Stereo Glass Cutting and Forming Data

It is first-person video of a person working glass, recorded from their own point of view with two calibrated cameras and with hand pose and sensor streams alongside. The tasks are the rows the site’s catalog lists for glass. Stereo describes the capture, and MCAP describes the container. They are separate choices.

The site does not state that stereo is already running on these rows. The catalog lists a head-mounted phone or a multiview rig as the capture setup, and a stereo pair is a capture choice agreed in the skill spec and confirmed on a Spec Pilot. The data is human capture by paid, consented contributors, not robot or teleoperation data. Firsthand is not affiliated with Foxglove or the MCAP maintainers.

Five, across two environments. In Heavy Industry & Fabrication, whose listed examples include metal fabrication, woodworking, glass manufacturing, a concrete plant and a welding workshop, "Glass manufacturing" is described as handling molten or sheet glass and cutting, forming and finishing pieces with tongs, cutters and grinders. It is rated Hard and listed as Available on request.

In Glass & Mosaic Studio, "Glassblowing" is described as gathering molten glass on the pipe, blowing and shaping it with tools and transferring it to anneal, and "Stained glass assembly" as cutting glass pieces to pattern, fitting lead came or copper foil and soldering the joints. Both are rated Hard. "Glass etching" is described as masking the glass, applying etching cream or using a rotary tool and rinsing to reveal the design, and "Mosaic tiling" as cutting tiles, spreading adhesive, setting the pieces in the pattern and grouting the surface. Both are rated Medium. All four are listed as Available on request.

The site says nothing further about what that status means in volume, hours or delivered stereo footage, so this page claims none, and what applies to a given order is confirmed when you request the quote. This page names only the tools and steps that appear in the five rows. The first table below reproduces them as the catalog states them.

The egocentric glass manufacturing page covers the one heavy industry row as egocentric capture, and refers to the MCAP hub for the stereo rig. The glass and mosaic page covers the four studio rows as egocentric craft video. The stereo window and glass cleaning page covers the cleaning row, which uses applicators and squeegees on glass rather than cutting or forming it.

This page is the stereo and MCAP treatment of the glass cutting and forming rows together. The site does not list an off-the-shelf glass dataset, so this work is custom collection. The comparison table below sets the pages side by side.

Glass work is about where the hands, the piece and the tool sit relative to one another: where a cutter meets a sheet, how tongs hold a piece, how a grinder meets an edge. A stereo pair recovers depth from the calibrated frame pair rather than from a standalone depth sensor, so the glass, the tool and the hands share a frame.

The site gives no depth accuracy figure and no label for a finished cut, a formed piece or a finished edge, so whether those are resolvable in depth is Not stated. The site states elsewhere that wet and reflective surfaces degrade active-stereo depth. How transparent or reflective glass behaves is Not stated, and a glass spec should expect the same care and check it on a Spec Pilot. Capture at your own facility is listed as not offered.

The site describes two stereo setups and does not say which one a glass order uses. The hard-environments stack is a global-shutter 4K/60 head camera with a 120° lens, two 1080p/60 wrist cameras, a depth sensor at 848×480 and 30 fps, and 200 Hz 6-DoF IMUs. The off-the-shelf stereo head rig, dataset 06, is dual fisheye cameras at 1080p per eye, a 62 mm baseline, per-unit calibration, a 9-axis IMU and hand-tracking output.

Which rig, resolution and streams a glass order uses is Not stated on the site, and the third table below sets what is stated beside what is not. Intrinsics and extrinsics are re-solved at the start and end of every session, and streams are hardware-triggered onto one clock with a 2.0 ms cross-stream ceiling. The catalog states that a multiview rig adds synchronized third-person angles when the spec asks for them, and wrist cameras give a closer view of the hands.

MCAP is an open source container file format for multimodal log data, supporting multiple channels of timestamped pre-serialized data. It is serialization-agnostic, so messages can be Protobuf, DDS (CDR), ROS, JSON and more. Its design is row-oriented and append-only, it stores schemas alongside the data, and it offers an optional index plus optional LZ4 or Zstandard chunk compression.

Reader and writer libraries exist for C++, Go, Python, Rust, Swift and TypeScript, and the mcap CLI can inspect, merge and split files. The foxglove/mcap repository is MIT-licensed; that is the MCAP project’s licence, not the licence of a Firsthand delivery. The MCAP hub page and the glossary entry cover the format in full.

Firsthand offers MCAP delivery, and dataset 06 is stated as shipping as MCAP. For glass work the site states hand pose, a stereo-derived depth stream with confidence maps, IMU, contact events, action segments and per-frame instance masks elsewhere. What it does not state is which of those are channels in an MCAP file, how they are named, what encoding they use or at what rate.

No topic name, message schema or rate is stated on this page, and none should be assumed. Name the streams that matter in the skill spec and confirm them on a Spec Pilot batch. The fourth table below sets each stream beside what the site states about it.

Hands are the first risk. Pieces are small and are often hidden by the fingers that hold them, and a tool can hide the edge being worked. The visibility flag on each joint is the answer the site gives, contact events mark when a hand meets the item, masks are recorded per frame, and a spec can ask for wrist views so a grip the head camera loses is still recorded.

Surfaces are the second. Glass is transparent or reflective, and the site states that wet and reflective surfaces degrade active-stereo depth and that depth confidence maps mask low-confidence regions. Behaviour on glass itself is Not stated. Heat is the third: the site notes that no thermal stream is listed, which matters for rows that work with molten glass, and force and tactile readings are not among the listed streams either.

Calibration is the fourth, because stereo depth is only as good as the rectification behind it: calibration is measured at the start and end of every session under a 0.28 px RMS gate. An episode is also rejected when the manipulated object is out of frame for more than 15 percent of it or an undocumented bystander appears, and a reject log ships with every batch.

Nothing beyond the rows. Safety certifications, protective equipment, injury handling, temperatures and glass types are Not stated for these rows, and this page makes no such claim. What a contributor may wear, do or show is agreed in the spec.

For every delivered episode the site states that faces, plates and screens are blurred irreversibly, and that footage that cannot be de-identified is discarded. Whether finished pieces or original designs are blurred or protected beyond the licence is Not stated.

The site lists no off-the-shelf glass dataset, so glass cutting and forming is custom collection. The only stereo head rig the site states as shipping as MCAP is dataset 06, and this page does not claim off-the-shelf stereo coverage of glass work. Custom collection covers the rest: custom collection at scale through a network of thousands of capture providers, for a consistent, recurring data flow to labs.

Where coverage is deep, the median time from signed spec to first validated batch is a median of 48 hours; where it is thin, turnaround runs three to four weeks. The site does not say which speed applies to a stereo glass order, and every row here is Available on request, so recruitment comes first and the timeline is quoted against your spec. Collections are billed per validated hour.

Describe the steps and their order, the glass, tongs, cutters and grinders and their start state, what counts as a finished cut, form or edge, and the variation your pipeline is missing. Then name the streams you want in the file, the topic naming and message encoding your reader expects, whether calibration ships inside the file or beside it, and whether MCAP is the only delivery or sits beside RLDS, LeRobot or WebDataset.

Most programs begin with a Spec Pilot, a small first batch that proves the spec and accept criteria on real footage before you scale. The fifth table below shows what each spec element decides.