = cv2.HoughCircles(imgg,cv2.cv.CV_HOUGH_GRADIENT,1,10,param1=100,param2=30,minRadius=5,maxRadius=20)
if circles is None:
continue
print circles
#circles = np.uint16(np.around(circles))
for i in circles[0,:]:
cv2.circle(cimg,(i[0],i[1]),i[2],(0,255,0),1) # draw the outer circle
cv2.circle(cimg,(i[0],i[1]),2,(0,0,255),3) # draw the center of the circle
key = cv2.waitKey(20)
if key == 27: # exit on ESC
break
cv2.destroyWindow("preview")
生成的输出:
sam@tuwien:/tmp$ python cv.py
VIDIOC_QUERYMENU: Invalid argument
VIDIOC_QUERYMENU: Invalid argument
VIDIOC_QUERYMENU: Invalid argument
VIDIOC_QUERYMENU: Invalid argument
VIDIOC_QUERYMENU: Invalid argument
VIDIOC_QUERYMENU: Invalid argument
VIDIOC_QUERYMENU: Invalid argument
[[[ 335.5 368.5 10.12422848]]]
[[[ 334.5 386.5 10.12422848]]]
[[[ 349.5 382.5 10.12422848]]]
[[[ 392.5 365.5 10.12422848]]]
[[[ 378.5 370.5 10.12422848]]]
[[[ 378.5 368.5 12.34908867]]]
[[[ 391.5 369.5 14.57738018]]]
[[[ 379.5 370.5 10.12422848]]]
答案 1 :(得分:0)
Sam是对的,但是他的节目并没有画出圈子。这是一个修复:
import cv2
import numpy as np
cv2.namedWindow("preview")
vc = cv2.VideoCapture(0)
if vc.isOpened(): # try to get the first frame
rval, frame = vc.read()
else:
rval = False
while rval:
cv2.waitKey(1)
rval, frame = vc.read()
img = cv2.medianBlur(frame,5)
imgg = cv2.cvtColor(img, cv2.COLOR_RGB2GRAY)
cimg = cv2.cvtColor(imgg,cv2.COLOR_GRAY2BGR)
circles = cv2.HoughCircles(imgg,cv2.cv.CV_HOUGH_GRADIENT,1,10,param1=100,param2=30,minRadius=5,maxRadius=20)
if circles is None:
cv2.imshow("preview", frame)
continue
#circles = np.uint16(np.around(circles))
for i in circles[0,:]:
print i
cv2.circle(frame,(i[0],i[1]),i[2],(0,255,0),1) # draw the outer circle
cv2.circle(frame,(i[0],i[1]),2,(0,0,255),3) # draw the center of the circle
cv2.imshow("preview", frame)
key = cv2.waitKey(20)
if key == 27: # exit on ESC
break
cv2.destroyWindow("preview")
答案 2 :(得分:0)
此代码需要进行一些更改,可能是由于相同的更新(显然是在2年前询问过) 所以我使用ret而不是rval以及cv2.HoughCircles属性的一些变化 按q退出。
import cv2
import numpy as np
cv2.namedWindow("preview")
vc = cv2.VideoCapture(0)
if vc.isOpened(): # try to get the first frame
ret, frame = vc.read()
else:
ret = False
while True :
ret, frame = vc.read()
img = cv2.medianBlur(frame,15)
imgg = cv2.cvtColor(img, cv2.COLOR_RGB2GRAY)
cimg = cv2.cvtColor(imgg,cv2.COLOR_GRAY2BGR)
circles = cv2.HoughCircles(imgg,cv2.HOUGH_GRADIENT,1,120,param1=100,param2=30,minRadius=20,maxRadius=200)
if circles is None:
cv2.imshow("preview", frame)
continue
#circles = np.uint16(np.around(circles))
for i in circles[0,:]:
print i
cv2.circle(frame,(i[0],i[1]),i[2],(0,255,0),1) # draw the outer circle
cv2.circle(frame,(i[0],i[1]),2,(0,0,255),3) # draw the center of the circle
cv2.imshow("preview", frame)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
vc.release()
cv2.destroyWindow("preview")