UK The difference in one paragraph
The difference between LiDAR and a camera is what each one measures. LiDAR fires laser pulses and times their return, so it measures the distance to every point it hits and builds an accurate 3D point cloud, day or night. A camera records the light from a scene as a detailed colour image, but it has no direct measure of distance and has to work out depth from two views or with AI.
Cameras are better at recognising what something is, such as a sign, a person or a type of vehicle. LiDAR is better at knowing exactly where it is and how big it is. That is why the two are often fused: the camera classifies, and LiDAR confirms position and distance.
LiDAR vs camera compared
The table compares the two sensors on the points that usually decide a design. Figures vary widely between models, so treat them as typical rather than fixed.
| Feature | LiDAR | Camera |
|---|---|---|
| How it senses | Times laser pulses reflected from surfaces | Records light from the scene on an image sensor |
| Depth | Measured directly, typically to a few centimetres | Inferred by stereo matching or AI; error grows with distance |
| Detail and colour | Sparse points, no colour | Dense pixels, colour, text and texture |
| Darkness | Works, because it brings its own light | Needs ambient light, IR lighting or a thermal camera |
| Glare and low sun | Little affected | Can be blinded or lose contrast |
| Rain, fog and dust | Range and point density drop | Visibility drops, much as for the human eye |
| Output | Point cloud | Images and video |
| Cost | Higher, though falling | Low |
| Processing | Point cloud filtering and clustering | AI models for detection and depth |
How each sensor gets depth
Depth is the biggest difference between the two. Our LiDAR FAQ explains how a LiDAR measures it directly. A camera has three ways to estimate it:
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Stereo vision. Two cameras a fixed distance apart find the same point in both images and calculate its distance from the shift between them.
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Monocular AI. A neural network estimates depth from a single image, using learned cues such as size and perspective. Useful, but less precise.
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Structure from motion. A moving camera compares frames over time to build 3D shape, as used in photogrammetry.
When to choose LiDAR, cameras or both
Most decisions come down to what the machine must know, in what light and weather, and how much a missed detection would cost. Start from the task, then pick the sensors that cover it.
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Choose LiDAR. For precise distances, volumes and 3D shape, or for work at night.
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Choose cameras. For classifying objects, reading signs and colour-based tasks at low cost.
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Choose both. For autonomous machines where safety depends on detection and position.
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Add radar. For long range and bad weather, since radar sees through rain, fog and dust better than either.
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Plan the compute. Fusing several streams needs an AI computer with enough inputs and processing.
Practical trade-offs
Beyond what each sensor can see, a few practical points often settle the choice on a real machine:
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Cost per sensor. Industrial cameras cost far less than most LiDARs, so a design may use six cameras for the price of one LiDAR.
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Moving parts. Spinning LiDARs have a rotating head; solid-state LiDARs and cameras have none, which helps under heavy vibration.
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Cleaning. Both need a clear window. Mud, dust and water droplets degrade either sensor, so plan wipers, air knives or easy access.
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Calibration. Fused systems need the LiDAR and cameras calibrated to each other, and rechecked if a sensor is knocked or replaced.
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Data volume. Several high-resolution cameras can produce more data than a LiDAR, so both affect the computer you choose.
Why many systems use both
In cars, the debate is well known. Tesla relies on cameras alone, an approach it calls Tesla Vision, and trains neural networks to estimate depth. Waymo and most robotaxi developers use LiDAR, cameras and radar together. In industry the choice is usually less contested: on construction plant, farm machinery and mobile robots, safety cases tend to favour measured depth, so LiDAR and cameras are combined.
Combining them is called sensor fusion. The point cloud tells the system where an object is, the camera tells it what the object is, and the fused result is more reliable than either alone, particularly when one sensor is degraded by weather or light.
Computing for LiDAR and camera systems
Fusing a LiDAR with several cameras means handling large, synchronised data streams with low latency. Cameras often connect over GMSL, which carries high-resolution video over long, rugged cables; our guide to GMSL technology explains why. LiDARs usually connect over Ethernet, often powered by PoE.
The construction case study and autonomous tractor case study show both in use on rugged Jetson computers.
Quick answers on LiDAR vs camera
LiDAR vs camera: common questions
Is LiDAR better than a camera?
For depth, yes; for recognition, no. LiDAR measures distance more accurately, especially in the dark. Cameras identify objects, colours and text far better and cost less.
Does Tesla use LiDAR?
Not in its production cars. Tesla uses a camera-only approach called Tesla Vision. It has used LiDAR on test vehicles to check its camera-based depth.
Does Waymo use LiDAR?
Yes. Waymo vehicles combine several LiDARs with cameras and radar for redundancy.
Can a camera measure distance?
Yes, indirectly. A stereo camera calculates distance from two views, and AI can estimate depth from one image. Accuracy falls with distance.
Does LiDAR work in rain and fog?
Yes, with reduced range. Droplets scatter the laser, so range and point density drop. Radar is the usual partner for bad weather.
We supply edge AI computers that combine LiDAR, camera and radar inputs, with the drivers, synchronisation and software stack integrated as standard. Tell us the sensors and the machine, and we will recommend the system to fuse them.