# Roomza Hotel-Room Interior Taxonomy v1

The Roomza taxonomy targets a labeling regime that the three dominant indoor-scene taxonomies under-serve: the furnished, single-occupancy hotel guestroom. NYUv2-40 and ScanNet-20 were drawn from residential and small-office scans; ARKitScenes-17 restricts itself to room-defining furniture and explicitly excludes wall-mounted, soft, and small-form-factor objects. Hospitality perception requires a finer grain on bedside furniture, bathroom fixtures, and operator-installed hardware (minibar, in-room safe, luggage rack, robe hook, hairdryer mount) while collapsing residential clutter classes (clothes, books, paper, person, box) that do not generalize across rooms cleaned to a standard. The 41 classes below are organized into six semantic groups and crosswalked one-to-one against NYUv2-40, ScanNet-20, and ARKitScenes-17; a `null` crosswalk marks a class that has no equivalent in the reference set and is therefore Roomza-distinctive.

## Group 1 — Sleep & Seating

- **bed** — The primary sleep surface assembly including mattress, box spring, and platform or frame visible above the floor. INCLUDES rollaway and sofa-bed when deployed flat. EXCLUDES headboard, pillows, duvet, and bench-at-foot, which are labeled separately.
- **headboard** — A vertical panel mounted to the wall or attached to the bed frame at the head of the bed, upholstered or rigid. INCLUDES integrated reading-light panels and wall-anchored "faux" headboards painted or paneled directly behind the bed. EXCLUDES decorative wall art above the headboard.
- **bed_runner** — A decorative cloth band laid across the foot third of the made bed. INCLUDES throw blankets folded across the bed. EXCLUDES the duvet, top sheet, and bed skirt.
- **pillow** — Any soft rectangular cushion resting on the bed or on seating furniture. INCLUDES decorative shams and bolster pillows. EXCLUDES seat cushions structurally integral to a chair or sofa.
- **lounge_chair** — A free-standing single-occupant chair intended for reading or relaxation, typically upholstered with arms. INCLUDES club chairs, wingbacks, and tub chairs. EXCLUDES desk chairs (separate class) and ottomans.
- **desk_chair** — A free-standing chair positioned at the work desk, typically with a hard or lightly padded seat and often castors. INCLUDES task chairs and side chairs pulled to a desk. EXCLUDES lounge_chair and dining/banquet chairs.
- **ottoman** — A low upholstered form without a back, used as footrest or auxiliary seating. INCLUDES storage ottomans and pouffes. EXCLUDES benches with structural legs visible (see bench_at_foot).
- **bench_at_foot** — A low long-form seat positioned at the foot of the bed, with visible legs or plinth. INCLUDES luggage-bench combinations. EXCLUDES ottomans (no legs) and standalone luggage_rack.
- **sofa** — A multi-seat upholstered seating unit with back and arms. INCLUDES loveseats and sectional segments in suites. EXCLUDES sofa-beds when deployed flat (label as bed) and single lounge_chairs.

## Group 2 — Surfaces & Storage

- **nightstand** — A short cabinet, table, or wall-mounted shelf positioned immediately adjacent to the bed at sleeping height. INCLUDES floating wall-mounted bedside shelves. EXCLUDES the lamp resting on it and any wall-mounted reading sconce.
- **desk** — A horizontal work surface with at least one supporting leg, pedestal, or wall-cantilever, sized for a laptop or writing. INCLUDES writing tables and consoles repurposed as desks. EXCLUDES TV credenzas and dressers.
- **tv_credenza** — A low horizontal cabinet or console positioned to support or face the television, typically with drawers or doors. INCLUDES media consoles and dressers that double as TV stands when the TV is on top. EXCLUDES wall-mounted TV shelves with no cabinet body (label only the television).
- **dresser** — A multi-drawer chest used for guest clothing storage, free-standing and not supporting a television. INCLUDES highboys and lowboys. EXCLUDES TV credenzas (separate class) and built-in closet drawers.
- **wardrobe** — A free-standing or built-in enclosed cabinet for hanging clothing, with full-height doors. INCLUDES armoires and reach-in closets framed with visible casework. EXCLUDES walk-in closet rooms (treated as a separate room) and open garment racks.
- **luggage_rack** — A free-standing folding or fixed rack at suitcase height with strap or slat surface, intended for an open suitcase. INCLUDES wall-mounted folding luggage shelves. EXCLUDES bench_at_foot (has cushion) and ottomans.
- **shelf_open** — Any open horizontal storage surface without doors, fixed to a cabinet body, wall, or pillar. INCLUDES decorative niches and the open shelves above a minibar or under a desk. EXCLUDES closed cabinets, wardrobe interiors, and floating nightstand shelves.
- **coffee_table** — A low horizontal surface positioned in front of seating, free-standing. INCLUDES side tables and end tables next to a sofa. EXCLUDES nightstands (bedside) and desks (work height).

## Group 3 — Bathroom

- **toilet** — The plumbed seated fixture for waste, including bowl, tank or concealed cistern, and seat. INCLUDES wall-hung toilets. EXCLUDES bidets (see bidet) and urinals.
- **bidet** — A separate plumbed wash fixture positioned adjacent to the toilet, with its own bowl and faucet. INCLUDES standalone bidets and bidet-toilet combinations only when the bidet element is geometrically distinct. EXCLUDES toilet-integrated washlet seats.
- **sink_vanity** — The sink basin together with the surrounding countertop and the cabinet beneath it, treated as one fixture. INCLUDES double-basin vanities and wall-hung vanity consoles. EXCLUDES the mirror above it and the faucet hardware on it.
- **bathtub** — A plumbed soaking basin large enough for a reclined adult, free-standing or alcove-set. INCLUDES jetted tubs and tub-shower combinations (when the tub geometry is present). EXCLUDES shower-only enclosures.
- **shower_enclosure** — A walled-off standing shower volume with glass, tile, or curtain walls, no tub basin. INCLUDES walk-in showers and pre-fabricated shower stalls. EXCLUDES tub-shower combinations (see bathtub) and the shower curtain itself.
- **shower_curtain** — A fabric or vinyl curtain hung from a rod to contain shower spray. INCLUDES liner-and-decorative-curtain pairs as a single instance. EXCLUDES fixed glass shower doors (part of shower_enclosure).
- **towel_rack** — A wall-mounted bar, ring, or heated rail for hanging towels. INCLUDES heated towel rails and free-standing towel valets. EXCLUDES the towels hanging on them (label as towel) and robe hooks.
- **toilet_paper_holder** — A wall-mounted or free-standing fixture for one or more rolls of toilet paper. INCLUDES recessed niches with a roll spindle. EXCLUDES backup-roll baskets on the floor.
- **hairdryer_mount** — A wall-mounted bracket or holster housing a hairdryer, with the hairdryer present or docked. INCLUDES the dryer when seated in its bracket. EXCLUDES loose hairdryers on the counter (label as otherprop equivalent and ignore for v1).

## Group 4 — Window & Opening

- **window** — A glazed opening in an exterior or interior wall, including frame and visible glass. INCLUDES floor-to-ceiling glazing and sliding balcony doors when primarily glass. EXCLUDES the curtains, blinds, and sheers covering them.
- **curtain** — A fabric drape hung from a rod or track in front of a window, full-length. INCLUDES blackout drapes and decorative side panels. EXCLUDES sheer panels (see sheer) and roller blinds (see blinds).
- **sheer** — A translucent fabric panel hung between the window and any opaque curtain. INCLUDES day-curtains and voile panels. EXCLUDES opaque curtains and roller shades.
- **blinds** — A horizontally or vertically slatted, or roller-style, window covering mounted inside or above the window frame. INCLUDES roller shades, Roman shades, and venetian blinds. EXCLUDES fabric drapes (see curtain).
- **door** — A hinged or sliding panel filling an interior or exterior doorway, including its visible frame. INCLUDES connecting-room doors and bathroom doors. EXCLUDES sliding glass balcony doors when they read primarily as windows (label as window).

## Group 5 — Hospitality Fixtures

- **minibar** — A small refrigerated cabinet, typically under a counter or inside a credenza, holding beverages and snacks for purchase. INCLUDES the visible refrigerator door and any adjacent fixed beverage shelf. EXCLUDES full-size in-suite refrigerators (label as refrigerator).
- **in_room_safe** — A small wall-anchored or shelf-anchored locking metal box for valuables, with a keypad or dial. INCLUDES safes mounted inside wardrobes or under desks when visible. EXCLUDES jewelry boxes and decorative lock-boxes without keypad/dial.
- **coffee_station** — The countertop assembly of a single-serve brewer, kettle, or pod machine together with its tray, mugs, and supplies. INCLUDES the welcome tray as one instance when items are grouped. EXCLUDES the minibar fridge (separate class) and loose mugs elsewhere.
- **ironing_board** — A free-standing or wall-mounted padded board for garment pressing, with or without its iron present. INCLUDES wall-mounted fold-down boards in their stowed cabinet. EXCLUDES the iron itself if separable on a shelf.
- **television** — A wall-mounted or credenza-mounted flat-panel display. INCLUDES bathroom mirror-TVs when the display area is visible. EXCLUDES the credenza beneath it (see tv_credenza).
- **thermostat_panel** — A wall-mounted climate or room-control panel, typically near the entry or bedside. INCLUDES integrated room-control touchscreens and PTAC face panels. EXCLUDES light switches and door card-readers.
- **refrigerator** — A full-height or full-size refrigerator, distinct from a minibar. INCLUDES suite kitchenette refrigerators. EXCLUDES under-counter minibar units (see minibar).

## Group 6 — Wall-mounted, Lighting & Soft Goods

- **picture** — A framed or unframed two-dimensional artwork, photograph, or print mounted on a wall. INCLUDES diptychs and triptychs as separate instances per panel. EXCLUDES mirrors and televisions.
- **mirror** — A reflective glass panel mounted to a wall or to the back of a door, framed or frameless. INCLUDES bathroom vanity mirrors and full-length closet-door mirrors. EXCLUDES decorative reflective metal art.
- **nightstand_lamp** — A table lamp resting on a nightstand, or a wall-mounted reading sconce serving the same purpose at sleeping height. INCLUDES swing-arm bedside sconces. EXCLUDES floor lamps and desk lamps.
- **floor_lamp** — A free-standing lamp with a base on the floor and the light source at standing or seated height. INCLUDES arc lamps and tripod lamps. EXCLUDES table lamps on furniture surfaces.
- **ceiling_light** — Any luminaire mounted to the ceiling, including flush, semi-flush, pendant, and chandelier. INCLUDES recessed downlights when visible as discrete fixtures. EXCLUDES cove lighting strips hidden behind millwork.
- **robe_hook** — A small wall-mounted single or double hook for hanging a robe or towel, typically in the bathroom or behind a door. INCLUDES decorative hook-and-knob fixtures. EXCLUDES full coat-racks and wardrobe interior hooks.
- **towel** — A folded or hanging cloth towel of any size present in the bathroom or on the bed. INCLUDES bath, hand, face, and decorative towels. EXCLUDES bathrobes (label as otherprop equivalent and ignore for v1).
- **rug** — A floor-laid textile that is smaller than the room footprint, with visible edges over the underlying floor. INCLUDES area rugs and bedside runners. EXCLUDES wall-to-wall carpet (treated as floor).

## Crosswalk

| Roomza class | NYUv2-40 | ScanNet-20 | ARKitScenes-17 | Notes |
|---|---|---|---|---|
| bed | bed | bed | bed | Direct match across all three. |
| headboard | null | null | null | Roomza-distinctive; sub-component of bed-zone, structurally a wall fixture. |
| bed_runner | null | null | null | Roomza-distinctive soft good; absent from residential taxonomies that ignore styled bedding. |
| pillow | pillow | null | null | NYU-only; ScanNet folds into otherfurniture. |
| lounge_chair | chair | chair | chair | Sub-typed; reference taxonomies do not separate lounge from task. |
| desk_chair | chair | chair | chair | Sub-typed; see above. |
| ottoman | otherfurniture | otherfurniture | stool | Closest ARKit equivalent is stool. |
| bench_at_foot | otherfurniture | otherfurniture | null | Roomza-distinctive; hotel-specific furniture position. |
| sofa | sofa | sofa | sofa | Direct match across all three. |
| nightstand | night stand | otherfurniture | null | NYU40 only; named "night stand" with a space. |
| desk | desk | desk | table | ScanNet/NYU have desk; ARKit collapses to table. |
| tv_credenza | otherfurniture | otherfurniture | null | Roomza-distinctive; ARKit labels the TV alone, not the credenza. |
| dresser | dresser | otherfurniture | cabinet | NYU has dresser; ARKit collapses to cabinet. |
| wardrobe | otherfurniture | otherfurniture | cabinet | Reference taxonomies do not separate wardrobes from generic cabinetry. |
| luggage_rack | null | null | null | Roomza-distinctive; hospitality-only fixture. |
| shelf_open | shelves | otherfurniture | shelf | NYU "shelves"; ARKit "shelf". |
| coffee_table | table | table | table | Sub-typed; reference taxonomies do not separate coffee from dining/work. |
| toilet | toilet | toilet | toilet | Direct match across all three. |
| bidet | null | null | null | Roomza-distinctive; not present in any reference taxonomy. |
| sink_vanity | sink | sink | sink | Reference taxonomies label sink alone; Roomza merges with surrounding vanity. |
| bathtub | bathtub | bathtub | bathtub | Direct match across all three. |
| shower_enclosure | null | null | null | Roomza-distinctive; reference taxonomies stop at shower_curtain. |
| shower_curtain | shower curtain | shower curtain | null | NYU/ScanNet match; ARKit furniture-only set excludes it. |
| towel_rack | null | null | null | Roomza-distinctive; bathroom hardware below reference grain. |
| toilet_paper_holder | null | null | null | Roomza-distinctive; bathroom hardware below reference grain. |
| hairdryer_mount | null | null | null | Roomza-distinctive; hospitality-only fixture. |
| window | window | window | null | NYU/ScanNet match; ARKit furniture-only set excludes architectural openings. |
| curtain | curtain | curtain | null | NYU/ScanNet match. |
| sheer | curtain | curtain | null | Sub-typed; reference taxonomies fold sheers into curtain. |
| blinds | blinds | null | null | NYU only; ScanNet collapses to otherfurniture. |
| door | door | door | null | NYU/ScanNet match. |
| minibar | refrigerator | refrigerator | refrigerator | Roomza sub-types; reference taxonomies use generic refrigerator. |
| in_room_safe | null | null | null | Roomza-distinctive; hospitality-only fixture. |
| coffee_station | otherprop | otherfurniture | null | Reference taxonomies have no in-room beverage assembly class. |
| ironing_board | otherprop | otherfurniture | null | Roomza-distinctive; hospitality-installed appliance. |
| television | television | otherfurniture | tv_monitor | All three reference the display; naming varies. |
| thermostat_panel | otherprop | null | null | Roomza-distinctive; wall-mounted control hardware. |
| refrigerator | refrigerator | refrigerator | refrigerator | Direct match across all three (full-size only). |
| picture | picture | picture | null | NYU/ScanNet match. |
| mirror | mirror | null | null | NYU only; ScanNet folds into otherfurniture. |
| nightstand_lamp | lamp | null | null | NYU "lamp" covers all luminaires; Roomza sub-types by position. |
| floor_lamp | lamp | null | null | Sub-typed; see above. |
| ceiling_light | lamp | null | null | Sub-typed; reference taxonomies group all luminaires under lamp. |
| robe_hook | null | null | null | Roomza-distinctive; bathroom hardware below reference grain. |
| towel | towel | null | null | NYU only. |
| rug | floor mat | null | null | NYU "floor mat" is the closest cognate. |

## Distinctive to hospitality

The following Roomza classes have no equivalent in NYUv2-40, ScanNet-20, or ARKitScenes-17, and constitute the dataset's core differentiation for furnished-room perception:

- headboard
- bed_runner
- bench_at_foot
- luggage_rack
- bidet
- shower_enclosure
- towel_rack
- toilet_paper_holder
- hairdryer_mount
- in_room_safe
- thermostat_panel
- robe_hook
- tv_credenza

These thirteen classes are concentrated in three zones the reference taxonomies systematically under-label: the bed assembly (headboard, bed_runner, bench_at_foot), the bathroom hardware layer (bidet, shower_enclosure, towel_rack, toilet_paper_holder, hairdryer_mount, robe_hook), and operator-installed in-room infrastructure (luggage_rack, in_room_safe, thermostat_panel, tv_credenza). A perception model trained on Roomza labels can resolve these objects at production grain; a model trained on NYU40, ScanNet-20, or ARKitScenes-17 cannot.