[whatwg] Dealing with Stereoscopic displays
webmartians at verizon.net
Wed Apr 28 09:25:35 PDT 2010
... not to complicate matters, but there is a similar uncertainty
regarding immersion imaging (Google's StreetView). Currently, it's done
with plugins (usually Flash, sometimes QuickTime and only occasionally
fast enough, with <canvas>, to do this kind of rendering.
Can something similar be done for 3D? ...as to how to synchronize the
glasses, I haven't a clue.
Maybe we need a fourth "color" (depth) for JPEG ... hmmm ... make that a
"fifth color" ... in line behind alpha/transparency.
Eoin Kilfeather wrote:
> Hi Rob, all,
> Fair enough :-) I'll have to try better. Rob you give some good
> examples (WebGL and CSS3) of how an application could be built which
> correctly renders two views with stereopsis. However, with the
> exception of Anaglyph methods, a user will need specialised display
> hardware to properly view the image. So, to clarify, the issue is not
> the rendering of the stereo views (I'll worry about that later) but
> rather how those views are targeted to the correct virtual display
> (for example by alternating the left and right views on odd and even
> frames). If we take the case of the Blu-Ray 3D specification it is
> neutral about how the hardware is implemented, but the hardware is
> expected to respect the flags indicating whether a frame is for the
> left or right virtual display. In order to work with HTML the UA has
> to have some awareness of the hardware and way of signalling with view
> is for which virtual display. My question is, how can this be done in
> a consistent manner? Given that this usually requires some hardware
> control, is a good approach to use the <device> element?
> I hope this is a little clearer.
> Best regards,
> On Tue, Apr 27, 2010 at 10:01 AM, Robert O'Callahan
> <robert at ocallahan.org <mailto:robert at ocallahan.org>> wrote:
> On Tue, Apr 27, 2010 at 8:38 PM, Eoin Kilfeather
> <ekilfeather at dmc.dit.ie <mailto:ekilfeather at dmc.dit.ie>> wrote:
> * A user visits the National Museum site and wants to see a
> time-machine view of objects in the collection with a sense of 3D
> depth based on their age
> I think this is the closest you get to an actual use-case :-). The
> rest is mixed up with information about possible solutions. Also,
> it's highly unlikely the a user will visit your site with a fully
> formed desire to view objects in a collection with a sense of 3D
> depth based on their age :-).
> But let's say the authors of that site want to visualize objects
> in the collection with different objects at different depths. It
> seems to me either WebGL or CSS 3D transforms --- or a mixture ---
> could be used for this, maybe with some extra information provided
> to identity the camera positions for rendering the stereo views.
> Actually, I probably shouldn't be involved in this discussion
> since I'm monocular :-).
> "He was pierced for our transgressions, he was crushed for our
> iniquities; the punishment that brought us peace was upon him, and
> by his wounds we are healed. We all, like sheep, have gone astray,
> each of us has turned to his own way; and the LORD has laid on him
> the iniquity of us all." [Isaiah 53:5-6]
> Eoin Kilfeather
> Digital Media Centre
> Dublin Institute of Technology
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