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Stereo Panography STEREO PANOGRAPHY How I make 360 degree stereoscopic photos Thomas K Sharpless Philadelphia, PA [email protected] WHY SPHERICAL PHOTOGRAPHY? ● Omnidirectional view of a place and time ● Very high resolution possible ● Immersive experience possible WHAT IS A SPHERICAL PHOTO? ● A 360 x 180 degree image ● Processed and stored in a flat format such as equirectangular or cube map. ● Viewed piecewise on a screen using panorama player software with interactive pan and zoom. ● When viewed in a virtual reality headset, you feel that you are inside the picture. SPHERICAL IMAGE FORMATS TOP: 360x180 DEGREE EQUIRECTANGULAR MAP BOTTOM:SIX 90x90 DEGREE CUBE FACES VIEW SPHERICAL PHOTOS ON THE WEB The bathroom panorama, on 360Cities.net Are You Asleep In There? -- Ed Wilcox Same room, different artist, on Roundme.com Now And At The Hour Of Our Death -- Ashley Carrega HOW TO MAKE A SPHERICAL PHOTO ● Use a fish-eye or ultra-wide lens ● Rotate the camera around lens pupil while taking enough photos to cover the sphere ● Use stitching software to combine the photos into a seamless spherical image A PRO PANORAMIC CAMERA SONY A7r FULL FRAME MIRRORLESS CAMERA SIGMA 15 MM 160 DEGREE FISH-EYE LENS A COMPACT PANORAMIC CAMERA SONY ALPHA, SAMYANG 8mm/2.8 160 DEG. FISH-EYE PANORAMIC TRIPOD HEAD NODAL NINJA NN6 WITH MULTI-STOP ROTATOR PANORAMA BUILDING SOFTWARE ESSENTIAL ● PTGui pro ($$) or Hugin (free) ● Adobe Photoshop ($$$) or GIMP (free) VERY USEFUL ● Adobe Lightroom ($$) ● Pano2VR pro ($$) ● Image Magick (free) ESSENTIAL FOR 3D ● sView stereo panorama player (free) ● PT3D stereo stitching helper ($) OMNIDIRECTIONAL STEREO Combines two 19th century innovations: panoramic photos + stereoscopic photos Depends on 21st century digital technology Best viewed on a computer-driven stereopticon, that is, a virtual reality headset OMNISTEREO THEORY An omnistereo photo is a stereo pair of slit-scan panoramas. These are not quite spheres, and not quite regular photos; but close enough to present a very good 3D viewing experience. To learn all about it, read Paul Bourke's papers http://paulbourke.net/stereographics/ STEREO PANORAMA METHODS I. SINGLE CAMERA, SINGLE SPIN Easy and reliable Needs many photos with large overlap Only for static subjects II. TWIN CAMERAS, STEREO STITCHING Shoot and stitch much like 2D panorama Suitable for action subjects High resolution possible SINGLE CAMERA, SINGLE SPIN METHOD ● 180 degree fish-eye camera ● Panorama head with 24 or more click stops ● Lens pupil offset forward of axis by IPD ● Take photos all around the horizon, quickly ● Align in stitcher, then stitch twice... – Left eye with mask offset to right – Right eye with mask offset to left ● Retouch and adjust convergence SINGLE CAMERA STEREO RIG SINGLE LENS STEREO STITCH 30 PHOTOS 12 DEGREES APART MASKED FOR LEFT EYE SINGLE LENS STEREO MASKS LEFT AND RIGHT IMAGES TAKEN 60 DEGREES APART MASKS SELECT CORRESPONDING AREAS PRINCIPLE OF SINGLE LENS METHOD TWIN CAMERA STEREO STITCHING WITH PTGui AND PT3D ● Matched cameras, aligned and synchronized ● Shoot RAW in normal panorama pattern ● Process RAW images for color match ● Align all photos in PTGui ● Generate stitch project with PT3D ● Warp-to-fit and stitch in PTGui ● Retouch, adjust color and convergence SINGLE-ROW TWIN CAMERA RIG SONY NEX-5n, SAMYANG 7.5MM/3.5 NODAL NINJA e-MOUNT CONVERSION SINGLE ROW STEREO STITCH LEFT EYE PHOTOS 0-7 (lower) RIGHT EYE PHOTOS 8-15 (upper) MULTI-ROW TWIN CAMERA RIG SONY NEX-5n, SONY 16MM/2.8 NODAL NINJA NN3, HOMEBREW STEREO BAR MULTI-ROW STEREO STITCH 4 ROWS OF 8 STEREO PAIRS THIS IS THE 32 RIGHT EYE IMAGES WAYS TO VIEW STEREO PANORAMAS ● Computer => 3D monitor or TV ● tethered VR headset (Rift, Vive, Odyssey) ● Stand-alone VR headset (Gear VR, Go) ● Smart phone + phone stereoscope ENABLING TECHNOLOGIES HTML5, WebGL : high performance graphics in web browsers. Embedded panorama players (krpano, others) : spherical images in any web page. WebVR : virtual reality display in browsers. Virtual reality headset (GearVR,Go, Rift, Vive) : immersive stereo viewing with multiple apps, including webVR enabled browsers. PUBLISHING STEREO PANORAMAS ● 360Cities.net, Roundme.com, others Easy upload and edit Support phone stereoscopes and webVR ● Gala360app.com VR headset app serving virtual tours + website supporting phone stereoscopes and webVR Subscription model ● Own website with krpano, pano2VR, etc. Full control, lots of work .
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