Repository: opencv
Issue: [feature request]: Save exif information
Labels: feature,priority: low,category: imgcodecs

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##### System information (version)
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- OpenCV => 4.2
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- OpenCV => 4.5.1
- Operating System / Platform => Centos
- Compiler => g++

##### Detailed description

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Hi, I came form here: https://forum.opencv.org/t/why-opencv-lost-exif-infomation-of-jpeg/8139

I have a feature request. I use opencv do some specific actions, but whether use exif to rotate image rely to client’s behavior. So I need exif after image transform by OpenCV.

Could you support to save exif information? Maybe have a new flag in ImreadModes.

Thanks!


##### Steps to reproduce

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