When comparing corporate showroom interactive systems, start with the information the exhibit needs.
Does the application only need to detect someone entering an area? Does it need precise selection coordinates across a projection surface? Or must it recognize a visitor’s body pose?
These requirements lead to different sensing choices.
LiDAR is worth evaluating for spatial interaction across walls and floors. Simple infrared sensors suit defined triggers, while infrared touch frames serve bounded touch surfaces. Cameras are useful when the experience needs images, silhouettes, or body-pose information.
The best choice depends on the intended input, installation geometry, software, and operating conditions—not a universal ranking of technologies.
First, Clarify What “Infrared” Means
“LiDAR, infrared, and cameras” are common purchasing categories, but they overlap technically. Many LiDAR devices use infrared laser light, and some depth cameras also use infrared illumination.
In this comparison:
- LiDAR refers primarily to scanning 2D distance sensors used for interactive surfaces and zones.
- Infrared refers to simple motion or beam sensors and infrared touch frames.
- Cameras include conventional RGB cameras and depth cameras.
This distinction matters. An infrared motion detector and an infrared touch frame provide very different information, even though both are described as “IR.”
How the Three Approaches Work
LiDAR: Distance Measurements Become Interaction Coordinates
A scanning LiDAR measures distances in different directions. In a 2D system, those measurements describe objects intersecting a scanning plane.
Software can convert the measurements into positions, selections, or tracked targets. SICK’s technical documentation describes this planar scanning principle and optical time-of-flight measurement.
The application typically receives information about where something is detected. It does not automatically receive a complete description of a person or gesture.
Infrared: From Simple Triggers to Touch Coordinates
A passive infrared motion sensor, or PIR sensor, detects changes in received infrared radiation. It can suit a motion-triggered introduction, but a basic PIR detector does not provide precise selection coordinates or dependable continuous detection of a stationary visitor.
An active infrared beam sensor detects an interrupted or reflected beam. It can trigger an action at a defined location.
An infrared touch frame creates a grid of beams around a display. Interrupting the grid allows the controller to determine touch coordinates. This is a different capability from simple motion detection.
Cameras: Images or Depth Data Support Visual Interpretation
An RGB camera captures image frames. Software can analyze them for movement, silhouettes, objects, or body landmarks.
A depth camera supplies distance information across an image. Depending on the model, it may use stereo vision, structured light, or time-of-flight sensing.
For example, Orbbec’s Femto Bolt depth camera uses modulated near-infrared light. Consequently, camera systems should not all be treated as dependent on visible room lighting in the same way.
LiDAR vs Infrared vs Cameras: Practical Comparison
The table below provides a selection framework, not a performance benchmark.
| Factor | Scanning 2D LiDAR | Simple infrared sensors | Infrared touch frames | RGB/depth cameras |
|---|---|---|---|---|
| Typical input | Positions within a scan plane | Motion, beam interruption, or proximity event | Coordinates within a framed surface | Images, depth, or algorithm-derived features |
| Suitable tasks | Projection selection and spatial interaction | Starting content at a defined trigger | Fixed display interaction | Silhouettes, pose, and visual recognition |
| Lighting considerations | Active sensing; sunlight and materials still matter | Depends on sensing method | Check ambient infrared tolerance | RGB needs usable exposure; depth behavior varies |
| Multiple inputs | Depends on separation and processing | Usually limited information per sensor | Model-dependent multi-touch | Depends on visibility and tracking software |
| Installation constraints | Scan geometry and sightlines | Trigger placement | Frame dimensions and unobstructed beams | Viewpoint, distance, and scene coverage |
| Data characteristics | Range data; software may output coordinates | Events or basic measurements | Touch coordinates | Image or depth data, potentially reduced to features |
| Typical integration effort | Moderate, depending on middleware | Low for a basic trigger | Often modest with a compatible controller | Modest with a proven package to substantial for custom recognition |
When LiDAR Is a Strong Candidate
LiDAR becomes particularly relevant when a showroom needs where-based interaction across a physical area.
Consider it for a projected surface where visitors select content at multiple locations, or an open floor where positions influence the presentation. It can also be useful when a physical touch frame does not suit the dimensions or architecture.
Another advantage is that a LiDAR-based installation can operate without conventional color-video capture. That may simplify the data design when the application only needs coordinates.
However, the limits should be explicit:
- Objects outside a 2D scan plane are not directly measured by that plane.
- Visitors and furniture can block sightlines.
- Multiple detections are not automatically equivalent to identified people.
- Fine targets require testing at the intended distance.
- Gesture interpretation requires suitable software.
Choose LiDAR because its measurements match the task. Do not assume that it replaces a body-tracking camera in an experience built around full-body poses.
When Infrared Is the More Direct Choice
Simple Motion or Beam Triggers
If the requirement is “start a short introduction when someone enters this defined area,” a suitable infrared trigger may provide all the necessary input.
A more elaborate spatial tracking system may add integration work without improving that action.
Specify whether the installation must detect motion, a crossing event, or continued occupancy. These are different requirements, and a basic PIR sensor does not satisfy all three equally.
Fixed Interactive Displays
An infrared touch frame is worth considering for a bounded screen or flat surface where the frame can be installed appropriately.
It should not be dismissed as a single-user technology. Commercial infrared displays can support multiple touches; for example, Elo lists an infrared option with 20-touch support for one of its display models. That is a model-specific specification, not a guarantee for every IR frame.
Check frame dimensions, controller compatibility, edge behavior, and the actual application’s handling of simultaneous inputs.
When Cameras Provide Information LiDAR Cannot
Camera-based interaction is a strong candidate when the visitor’s appearance or body configuration is central to the experience.
Examples include an avatar following body movements, a projected silhouette, or software identifying a demonstrated object.
The main selection question is whether the system needs RGB images, depth data, or both.
Do not assume every camera fails in a dark showroom. Active depth cameras may operate without strong visible illumination. Conversely, sunlight or other infrared sources can affect some depth systems. Orbbec documents these limitations for structured-light approaches, while offering other products with different operating characteristics.
Camera installation also needs to account for overlapping bodies, viewing angle, clothing, and processing performance. A working pose-tracking demonstration with one person does not establish performance with a crowded group.
Compare Accuracy and Response Using the Same Task
“High accuracy” is not a meaningful comparison unless each proposal performs the same action under the same conditions.
For a selection interface, measure whether visitors activate the intended target across the entire surface. For body tracking, examine the stability of the landmarks the application actually uses.
Similarly, compare action-to-visible-response delay, rather than sensor frame rate alone. Filtering, recognition, communication, rendering, and display processing all contribute.
A fair comparison should use:
- The same target sizes or required movements.
- The intended installation distance.
- Representative lighting and surface materials.
- The expected number of participants.
- The actual content application.
Ask suppliers to report missed actions and false activations alongside successful demonstrations.
Privacy Depends on the Data Workflow
LiDAR and basic infrared systems can support interaction without collecting color images. That is useful when the experience only requires locations or trigger events.
However, position histories and tracking identifiers can still be recorded. A camera application may process frames locally without storing them, but image acquisition still occurs.
For any proposed system, ask:
- What data is captured?
- What reaches the application?
- Is anything stored or transmitted?
- Can unnecessary streams or logging be disabled?
Avoid treating “camera-free” as equivalent to “no data collection,” or assuming that every camera installation records video.
Compare Maintenance Costs Across the Whole System
The lowest sensor price does not necessarily produce the lowest operating cost.
A simple trigger can be inexpensive to maintain because it has a narrow function. A touch frame needs attention to its beam paths and controller. LiDAR installations need stable alignment, clean optical surfaces, and saved configurations. Camera systems need stable mounting, suitable exposure, and a maintained software stack.
All approaches also depend on the content computer and display equipment.
Compare supplier quotations for equivalent scope: configuration, software licensing, replacement procedures, recalibration, support, and updates. Prebuilt camera software may require less development than custom LiDAR processing, just as established LiDAR middleware may simplify a projection project considerably.
Recommended Starting Points by Showroom Space
| Showroom requirement | Technology to evaluate first | Reason |
|---|---|---|
| Motion-triggered welcome message | Suitable infrared motion or beam sensor | Only a basic event is required |
| Fixed product information screen | Infrared touch frame or integrated touch display | Bounded coordinate input |
| Broad interactive projection wall | 2D LiDAR | Spatial selection without a surrounding touch frame |
| Position-responsive floor | LiDAR; compare overhead depth sensing where appropriate | Geometry and occlusion determine the better fit |
| Full-body gesture installation | Camera/depth camera with proven tracking software | Requires information beyond a single scan plane |
| Small, precise touch interface | Touch technology designed for the target size | Fine input should be demonstrated directly |
| Mixed-purpose experience center | Separate sensing methods by function | Each task can use the input it needs |
A hybrid showroom can be sensible. A basic entry trigger, a LiDAR projection, and a camera-based avatar can coexist without forcing one technology to serve every function.
Evaluating CPJROBOT M1 and F1
For projects where LiDAR matches the requirements, CPJROBOT is a manufacturer offering M1 and F1 PoE interactive LiDAR sensors. Its product overview lists 360° scanning for M1 and 270° scanning for F1. CPJROBOT product information
Evaluate M1 when its full scanning angle suits the mounting arrangement and active area. CPJROBOT M1
Evaluate F1 when its 270° field of view covers the required region from the proposed location. Account for the unscanned sector when planning placement. CPJROBOT F1
Both merit consideration for position-based interactive projects, but scan angle alone should not decide the purchase. Request current specifications and test coverage, small-target detection, and simultaneous inputs with the intended software.
Free Testing Software from the Manufacturer
CPJROBOT provides free testing software for its PoE interactive LiDAR sensors. LiDAR Touch is provided free with those sensors, and the download center includes test content and SDK resources for M1 and F1. Confirm hardware and software version compatibility. CPJROBOT software information, Download Center
Use these resources to establish whether the sensor provides the input your exhibit needs. Custom content, gesture logic, and integration services may require separate development.
For a LiDAR shortlist, send CPJROBOT that requirement together with your layout and participant expectations. Request an M1 or F1 demonstration using the available free testing software, then compare the result against the same task offered to other suppliers.
Explore CPJROBOT LiDAR sensors · Access free testing resources
