Robot and method for calculating distance to object

A robot comprising:

• a two-dimensional (2D) camera;
• a one-dimensional (1D) distance sensor;
• a driving module configured to move the robot;
• memory storing one or more computer programs;
• and
• one or more processors communicatively coupled to the memory;
• wherein the one or more computer programs include computer-executable instructions that, when executed by the one or more processors individually or collectively, cause the robot to:
• obtain a 2D image by controlling the 2D camera;
• calculate relative depths of actual regions indicated by pixels in the 2D image, based on the obtained 2D image;
• obtain a reference distance to a point to which a laser output from the 1D distance sensor is irradiated;
• determine a distance from the robot to an object in the 2D image based on the obtained reference distance and a relative depth of a reference point corresponding to the point to which the laser is irradiated among the pixels in the 2D image;
• and
• control the driving module to travel based on the determined distance to the object.