Washing machine and control method thereof

A washing machine comprising:

• a cabinet with an opening at an upper portion thereof;
• an outer tub disposed inside the cabinet;
• an inner tub disposed inside the outer tub;
• a motor configured to rotate the inner tub;
• a camera configured to capture an image of an inside of the inner tub;
• and
• a controller configured to control the motor to perform spinning cycle and set a maximum rotational speed of the inner tub during the spinning cycle,
• wherein the controller is configured to:
• in response to the spinning cycle being started, control the motor to increase a rotational speed of the inner tub,
• in response to the rotational speed of the inner tub reaching a first rotational speed, obtain information of an arrangement of laundry inside of the inner tub based on comparison of the image of the inside of the inner tub captured by the camera with a pre-stored reference image,
• in response to determining a first arrangement of laundry from the information of the arrangement of laundry based on the image of the inside of the inner tub captured by the camera being similar with the pre-stored reference image, set the maximum rotational speed as a first maximum rotational speed, and
• in response to determining a second arrangement of laundry from the information of the arrangement of laundry based on the image of the inside of the inner tub captured by the camera being not similar with the pre-stored reference image, set the maximum rotational speed as a second maximum rotational speed, which is different from the first maximum rotational speed.