A method of controlling a display apparatus which processes and displays an image signal, the method comprising: receiving an image data; obtaining an image signal and a metadata from the received image data; and acquiring information relating to an area of interest by using the metadata and performing a high dynamic range, HDR, processing on the area of interest by using the acquired information, the method characterized by: acquiring information relating to a color range of a front view corresponding to a main object based on the information relating to the area of interest; acquiring information relating to a color range of a background based on the information relating to the area of interest; acquiring a range in which the color range of the front view and the color range of the background are overlapped with each other as range information of a mixed area of the front view and the background based on the information relating to the area of interest; identifying as to which area from among the front view, the background and the mixed area a pixel corresponding to the area of interest belongs to, and performing at least one from among a tone mapping or a saturation mapping using a different parameter according to the identified area. receiving an image data; obtaining an image signal and a metadata from the received image data; and acquiring information relating to an area of interest by using the metadata and performing a high dynamic range, HDR, processing on the area of interest by using the acquired information, the method characterized by: acquiring information relating to a color range of a front view corresponding to a main object based on the information relating to the area of interest; acquiring information relating to a color range of a background based on the information relating to the area of interest; acquiring a range in which the color range of the front view and the color range of the background are overlapped with each other as range information of a mixed area of the front view and the background based on the information relating to the area of interest; identifying as to which area from among the front view, the background and the mixed area a pixel corresponding to the area of interest belongs to, and performing at least one from among a tone mapping or a saturation mapping using a different parameter according to the identified area. acquiring information relating to a color range of a front view corresponding to a main object based on the information relating to the area of interest; acquiring information relating to a color range of a background based on the information relating to the area of interest; acquiring a range in which the color range of the front view and the color range of the background are overlapped with each other as range information of a mixed area of the front view and the background based on the information relating to the area of interest; identifying as to which area from among the front view, the background and the mixed area a pixel corresponding to the area of interest belongs to, and performing at least one from among a tone mapping or a saturation mapping using a different parameter according to the identified area.