Looking Glass Portrait & StereoPhoto Maker: Calibration via visual.json
The Looking Glass Portrait is a holographic frame that displays light-field images without glasses. StereoPhoto Maker connects to it in a specific, documented way: since v6.12 it can read the display’s calibration values from the visual.json file a Looking Glass unit carries, and use them for its interlaced output.
The calibration step that matters
Every Looking Glass display has its own optical calibration. When you connect the unit to a computer it exposes a visual.json containing those values. SPM reads them so the interlaced image it generates matches your specific frame’s optics instead of a generic guess — the difference between a hologram that snaps into focus and one that almost does.
Building an image for the Portrait
- Start from an aligned stereo pair (or a small set of views) in SPM.
- Load the Portrait’s visual.json calibration when generating the display image.
- Generate the interlaced/multi-view output and transfer it to the frame by its normal route.
Honest scope
SPM is a stereo-pair tool feeding a light-field display; it is not a full light-field renderer, and Looking Glass’s own software covers multi-view synthesis from depth. Where SPM earns its place is upstream: aligned, window-set, correctly calibrated source material. A single good pair, properly prepared, beats a folder of raw shots fed straight to the frame.
The entry holographic frame is the Looking Glass Go; the Portrait discussed here is its larger sibling.
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