Robot cleaner

A vacuum cleaner comprising:

• a main body including at least one motor to suction air through a suction hole provided with a roller brush and to allow the main body to move autonomously for cleaning a floor surface within an area to be cleaned;
• a laser to irradiate light towards a region in front of the main body;
• a camera configured to capture at least one image in front of the main body;
• an image processor to process the at least one image captured by the camera;
• a synchronization generator to generate a plurality of synchronization signals;
• and
• a controller to control the motor, the laser, the camera, the image processor, and the synchronization generator, wherein
• the synchronization generator generates first, second and third synchronization signals during a prescribed time period,
• the camera captures images during the prescribed time period,
• the laser is turned on when the first and third synchronization signals are generated and is turned off when the second synchronization signal is generated, and
• the image processor processes first and second images captured by the camera when the laser is turned on based on the first and third synchronization signals and discards a third image captured by the camera when the laser is turned off based on the second synchronization signal.