Samsung Files Patent to Turn Messy Robot Vacuum Maps Into Tidy 3D Floor Plans
Your robot vacuum already knows your floor plan, but the map it draws can look like it was sketched during an earthquake. Samsung's patent application cleans it up by checking where the robot actually drove.
What Samsung's map cleanup patent actually does
Ever opened your robot vacuum's app and wondered why a perfectly straight hallway looks like a wobbly coastline? The robot maps your home with sensors, and those readings come out noisy: stray short lines, jagged edges, and walls that bend where they shouldn't.
Samsung's patent application describes a tidy-up step. A phone, a server, or the vacuum itself takes the rough map, deletes the stray scribbles, and straightens the wobbly lines. The twist is that it also checks the route the vacuum actually drove. If the robot rolled through a spot, that spot is clearly part of your home, so the cleanup keeps it inside the lines.
Once the flat map is clean, the system raises walls to build a 3D model of your home. You could even drag a slider to decide how much smoothing you want.
obtain a 2-dimensional (2D) map of an indoor space generated based on sensing data, and traveling data obtained by at least one external device, simplify the obtained 2D map, based on the traveling data, and generate a 3-dimensional (3D) map, based on the simplified 2D map.
Translation: The system takes messy vacuum maps and travel data to build clean 3D floor plans.
How the robot's route decides what stays
The system starts with a rough map. A robot vacuum (or another home robot) scans a room with sensors such as lidar (a laser distance sensor) or a camera, then builds a grid map: a checkerboard of 4 cm squares, each marked as holding an obstacle or not. It also records traveling data, meaning its route, speed and history.
A phone, server or the robot itself then turns that grid into clean lines:
- Convert the obstacles into a black-and-white image and thin every line to the same width.
- Find straight-line candidates and join them into connected outlines (polylines, which are chains of straight segments).
- Delete noise, meaning lines that are very short or change direction too often.
- Straighten bumps, join gaps, and use the robot's route to keep the areas it drove through as indoor space.
Room outlines are then corrected: areas outside the new boundary are dropped, and areas inside it that were missed get added. Walls are raised from the cleaned outline to make the 3D map, and a wall's shape, height and thickness can follow obstacle information from the sensors.
The filing also describes a slider for how much to simplify, separate settings per room (a cluttered storage room can stay detailed), a prompt when the system is unsure about an area, an editing screen, and a re-run on a schedule such as one month or after furniture moves.
Why your robot vacuum's map could look better
If you own a robot vacuum, the map in its app is often the least polished part. A cleaner floor plan is easier to read, and Samsung's description says you could tap a home appliance in the 3D view to control it, or see where the vacuum already cleaned, with the route and cleaning time shown on the map.
The filing is a continuation of earlier applications, so it extends an existing family of filings. It also reaches beyond vacuums: serving robots and guide robots are named as other machines that could feed the same kind of map. Nothing in the text says when, or whether, this reaches a product.
Samsung's 55th filing we've tracked in our home robot watchlist since May touches on work like heating mop water early and finding a moved charger.
Simplifying a map means throwing information away, and that is the cost here. A narrow gap, a diagonal wall or a small piece of furniture can get squared off or erased if the cleanup is too eager.
Samsung's design admits this. It lets you turn the smoothing up or down, keeps more detail in cluttered rooms, and asks you before touching spots it can't judge. It also treats the robot's driven route as proof of real floor, which means places the robot never reached get less protection.
The trade reads as worth it. A map you look at every day should resemble your home, and a few lost details are cheap when you can adjust the dial. The price is extra questions on screen, and a vacuum app that nags you could wear thin fast.
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The drawings
28 drawing sheets from US 2026/0329286 A1 · click any drawing to enlarge
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