lianst

Results 4 issues of lianst

A new PR based on the top of 4.x and fix the conflicts related issus https://github.com/opencv/opencv_contrib/issues/3343 ### Pull Request Readiness Checklist See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request - [x] I agree to...

bug
feature
category: samples
category: wechat_qrcode

there is a [fix](https://github.com/opencv/opencv_contrib/pull/3342)

added a loop of loading image to convert all images

分别报以下错误: 一、 问题:trt安装失败 解决方案:pip install pip==21.3.1 二、 问题:No module named 'onnxconverter_common' 解决办法:pip install onnxconverter-common