Re: 1 shot parobole mirror - on HD capable DSLR ( like Canon 5D )
- Hi Jann,
--- In PanoToolsNG@yahoogroups.com, "jann_lipka" <jann@...> wrote:
> Have you tried to unwrap donut mirror image and extract it to
> ( i'm aware that it is going to be small size )
> interactive 120x 360 video ? )
Jim Watters forwarded me some experimental code to do this in panotools but I have not got around to play with it.
There was some software that came with the lens. I tested it on a still image (8mpx) when I bought it, then forgot about it because I had no practical use.
IIRC there is also a script or plugin for Photoshop that does video, but back then I did not do video. I also think it requires a higher version of Photoshop than what I have.
The biggest obstacle to dewarp the donuts is that there are many different mirror shapes and each requires its own math/parameters.
Then there is the sun. I am impressed by the quality of the video posted by Alexandre. When I was shooting a scene with sunlight hitting directly at the mirror, I had nasty vertical lines.
Last but not least, the application. One thing is showing the full 360° on HD (360° = 1280px) or FullHD (360° = 1920px). If you want an interactive panoramic view where the user can pan/tilt and maybe even zoom, it will hit very quickly the resolution limit. It's a bit more forgiving for moving images than for stills. What I recall from my still experiments with the 8mpx sensor, showing a 90° HFOV partial view from the donut on a 1024x768 screen was disappointing. It was good for "thumbs-panos" (e.g. cheap crappy real estate throw-aways displayed in java at 320px wide). The unwarped equirect from the 8mpx camera was something like 2400px horizontally.