HapTile → FiftyOne (Native Multimodal MCAP)

HapTile, a haptic-informed vision-tactile-language-action dataset, converted to native multimodal MCAP episodes.

A UR5e arm with a Robotiq 2F-85 gripper works through contact-rich tabletop tasks under teleoperation. Each gripper finger carries a vision-based tactile sensor that films a gel pad printed with a marker grid, so the contact shows as the markers moving. Two RGB-D cameras watch the scene, one facing the table and one on the wrist, and the haptic feedback the operator felt through the teleoperation rig is recorded alongside the robot state.

1,699 episodes across 38 tasks, 664,045 frames, 12.36 hours. In 1,592 of them the operator felt haptic feedback at some point, at the levels firm, mild, soft.

Installation

pip install fiftyone

Usage

import fiftyone as fo
import fiftyone.utils.huggingface as fouh

dataset = fouh.load_from_hub(
    "Voxel51/HapTile",
    name="HapTile",
    persistent=True,
)
fo.launch_app(dataset)

The episodes with the firmest contact on the right fingertip:

view = dataset.sort_by("peak_marker_motion_right", reverse=True)
fo.launch_app(dataset, view=view)

What you get

Each episode contains:

• /front-camera and /wrist-camera, the two RGB views, as foxglove.CompressedVideo
• /tactile-left and /tactile-right, the two fingertip gel pads, as foxglove.CompressedVideo
• /front-depth and /wrist-depth, the depth renderings at 640x480, as foxglove.CompressedVideo
• /tactile.plot, the marker motion each fingertip measures, with the release's summary of the two alongside
• /haptic-feedback, the feedback level the operator felt, written at each change
• /end-effector-pose in the UR5e base frame, as foxglove.PoseInFrame, with /end-effector.plot carrying x, y, z and the rotation vector, and /end-effector-velocity.plot its linear and angular speed
• /joints.plot and /joint-velocities.plot, the six arm joints
• /command.plot, the commanded joint targets and gripper
• /gripper.plot, the gripper position
• /instruction, the task text

The colour and tactile streams are 320x240 except in move_mobile_box, whose 47 episodes record them at 640x480.

Task	Episodes	Frames	Minutes	Instruction
insert_peg	50	40,656	45.2	insert the peg in the red hole
move_mobile_box	61	29,702	29.2	move the mobile box to the right side of the workspace
move_disposable_cup	60	26,898	32.4	move the disposable cup to the bottom right side of the workspace
put_apple	63	24,319	27.1	move the apple onto the red plate
turn_cleanser_bottle	30	23,114	25.7	pour liquid from the cleanser bottle into the yellow bowl
wipe_whiteboard	50	22,860	25.5	use the sponge to wipe the whiteboard and remove the marker drawing
put_spray_bottle	50	22,674	25.2	put the transparent spray bottle on top of the drawer
move_plush_toy	70	22,636	27.0	move the plush toy to the bottom left side of the workspace
move_cable	55	22,063	26.5	move the cable to the bottom left side of the workspace
remove_laundry_pod	60	21,006	23.4	remove a laundry pod from the box and place it on the green Tshirt in the laundry basket
stack_glass_cups	30	20,638	23.0	add the glass cup on the table to the stack of glass cups on the left side of the dish rack
move_water_bottle	49	20,165	22.5	move the water bottle to the bottom right side of the workspace
put_orange	47	19,647	21.9	put the orange in the purple bowl
turn_can	30	19,466	21.7	turn the can upright and place it onto the white tray
put_baseball	29	17,698	19.7	put the baseball in the purple bowl
fold_tshirt	30	17,641	19.6	fold the Tshirt from its bottom
stack_disposable_cup	51	17,118	19.1	pick up the top cup from the stack of disposable cups and place it on the table
remove_sugar_bag	61	17,064	19.0	remove one sugar bag and place it on the table
turn_water_bottle	39	16,842	18.8	turn the water bottle upright and place it onto the white tray
put_sponge	31	16,825	18.7	put the sponge in the red plate
move_rubiks_cube	30	15,202	16.9	move the rubik's cube to the bottom right side of the workspace
remove_cloth	30	15,018	16.7	remove the green Tshirt from the laundry basket and place it on the table
move_can	30	14,732	16.4	move the can to the top right side of the workspace
put_spoon	49	14,391	16.0	put the spoon in the glass cup
put_spatula	49	14,360	16.0	put the spatula on top of the pan
put_stack_glass_cups	27	14,161	15.8	put the stack of glass cups onto the red plate
put_banana	42	13,831	15.4	put the banana onto the red plate
put_fork	50	13,823	15.4	put the fork in the right side of the plate
remove_screwdriver	50	13,601	15.1	remove the red screwdriver from the table and place it on the left side of the workspace
press_coffee_machine	50	13,562	15.1	turn on the coffee machine by pressing the button
remove_tissue	47	12,839	14.3	remove a paper tissue from the box and place it on the table
move_spoon	49	12,309	13.7	move the spoon to the left side of the plate
put_lego	60	11,525	12.8	put the black lego piece on the box
stack_bowls	50	11,486	12.8	add the green bowl to the top of the bowl stack
put_golf_ball	50	9,350	10.4	put the golf ball into the blue bowl
remove_sticky_note	30	9,057	10.1	remove the green sticky note and place it on the table
put_strawberry	30	7,960	8.9	put the strawberry onto the red plate
move_toy_car	30	7,806	8.7	move the toy car into the transparent box

Episodes carry the fields task, session, episode_index, recorded, instruction, num_frames, duration, fps, end_effector_path_m, gripper_min, gripper_max, peak_marker_motion_left, peak_marker_motion_right, haptic_feedback and haptic_feedback_frames.

Notes on the conversion

The source ships one zip per task holding a folder per episode, each with a trajectory.h5 that embeds the six camera streams as MPEG-4 Part 2 videos. Every stream is re-encoded to Annex-B H.264 without B-frames, one access unit per frame, frame for frame against the source's own count.

The source stamps every frame with the wall-clock time it was recorded, without a time zone. Episodes are placed on that clock relative to their first frame, so the frame rate varies as the recording did, and the start time is kept in recorded.

The depth streams arrive as 8-bit renderings rather than metric depth and are carried as video like the colour streams.

The release records the haptic channel in three ways. Most episodes carry the feedback level with the summed marker motion of both fingertips and its normalized form, which /tactile.plot carries as sum and normalized. Some carry the larger of the two fingertips instead, carried as max and normalized. The 47 episodes of move_mobile_box carry no haptic channel at all, so they have no /haptic-feedback stream and their haptic_feedback fields are empty.

Where the source's streams disagree in length, the difference is trailing: a final row with an empty timestamp, or a state array or video one frame longer than the rest. Every stream is cut to the shortest, which drops the longer streams' extra trailing frame in 40 episodes. One folder with an empty trajectory is left out.

The source's activated flag is set on every frame of every episode and its 30-channel touch array is zero throughout, so neither is carried.

The pose is published as a position and a rotation vector and is carried as one on /end-effector.plot, alongside the quaternion /end-effector-pose needs. The gripper entry of the source's joint array duplicates gripper_position and is carried once, on /gripper.plot.

Task names are lower-cased. The handful of still frames some episode folders carry beside the trajectory are not reproduced, and neither are the source's per-episode frame-rate reports, whose content the timestamps already hold.

License & attribution

The source release is distributed under CC BY 4.0, and this conversion is distributed under the same license.

@article{alian2026haptile,
  title   = {HapTile: A Haptic-Informed Vision-Tactile-Language-Action
             Dataset for Contact-Rich Imitation Learning},
  author  = {Alian, Amirhosein and Zhao, Yongqiang and Gu, Shiyi and
             Zhang, Xuyang and Chen, Zhuo and Mower, Christopher E. and
             Bou-Ammar, Haitham and Luo, Shan},
  journal = {arXiv preprint arXiv:2606.04825},
  year    = {2026}
}

Changes from the source: conversion to the FiftyOne MCAP flavor, re-encoding of the six camera streams from MPEG-4 Part 2 to H.264, the recording clock rebased to each episode's first frame, every stream cut to the shortest where the source's lengths disagree, the pose carried as a quaternion beside the source's rotation vector, task names lower-cased, the empty trajectory and the constant activated and touch arrays left out, and the robot state, tactile, haptic and instruction streams encoded as message streams.