Sigachi Industries Interview Questions and Answers

Loop closer in VSLAM and Scan matching is a technique used to optimize the trajectory of a robot by closing loops in the map.

• Loop closer is responsible for correcting accumulated errors in the estimated trajectory of a robot in VSLAM.

• It helps in aligning the current scan data with the previously mapped environment to improve localization accuracy.

• Loop closer can be implemented using techniques like loop closure detection, loop constraint optimization, and loop error minimizat...read more

Scan matching in ICP algorithm involves aligning two sets of scan data to find the transformation that minimizes the difference between them.

• Scan matching is a key step in Iterative Closest Point (ICP) algorithm used for registering point clouds.

• It involves finding the transformation (translation and rotation) that aligns two sets of scan data.

• The goal is to minimize the difference between the two sets of points by iteratively refining the transformation.

• ICP algorithm is comm...read more

The navigation stack is a collection of software components that work together to enable a robot to navigate autonomously in its environment.

• The navigation stack typically includes components such as localization, mapping, path planning, and obstacle avoidance.

• Localization is the process of determining the robot's position and orientation in the environment.

• Mapping involves creating a map of the environment using sensor data.

• Path planning calculates a safe and efficient path ...read more

VSLAM stack stands for Visual Simultaneous Localization and Mapping stack, used in robotics for navigation and mapping.

• VSLAM stack combines visual data from cameras with sensor data for localization and mapping in real-time

• It typically includes components like feature extraction, feature matching, camera calibration, and pose estimation

• Popular VSLAM algorithms include ORB-SLAM, LSD-SLAM, and PTAM

There are three main types of IoT devices: consumer, commercial, and industrial.

• Consumer IoT devices: Smart home devices like thermostats, lights, and security cameras.

• Commercial IoT devices: Smart meters, asset tracking systems, and connected vending machines.

• Industrial IoT devices: Sensors and actuators used in manufacturing, agriculture, and healthcare.