9 votes

Camera selection for long range stereo vision system (up to 100 meters)

I still think this is off-topic, but it seems I need more space than a comment to show (answer?) why that is so. You are starting from some performance specifications and are looking to get to a set ...
Chuck's user avatar
  • 16k
8 votes
Accepted

Why do robots need rangefinders while animals don't?

Animals and robots both need to understand something about the 3D structure of the world in order to thrive. Because it's so important, animals have evolved a huge number of strategies to estimate ...
Peter Corke's user avatar
  • 1,702
4 votes

Why do robots need rangefinders while animals don't?

Vision is actually one kind of rangefinder, although passive. Earlier camera use parallax to find the distance and focus. Nowadays, active rangefinders are developed such as ultrasonic sensors, lidar ...
tony.h's user avatar
  • 61
3 votes

Camera selection for long range stereo vision system (up to 100 meters)

I'll try to explain this in terms of software. Firstly, it is just next to impossible to have 100 metres (practically, 3 metres is like the best depth accuracy) and we need to be sure that the cameras ...
Prasad Raghavendra's user avatar
2 votes
Accepted

Typical laser scanner noise values

I think 0.3m noise is a bit exaggerated for a scanning laser rangefinder. As you saw with the Hokuyo (which is one of the cheapest LIDARs you can get) they say that it is 0.03m range "error" (they do ...
Gouda's user avatar
  • 902
2 votes

Typical laser scanner noise values

Am I exaggerating with these values? No your're not but you need to filter the measurements. Also, you can double check datasheet of any laser sensor for the specifications. I've written a code for ...
CroCo's user avatar
  • 2,453
2 votes

Lidar problems in a multi-robot setup

I wouldn't recommend using sensors with different laser frequencies either, because that likely means using an entirely different product, with different accuracy and other properties. don't tilt, ...
Bending Unit 22's user avatar
2 votes

What wavelengths are most commonly used in laser-scanners and LIDAR systems?

Both 1550nm and 900nm ranges are used in different lidars. Velodyne and majority others use 905nm lasers because these diodes are really cheap. 1550nm are used when there is a need for very long ...
tony.h's user avatar
  • 61
2 votes

What wavelengths are most commonly used in laser-scanners and LIDAR systems?

You are correct. Most Velodyne LIDARs (very commonly used on autonomous vehicles), use 905 nm diode lasers, and so do many Hokuyo laser scanners and SICK LIDARs. A new company, Ouster, uses 850 nm ...
HighVoltage's user avatar
  • 1,096
1 vote

Why do robots need rangefinders while animals don't?

Short answer: They don't need. Cameras can be used as range finders, and an easy example is the Xbox Kinect. Computer vision is an area that is being studied a lot. You can find a lot on authonomous ...
BlueDi's user avatar
  • 19
1 vote

Inexpensive lidar/radar rangefinder good up to 100m?

Check this, starting from the last part: I think they are using the same technology as the several of their sensors: ( the one you mentioned) In the 100 dollar price range I think you will not find ...
AL-ROBOT's user avatar
  • 319
1 vote
Accepted

How to access UART or serial sensors?

So according to the datasheet from the link provided, the Data interface is indeed UART (LVTTL 3.3V). The datasheet also says it has 2 Modes of operation: Single measurement, continuous ranging 1Hz to ...
sa_leinad's user avatar
  • 207
1 vote

Hector SLAM, Matching algorithm

The core part of the HectorSLAM is in the file hector_slam/hector_mapping/include/hector_slam_lib/matcher/ScanMatcher.h and ...
ywiyogo's user avatar
  • 141

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