On Fri, 11 Jul 2025 08:33:30 GMT, James Dow Allen wrote:
Couldn't see "squat." Wondered if it was a stereoscopic image like https://www.hidden-3d.com/index.php?id=gallery&oid=&pk=464 (and thought
it would be very clever to design such from coffee beans!)
but No.
Just beans for me...
How many of you can focus easily to see the 3-D image embedded in a stereoscopic image? Some people seem to have great difficulty.
Generally I can.
I did make a few autostereograms a long time ago (forty years?) on an
Atari ST microcomputer using software described in a paper from Bradford University(?), UK. The printed paper arrived in the post - it was before
the Internet became ubiquitous.
The image size, image resolution, viewing distance, pattern repetition
distance and pixel offset need to be such that it is comfortable for a
viewer to see the embedded image. The viewer needs two reasonably
functioning eyes too.
Web based autostereograms probably should have a recommended screen size / resolution and viewing distance. What works on a big screen isn't going to comfortably work on a phone's small screen.
--
David Entwistle
--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)