On Sat, 2021-08-14 at 11:29 -0700, Dave Stevens via users wrote: > Patrick, reading through the thread I wonder if you are not trying to > solve digitally what might be an analog issue. Why not stop by an > opticians shop and see if a simple corrective lens would help. I > suppose you could rig an attachment somehow. While that's essentially true, and I posted before about the reasons why it happens (using an extremely wide-angle lens to try and get a wide angle of view on a tiny sensor), trying to fix that optically faces various hurdles. To fix it externally, you'd need an accurately made and placed lens to counteract the distortions of the camera's built-in lens. To fix it properly, you'd really need one of: * A camera with a less-wide-angle lens, and a larger image sensor, which would mean a less miniaturised webcam on the whole (though not really that much of a problem - it doesn't need to be huge). * A wide-angle lens that's been built to avoid fish-eye distortions, which would mean a more expensive webcam (most of them are knocked up with cheap components and lenses). * A camera that processes the image to change the fish-eye distortion, again a more expensive camera. Many manufactures like to pass the buck on improving their products, getting the computer to handle their problems with software, and needing special drivers. You find that kind of thing a pain when your computer software installation has moved on since they created their webcam, but never updated their own software. Trying to get a very wide angle image on a tiny sensor is hard to do well. Some special lens approaches can remove some of the distortions in just one axis. If you were to look at the walls and roof of a room shot through one of them, you might notice the ceiling looks straight, but the walls are still bowed. And then there's the issue of you might be able to make things look fairly undistorted at one distance from the camera, but if you moved in closer, the distortion comes back again. I work in video production, and this issue has been a problem for decades. Earlier cameras used large image sensors, and good lenses. As the years went on, they kept shrinking the image sensors (yet the studio and on-the-shoulder news cameras stayed virtually the same size, so there was no real need to shrink the sensor). As the sensors got smaller, it became harder and harder to take wide-angle shots indoors. In small rooms you couldn't step back far enough to fit everything in, so you had to use a wider-angle lens. Then when you went outdoors, a wide-angle lens was very susceptible to lens flares getting into the glass. -- uname -rsvp Linux 5.11.22-100.fc32.x86_64 #1 SMP Wed May 19 18:58:25 UTC 2021 x86_64 Boilerplate: All unexpected mail to my mailbox is automatically deleted. I will only get to see the messages that are posted to the mailing list. _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
