Annotating AR measurements onto photos requires solving the persistence problem — AR markers disappear when you close the app. Wonder Ruler's approach is elegant: freeze the AR view as a camera frame and overlay measurements as persistent graphics.
Architecture considerations:
- Store measurement coordinates relative to image pixels, not world space
- Render annotations as vector overlays that scale with image zoom
- Export as standard image formats for sharing
The AR measure photo system has been used in thousands of renovation projects.
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