python - 函数 'drawMarker' 中的错误 : (-215:Assertion failed) id < bytesList. 行

Question

这是生成 4 个具有给定 id 的 aruco 标记并将其保存到同一文件夹中的代码。这是当我运行相同的函数生成多个 aruco 标记时的错误

import numpy
import cv2
import cv2.aruco as aruco
i=1

def aruco_gen(id_aruco, num_pixels):
  global i

  aruco_dict = aruco.Dictionary_get(aruco.DICT_4X4_50)
  print(i)                                                       
  img = aruco.drawMarker(aruco_dict, id_aruco, num_pixels)


  cv2.imshow('frame',img)
  cv2.imwrite('ArUco'+str(id_aruco)+'.jpg',img)
  i=i+1
  cv2.waitKey(0)  
  cv2.destroyAllWindows()


if __name__ == "__main__": 

  aruco_dict={0:[10,400],1:[49,400],2:[74,400],3:[190,400],4:[180,400]}   


  for ar_id,ar_arg in aruco_dict.items():
  id_aruco  =aruco_dict[ar_id][0]
  num_pixels=aruco_dict[ar_id][1]
  aruco_gen(id_aruco,num_pixels)
  print(id_aruco,num_pixels,ar_id)

这是我运行程序时遇到的错误

 1
 10 400 0
 2
 49 400 1
 3

Traceback (most recent call last): File "/home/mighty/Task1.1_test.py", line 98, in aruco_gen(id_aruco,num_pixels) File "/home/mighty/Task1.1_test.py", line 67, in aruco_gen img = aruco.drawMarker(aruco_dict, id_aruco, num_pixels) cv2.error: OpenCV(3.4.2) /io/opencv_contrib/modules/aruco/src/dictionary.cpp:169: error: (-215:Assertion failed) id < bytesList.rows in function 'drawMarker'

[Finished in 1.7s with exit code 1] [shell_cmd: /usr/bin/env python3 /home/mighty/Task1.1_test.py] [dir: /home/mighty/] [path: /home/mighty/bin:/home/mighty/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin]

Answer 1

所以，答案如下:
首先，我认为您对字典的定义是错误的 - 请尝试使用以下内容:

aruco_dict = aruco.getPredefinedDictionary(aruco.DICT_4X4_50)

第二个是DICT_4X4_50被限制为id<=50(不确定是从0还是1开始)。