Question

我已经显示了下面的代码，但是当我尝试执行它时，请

Traceback (most recent call last):
  File "/home/decentmakeover2/Code/cv.py", line 22, in <module>
    img = cv2.circle(img,center, radius, (0,255, 0), 2)
TypeError: integer argument expected, got float

我不确定问题是什么，在minEnclosingCircle中，值已经转换为int，但我仍然得到相同的错误，关于可能出现什么问题的任何想法？

import numpy as np
import cv2
import os
from scipy import ndimage

img = cv2.pyrDown(cv2.imread('img.jpeg'))
ret, thresh  = cv2.threshold(cv2.cvtColor(img.copy(), 
cv2.COLOR_BGR2GRAY), 
127, 255, cv2.THRESH_BINARY)
image, contours, heir = cv2.findContours(thresh, cv2.RETR_EXTERNAL, 
cv2.CHAIN_APPROX_SIMPLE)

for c in contours:
  x, y ,w ,h = cv2.boundingRect(c)
  cv2.rectangle(img, (x,y), (x+w, y+h), (0, 255, 0), 2)

  rect  = cv2.minAreaRect(c)
  box = cv2.boxPoints(rect)
  box  = np.int0(box)
  cv2.drawContours(img, [box], 0 , (0, 0, 255), 3)

  (x,y), radius = cv2.minEnclosingCircle(c)
  center = (int(x), int(y))
  raduis = int(radius)
  img = cv2.circle(img,center, radius, (0,255, 0), 2)

cv2.drawContours(img, contours, -1, (255, 0, 0), 1)   
cv2.imshow('contours',img)
cv2.waitKey(0)
cv2.destroyAllWindows()`

Answer 1

我对您的代码进行了一些小改动，以便将浮点数转换为整数。它现在运行没有错误。检查一下：

import numpy as np
import cv2
import os
from scipy import ndimage

img = cv2.pyrDown(cv2.imread('img.jpeg'))
ret, thresh  = cv2.threshold(cv2.cvtColor(img.copy(), cv2.COLOR_BGR2GRAY), 127, 255, cv2.THRESH_BINARY)
image, contours, heir = cv2.findContours(thresh, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)

for c in contours:
    x, y ,w ,h = cv2.boundingRect(c)
    cv2.rectangle(img, (x,y), (x+w, y+h), (0, 255, 0), 2)

    rect  = cv2.minAreaRect(c)
    box = cv2.boxPoints(rect)
    box  = np.int0(box)
    cv2.drawContours(img, [box], 0 , (0, 0, 255), 3)

    (x,y), radius = cv2.minEnclosingCircle(c)
    x = np.round(x).astype("int")
    y = np.round(y).astype("int")
    center = (x,y)
    radius = np.round(radius).astype("int")
    cv2.circle(img, center, radius, (0,255, 0), 2)

cv2.drawContours(img, contours, -1, (255, 0, 0), 1)   
cv2.imshow('contours',img)
cv2.waitKey(0)
cv2.destroyAllWindows()

Answer 2

按如下所示修改代码，不需要使用cv2.circle的返回值。

readdir()

Answer 3

这个答案可能为时已晚，但是我发现cv2.circle只能接受中心精度为float32的坐标。如果坐标在float64中，它将抛出此错误。简单的解决方案是始终将中心坐标转换为numpy.float32。

整数参数期望int在opencv中浮动

3 个答案: