@Bleach665 interesting function, thanks! Could you add notes to the project documentation to promote the feature. Users do not know about that and cannot get it without documentation.

@asmorkalov,

Could you add notes to the project documentation

Of course, but please lead me to example what the documentation should look like.
In our case it's just another button on the panel.

By clicking on it, we copy the image to the clipboard. Also "Ctrl+C" keyboard shortcut can be used.

You can extend this page that is generated for this header file preambule. In addition you can extend cv::imshow documentation and add note about backend specific functionality like it's done for cv::imread.
Also, please take a look on CI status, CI Bot reports trailing white spaces issue: https://pullrequest.opencv.org/buildbot/builders/precommit_docs/builds/24017/steps/whitespace%20opencv/logs/stdio

Thank you for contribution!

There is no documentation for any of other Qt U/I buttons. So my suggestion is to avoid adding them (perhaps separate page/tutorial would be better).

Please fix "Docs" whitespace warnings and rebase onto 3.4 branch.
We will merge changes from 3.4 into master regularly (weekly/bi-weekly).

So, please:

• change "base" branch of this PR: master => 3.4 (use "Edit" button near PR title)
• rebase your commits from master onto 3.4 branch. For example:
  git rebase -i --onto upstream/3.4 upstream/master
  (check list of your commits, save and quit (Esc + "wq" + Enter)
  where upstream is configured by following this GitHub guide and fetched (git fetch upstream).
• push rebased commits into source branch of your fork (with --force option)

Note: no needs to re-open PR, apply changes "inplace".

Repair branch:

$ git checkout -B Qt_imshow_clipbrd 9db999eac29f42e8c3b1356b09b884174b1f7ed5

and try again.

Ok. thanks