-215 opencv type_error ai_generated true

cv::error: (-215:断言失败) distCoeffs.type() == CV_32FC1 || distCoeffs.type() == CV_64FC1 在函数 'undistortPoints' 中

cv::error: (-215:Assertion failed) distCoeffs.type() == CV_32FC1 || distCoeffs.type() == CV_64FC1 in function 'undistortPoints'

ID: opencv/undistort-points-empty

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88%修复率
87%置信度
1证据数
2023-09-10首次发现

版本兼容性

版本状态引入弃用备注
4.5.0 active — — —
4.8.0 active — — —
4.10.0 active — — —

根因分析

传递给 cv::undistortPoints 的畸变系数矩阵必须为 CV_32FC1 或 CV_64FC1 类型；其他类型会导致断言失败。

English

The distortion coefficients matrix passed to cv::undistortPoints must be of type CV_32FC1 or CV_64FC1; other types cause an assertion failure.

generic

官方文档

https://docs.opencv.org/4.x/d9/d0c/group__calib3d.html#ga55b3f9b9c3f0c9b8e1f0a5b7c3e1f

解决方案

  1. 将 distCoeffs 转换为 CV_32FC1：distCoeffs.convertTo(distCoeffs, CV_32F);
  2. 如果没有畸变，传递零矩阵：cv::Mat::zeros(1, 5, CV_64FC1) 或 cv::Mat::zeros(1, 8, CV_64FC1)。

无效尝试

常见但无效的做法:

  1. 90% 失败

    The function expects a single-channel matrix for distortion coefficients; multi-channel types are not accepted and trigger the assertion.

  2. 70% 失败

    An empty Mat has type CV_8UC1 by default; the assertion fails because it is neither CV_32FC1 nor CV_64FC1. Use cv::Mat() with proper type or a zero matrix.