P3D Re: Reading JPS files on Macintoshes

["Greg Wageman" <gjw@xxxxxxxxxx>]

From: Jim Crowell <crowell@xxxxxxxxxxxxxxx>


>If you mean with the flexibility of DepthCharge, then I'm pretty sure
>the answer is "no".  But since JPS files are just side-by-side JPEG
>images, you can open them in any program that will open JPEGs:
>JPEGView, PhotoShop, GraphicConverter, etc..


Correction.  JPS files are *usually* side-by-side stereo pairs, with the
right image first (i.e. cross-eyed), but they CAN contain anaglyphic,
interleaved, over/under or even monoscopic images!  The APP3 marker
("stereoscopic data descriptor") specified by Vrex (and objected to so
strongly by Mr. Berlin) disambiguates which of these possible formats it
is.  If the APP3 marker is missing, then the reader program is to assume
side-by-side, no image separation, right image first.  It just so
happens that, by design, this default is displayed properly by most any
JPEG decoder.

The beauty of the DepthCharge concept is that it will take the JPS file
in whatever format it is in, and render it in your choice of formats on
your screen, thus accommodating full-screen viewing with shutter
glasses, red/blue specs, or dual-image cross-eyed or wall-eyed
freeviewing from a single image format.

     -Greg W. (gjw@xxxxxxxxxx)



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