<stereo-img>

<stereo-img> is a web component to display stereographic pictures on web pages, with VR support. It supports various stereo picture formats: VR Photos (VR180, Google Camera panorama, Photosphere), left-right, and anaglyph.

See the demo for an example.

How to use

Load the module:

<script type="module" src="https://stereo-img.steren.fr/stereo-img.js"></script>

Then use the <stereo-img> custom element anywhere in your page or app, reference a stereo picture in the src attribute:

<stereo-img src="picture.vr.jpg"></stereo-img>

Alternatively, you can serve the module from your own server, install it via npm:

npm install stereo-img

Attributes

• src: (Required) source of the stereo picture (absolute or relative)
• type: (Optional) type of stereo picture:
  • If unset, type is inferred from heuristics
  • vr: VR Photo - VR180, Google Camera panorama, Cardboard Camera, Photosphere images (Where right eye image and angle of view info are embedded in the image metadata)
  • left-right: left eye on the left, right eye on the right, Exif angle of view is used if present.
  • right-left: left eye on the right, right eye on the left, Exif angle of view is used if present.
  • top-bottom: left eye on the top, right eye on the bottom, Exif angle of view is used if present.
  • bottom-top: left eye on the bottom, right eye on the top, Exif angle of view is used if present.
  • anaglyph: Anaglyph 3D - currently only supporting red / green
• angle: (Optional) hint at angle of view for left-right or top-bottom types
  • If unset, Exif angle of view is used if present.
  • 180: Half sphere (VR180)
  • 360: Full sphere
• projection: (Optional) hint at projection (most VR pictures use equirectangular projection)
  • If unset, projection is inferred from heuristics.
  • fisheye: Fisheye projection
• wiggle: (Optional) When viewing in 2D, alternate between left and right images to help the user see the 3D effect
  • enabled: wiggle is enabled
  • disabled: wiggle is disabled

Compatibility

Supported cameras

This component has been manually tested to load pictures taken with the following cameras:

| Status | Camera | Picture type | Attributes required | Field of view | Orientation | | ------ | ----------------------------------- | ------------------- | ------------------------------------- | ------------- | ----------- | | ✔️ | Lenovo Mirage Camera | unprocessed (VR180) | (none) | ✓ | ✓ | ✔️ | Canon RF5.2mm F2.8 L Duel Fisheye | unprocessed | (none) | X | X | ✔️ | Canon RF5.2mm F2.8 L Duel Fisheye | processed with EOS VR Utility | (none) | X | X | ✔️ | CALF VR180 | left-right | (none) | X | X | ✔️ | CALF VR180 | "vr180" | angle="180" | X | X | ✔️ | Kandao QooCam EGO 3D Camera | left-right | (none) | X | X | ❌ | Vision Pro | | | |

Viewers and headsets

This component has been manually tested on the following hardware, OS and browsers:

| Hardware | OS | Browser | Status | | ----------- | ------- | --------------- | ------ | | HTC Vive | Windows | Chrome | ✔️ | HTC Vive | Windows | Firefox | ✔️⚠️ With WebXR polyfill | HTC Vive | Windows | Firefox Reality | ✔️ | Cardboard | Android | Chrome | ✔️ | Cardboard | Android | Firefox | ❌ | Cardboard | iOS | | ❌ #18 | Quest 1 | | Default | ✔️ | Quest 2 | | Default | ✔️️ | Vision Pro | | Safari | ❌ #34

Installing using npm

Instead of a CDN, you can install the module locally using npm:

npm install stereo-img

Then, use a JavaScript builder or import-maps to load the module and its dependencies:

If using import-maps:

<!-- Shim for importmap -->
<script async src="https://unpkg.com/[email protected]/dist/es-module-shims.js"></script>
<script type="importmap">
  {
    "imports": {
      "stereo-img": "./node_modules/stereo-img/stereo-img.js",
      "exifr": "./node_modules/exifr/dist/full.esm.js",
      "three": "./node_modules/three/build/three.module.js",
      "three/": "./node_modules/three/"
    }
  }
</script>

Then load the stereo-img module:

<script type="module">import "stereo-img";</script>

Contributing

See development instructions and contribution guidelines