Robotics Stack Exchange
Robotics Stack Exchange

Questions tagged [localization]

Localization is the problem of estimating a robot's pose relative to a map of its environment.

Localization is the problem of estimating a robot's pose relative to a map of its environment. There are a number of types of robot localization. The easiest is position tracking, where the initial pose of the robot is known and the localization system must correct for small errors generated by the robot's odometry. A more difficult problem is the global localization problem, where the robot is not told its initial position and must determine it. Localization is a sub-problem of the more complex field of Simultaneous Localization and Mapping (SLAM), where the localization system must build the map and locate the robot in the map at the same time.

One of the key sub-problems is the kidnapped robot problem. After the robot has localized, the robot is transported to a different location without being informed of the transition. This problem tests the localization system's ability to recover from complete failure.

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How To Determine Heading Without Compass

Lets say I drop a robot into a featureless environment and any magnetic field based sensors (magnetometer/compass) are not allowed. What methods are there of determining where north is? Tracking the sun/stars is an option but not reliable enough…
user65
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laser scanner distance

I'm looking at laser scanners and I see a huge range of detection distances. The furthest I've see are 30m if you exclude the very expensive ones that claim up to 150m. My question is what is the reason for the huge difference in range/price. I…
JDD
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How can my robot find its position in any given map without GPS, including when the initial point is not given?

Consider this map The Contest arena shown in figure 1 consists of two sub arenas, both the sides are identical to each other and their scientists and safe zone locations are similar. Each sub arena has 3 different colored rooms and a fourth shared…
Muhammad Siraj
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Determining a robot's distance from a certain point when the robot's position is constantly changing

I was wondering how I could determine a robot's distance from a fixed point when the robot itself is constantly changing positions. I can keep encoders on the wheels and can also get data from a gyroscope and an accelerometer.
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Locating Omni-Directional Robot

I have an omni-directional robot, such as a X-Drive or mecanum Drive that I need to track the position of. I can put encoders on the wheels, but that is all I can do in terms of the sensors. I have no external beacons that I can link to. The issue…
Roboter
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Can triangulation by measuring angles to 3 beacons to find location work over a large outdoor area

To determine an outdoor location I think that I need to measure the angles between at least 3 beacons and take into account the order I sweep the beacons. Is this a workable solution to get positional accuracy of about 30cm in a house block sized…
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Heading and Yaw Rate Measurements

I am working in the field of automated vehicles mainly in the domain of passenger and commercial vehicles. I have been studying whatever I can get regarding the measurement the state (relative position, relative velocity, relative heading and…
Zero
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Image based 3d position estimation with one camera

There is too many 2d position estimation with one camera. Is there any 3d position estimation application or technique with one camera? If there is no application or technique why?
acs
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Lawn Mower Robot Boundary Wire Current

Robot Lawn Mowers have those Boundary Wires where a weak current runs through. This creates a magnetic field around it. The Robot then detects the magnetic field and knows it has reached the end of the lawn. I want to use the same system to navigate…
Linus
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hand_eye_calibration, surface normal by stereo vision

I'm a graduate student at mechanical engineering. I took computer vision(stereo vision) last semester but I'm still fairly new to this area. I wonder if I may ask 3 questions related to computer vision? We have a 6 DOF robot arm, and we want to…
Ali
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Calculate the Vehicle corner points given localization

I am trying to calculate the corner points of the vehicle given the details below: Localization data from rear axle of the vehicle Length and Width of the vehicle Heading of the vehicle ENU Could anybody help me calculate the 4 corner points of…
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What is the difference between Markov localization and hidden Markov localization?

I just started studying localization for robotics. I started with Markov localization. There was a cool lecture on Udacity. I also came across another localization called hidden Markov localization, but couldn't find many blogs on it. Can anyone…
siva_uchiha
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Localization on a robot grid

I have a skid steer drive train with an encoder on each side of the robot along with a gyro to measure the angle of the robot. The width of the robot is 26 inches. Using the encoders I would like to set up an x and y coordinate grid to know the pose…
user16593
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Localization in box using rangefinders

Let's say I have a robot, located in a box. The robot can move in the x and y and rotate. The robot has 4 rangefinders, mounted 90 degrees apart, that measure the distance to the walls of the box (I think it would be possible with just 3 but let's…
jdrd
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Position estimation from photo fingerprinting

i want to make 3d position and position change estimation from photos taken from flying robot. I need suggestions for fast photo matching.
acs
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