Re: JPS format

[P3D jon siragusa <siragusa@xxxxxxxxx>]

Earl Keyser wrote:
>
>        Reply to:   JPS format
>
>Can someone please explain JPS format for me?  I gather it contains stereo
>info within a single image (or is it two pictures files simply stored as
>one?).
>

A JPS file (Stereo JPEG) is a JPEG that contains a stereo pair.  This stereo
pair can be laid out in a few different ways (side-by-side, interleaved,
over-under, anaglyph).  Because there are a number of different stereo pair
layouts (as well as differentiating between whether the left or right field
comes first, etc) a JPS also includes whats called a Stereoscopic Descriptor.

The Descriptor is a short bit of information that is embedded in the header
of a stereo image file.  A stereo image viewer will typically read this
Descriptor and from there will know how to read in the image pair.  The
DepthCharge Viewer which i mentioned in a previous post works in this manner.

For those who are interested, I have written (with the input of key people 
who are working with stereoscopic imaging on computers) a white paper that 
fully describes the Stereoscopic Descriptor and how it pertains to JPS.  
If anyone is interested in this document please send me an email and i'll 
send you a copy (via email attachment).  The document is more a technical
reference for someone wishing to implement stereo image reading or writing 
in their programs than coffee table reading, but i'll send it to whoever
asks.

jon




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