4.x
Merge remote-tracking branch 'origin/3.4' into merge-3.4
Update js_image_arithmetics.markdown
Merge pull request #18064 from akineeic:gsoc_2020_dnn
Fixing code example on js_image_display markdown
Merge remote-tracking branch 'upstream/3.4' into merge-3.4
Merge pull request #9466 from huningxin:js
Merge pull request #25042 from mshabunin:doc-upgrade
Update name from Gunner to Gunnar as that's the name he published his paper under.