Lantern: one walk with a phone becomes an offline indoor map, built by Gemma 4

说明与用途

Lantern 将一次手机走访转换为离线室内地图，提供逐步照片导航，无需互联网或 GPS。

问题

Visitors in large buildings without indoor maps cannot find facilities when network is blocked.

结果

Lantern creates a usable offline indoor map in under two minutes from a single phone walk, enabling navigation in crowded venues without internet or GPS.

工作流

• 1. Walk through the building once, filming and narrating place names.
• 2. Gemma 4 processes the video, extracting frames and aligning narration to create a map JSON.
• 3. A reviewer checks and edits the map on a review page, then prints QR signs.
• 4. Visitors scan a QR sign and follow step‑by‑step photo directions, with audio read‑out, in offline mode.

证据

Lantern turns one walk into a map that works offline

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Someone walks through the building once, filming on their phone and saying what they see

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Gemma 4, running on a laptop, turns that video into a map

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Visitors scan a sign and walk. One instruction at a time, each with a photo of the next landmark

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Lantern makes a venue navigable in an afternoon, for visitors who are elderly, new to smartphones, or don't read English well

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