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

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