wechat_qrcode 无法识别白色黑底二维码

[pei625569]

【问题】：使用最新的opencv 4.x分支，和当前仓库的4.x分支编译出的iOS平台的opencv2.framework，使用wechat_qrcode无法识别白色黑底二维码。

【编译环境】：
OpenCV => commit：97c021b17af1d40a11515c3b8e7a491a36aa4d6c
操作系统 => MacOS Monterey 12.6
Xcode => 14.2 (14C18)
python => 3.9.6
CMake => 3.24.0

System information (version)

Detailed description

Steps to reproduce

Issue submission checklist

• I report the issue, it's not a question
• I checked the problem with documentation, FAQ, open issues,
  forum.opencv.org, Stack Overflow, etc and have not found any solution
• I updated to the latest OpenCV version and the issue is still there
• There is reproducer code and related data files: videos, images, onnx, etc