将HoughCircles与Python OpenCV结合使用时出现错误，提示缺少模块 [英] I get a error when using HoughCircles with Python OpenCV that a module is missing

问题描述

我有一个小的测试代码块，试图处理其中一个带球的简单照片:

I have a small test code block trying to process a simple photo with a ball in it:

#!/usr/local/bin/python
import cv2
import numpy as np

img = cv2.imread("b.jpg")
gray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
circles = cv2.HoughCircles(gray,cv2.CV_HOUGH_GRADIENT)

当我尝试运行此命令时，我得到:

When I try to run this I get:

AttributeError:模块"对象没有属性"HOUGH_GRADIENT"

AttributeError: 'module' object has no attribute 'HOUGH_GRADIENT'

我已经安装和重新安装了两天，试图找出问题所在. 任何帮助或指示，将不胜感激！

I've been installing and reinstalling for two days trying to figure out whats wrong. Any help or pointers would be appreciated!

推荐答案

添加以下行:import cv2.cv as cv并更改circles

circles = cv2.HoughCircles(gray,cv.CV_HOUGH_GRADIENT)

即cv.CV_HOUGH_GRADIENT代替cv2.CV_HOUGH_GRADIENT

这将解决您得到的AttributeError，但仍然会出现类型错误，您必须为dp和minDist提供参数 (位置3和位置4的参数)​​，您可以据此给出.(这里我给出了1和10)

This will solve the AttributeError that you were getting but still you'll get a type error, you'll have to provide arguments for dp and minDist (arguments at pos 3 and pos 4) and that you can give accordingly.(Here I've given 1 and 10)

#!/usr/local/bin/python
import cv2
import cv2.cv as cv
import numpy as np

img = cv2.imread("test.jpg")
gray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
circles = cv2.HoughCircles(gray,cv.CV_HOUGH_GRADIENT, 1, 10)

还请参见此处解决的类似问题:

also please see a similar problem solved here:

http://answers.opencv.org/question/1497/errors-with-cv2houghcircles/

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