Device for extracting depth information

A device for extracting depth information, the device comprising:

• a light output unit configured to output infrared (IR) light;
• a light adjustment unit configured to adjust the angle of the light output from the light output unit such that the light scans a first region including a first portion of an object and then adjusts the angle of the light such that the light scans a second region, which is a portion of the first region and includes a predetermined partial region of the first portion of the object;
• a light input unit into which the light output from the light output unit and reflected from the object is input;
• and
• a control unit configured to extract depth information of the second region using a flight time of the light that is output from the light output unit, scans, is reflected from the second region, and is input into the light input,
• wherein the first region is an entire region including the object, and the second region is extracted from the first region and is a partial region including a predetermined region of the object, and
• wherein the light adjustment unit is set to scan the second region for the same amount of time as the amount of time taken to scan the first region.

A method for extracting depth information of a device for extracting depth information, the method comprising:

• scanning a first region including an object with infrared (IR) light output from a light output unit;
• receiving a light that scans the first region and is reflected from the first region;
• scanning a second region, which is a portion of the first region, with IR light output from the light output unit;
• receiving a light that scans the second region and is reflected from the second region;
• and
• extracting depth information of the second region using a flight time of the light that is output from the light output unit, scans, is reflected from the second region, and is input into the light input unit,
• wherein the first region is an entire region including a first portion of the object, and the second region is extracted from the first region and is a partial region that is a predetermined partial region of the first portion of the object,
• wherein the light adjustment unit is set to scan the second region for the same amount of time as the amount of time taken to scan the first region,
• wherein the light adjustment unit includes a microelectromechanical system (MEMS) actuator configured to adjust the angle of light, and
• wherein an operating cycle of the MEMS actuator for scanning the second region is set to be the same as an operating cycle of the MEMS actuator for scanning the first region.