Live data from Hacker News

Poor man's document camera for videoconference

info.iet.unipi.it

1–10 of 58 posts

Re: Poor man's document camera for videoconference

#4
Reminds me a kickstarter project I backed years ago called ScanBox. I still pull it out from time to time to scan documents when traveling, and have used it once or twice for a live document scanner, though the sides of the box make it difficult to get your hand into.

These days our team either uses the built-in whiteboard functionality in Zoom, or jump into a Google Drawing or Slides document for the live collaboration.

Sometimes I'll also use Zoom's AirPlay functionality to share my iPad screen and use an app like Notability to share. Though that's only one-way and not collabarative.

Re: Poor man's document camera for videoconference

#7
post #6

Re. orientation: the phone shouldn't be trying to determine landscape/portrait when flat; it should gracefully keep the previous state for at least a dozen degrees. On my 11 Pro it doesn't change until ~40 degrees of attitude.

In Android there's an option to lock orientation.

Re: Poor man's document camera for videoconference

#8
In these situations where you're taking a photograph of writing or a diagram on a piece of paper, it can be surprisingly tricky to get rid of the shading from the lighting conditions and be left with just the content on the page in high contrast.

This explanation nails how to do it though: http://www.imagemagick.org/Usage/compose/#divide

Divide a blurred copy by the original and you end up with effectively an adaptive-normalize filter where the result is nice and clear with the shadows and uneven lighting left behind.

Also though, there are tools like https://miro.com and https://beta.plectica.com which kinda make this obsolete for many common use cases.

Re: Poor man's document camera for videoconference

#9

What's more valuable: The box of pasta or the roll of coins providing a counterweight?

That's what I thought. Surely you could buy 10 professional document cameras for the value of that pasta! :-)

At least this design doesn't need TP.

Re: Poor man's document camera for videoconference

#10
post #7
post #6

Re. orientation: the phone shouldn't be trying to determine landscape/portrait when flat; it should gracefully keep the previous state for at least a dozen degrees. On my 11 Pro it doesn't change until ~40 degrees of attitude.

In Android there's an option to lock orientation.

There's one in iOS as well.
Post reply on HN