cv2.error: OpenCV(4.5.3) :-1: error: (-5:Bad argument) in function ‘line‘＞ Overload resolution fail

opencv-python学习-几何形状拟合的报错----附上个人报错后修改的小意见

下方是源程序

#coding:utf-8

import cv2
import numpy as np

def draw_rect(img_file, points):
    img = cv2.imread(img_file)
    center, size, angle = cv2.minAreaRect(points)   #中心点坐标，尺寸，旋转角度
    print(center, size, angle)
    vertices= cv2.boxPoints((center, size, angle))
    print(vertices)

    for i in range(4):
        point1 = vertices[i, :]
        point2 = vertices[(i+1)%4, :]
        cv2.line(img, tuple(point1), tuple(point2), (0, 0, 255), 2)

    cv2.imshow("img", img)
    cv2.waitKey(0)
    cv2.destroyAllWindows()

if __name__ == "__main__":
    img_file = r"D:\data\timg.jpg"

    points1 = np.array([[154, 154],[253, 171], [154, 176],[248, 204]], np.int32)  # 数据类型为int32或者float32
    draw_rect(img_file, points1)


    # points2 = np.array([[148, 171], [247, 153], [253, 186], [154, 204]], np.int32)
    # draw_rect(img_file, points2)
minAreaRect()

运行后会出现关于数据类型的报错---错误在cv2.line(img,tuple(point1),tuple(point2), (0,0,255), 2)的列表数据类型有误 该处指向的是整数型 但是代码中的vertices为float型 需要进行数据转换

 

(201.0, 179.00001525878906) (101.1060562133789, 33.37017059326172) 9.743640899658203
[[148.35242 186.88881]
 [154.      154.00002]
 [253.64758 171.11122]
 [248.      204.00002]]
Traceback (most recent call last):
  File "F:\py3e_source\chapter11\eyeganzhi4.py", line 27, in 
    draw_rect(img_file, points1)
  File "F:\py3e_source\chapter11\eyeganzhi4.py", line 16, in draw_rect
    cv2.line(img,tuple(point1),tuple(point2), (0,0,255), 2)
cv2.error: OpenCV(4.5.3) :-1: error: (-5:Bad argument) in function 'line'
> Overload resolution failed:
>  - Can't parse 'pt1'. Sequence item with index 0 has a wrong type
>  - Can't parse 'pt1'. Sequence item with index 0 has a wrong type

此处为我修改过后的示例：（列表数据转换有多种 此处仅列举一种）

import cv2
import numpy as np

def draw_rect(img_file, points):
    img = cv2.imread(img_file)
    center, size, angle = cv2.minAreaRect(points)   #中心点坐标，尺寸，旋转角度
    print(center, size, angle)
    vertices= cv2.boxPoints((center, size, angle))
    print(vertices)

    for i in range(4):
        point1 = vertices[i, :]
        point1 = [int(j) for j in point1]
        print(point1)
        point2 = vertices[(i+1)%4, :]
        point2 = [int(j) for j in point2]
        cv2.line(img,tuple(point1),tuple(point2), (0,0,255), 2)
        

    cv2.imshow("img", img)
    cv2.waitKey(0)
    cv2.destroyAllWindows()

if __name__ == "__main__":
    img_file = r"tlgd.jpg"

    points1 = np.array([[154, 154],[253, 171], [154, 176],[248, 204]], np.int32)  # 数据类型为int32或者float32
    draw_rect(img_file, points1)

改正后程序可以正常运行！！！

今天你学废了吗！！！