Method for controlling laundry treating apparatus

A method for controlling a laundry treating apparatus including a cabinet having an opening and defining a space to receive laundry therein, a door configured to open and close the opening, a drum disposed in the cabinet and configured to rotate the laundry, a driver coupled to the drum and configured to rotate the drum, a camera disposed in the opening or on the door and configured to film an interior of the drum, and a controller configured to control the driver and the camera and calculate a weight or a volume of the laundry, the method comprising:

• performing a first rotating operation of rotating the drum to agitate the laundry;
• performing a first filming operation of calculating the volume of the laundry through a first image obtained by filming the interior of the drum;
• based on the volume calculated in the first filming operation, performing an inspection operation of determining whether the volume of the laundry calculated in the first filming operation is between a reference value and a predetermined value;
• based on determining that the volume of the laundry calculated in the first filming operation is between the reference value and the predetermined value, (i) performing a second rotating operation of rotating the drum to agitate the laundry, (ii) performing a second filming operation of re-calculating the volume of the laundry through a second image obtained by filming the interior of the drum, and (iii) performing a finalizing operation of analyzing at least one of the first image and the second image to determine the volume of the laundry;
• and
• based on determining that the volume of the laundry calculated in the first filming operation is less than the reference value or greater than the predetermined value, omitting the second rotating operation and the second filming operation, and performing the finalizing operation of analyzing the first image to determine the volume of the laundry.