An image processing device, comprising: at least one processor configured to: decode image data to produce decoded image data; acquire dynamic range characteristic information when a video usability information syntax or a sequence parameter set syntax having a flag indicating presence/absence of the dynamic range characteristic information associated with the image data indicates the presence of the dynamic range characteristic information, wherein the presence of the dynamic range characteristic information is indicated when the flag is one and the absence of the dynamic range characteristic information is indicated when the flag is zero, the dynamic range characteristic information including: maximum image white level information (max_image_white_level); maximum image white level code value information (max_white_level_code_value); reference screen luminance information (ref_screen_lw); and white level code value information (white_level_code_value), the maximum image white level information indicating a maximum white level setting of luminance of the image data as a percentage relative to a reference white level setting, the maximum image white level code value information indicating a luminance code value for the maximum white level setting, the reference screen luminance information indicating the reference white level setting, the white level code value information indicating a luminance code value for the reference white level setting, the reference white level setting to be used in a process of developing an image; and adjust a dynamic range of the decoded image data based upon the dynamic range characteristic information. decode image data to produce decoded image data; acquire dynamic range characteristic information when a video usability information syntax or a sequence parameter set syntax having a flag indicating presence/absence of the dynamic range characteristic information associated with the image data indicates the presence of the dynamic range characteristic information, wherein the presence of the dynamic range characteristic information is indicated when the flag is one and the absence of the dynamic range characteristic information is indicated when the flag is zero, the dynamic range characteristic information including: maximum image white level information (max_image_white_level); maximum image white level code value information (max_white_level_code_value); reference screen luminance information (ref_screen_lw); and white level code value information (white_level_code_value), the maximum image white level information indicating a maximum white level setting of luminance of the image data as a percentage relative to a reference white level setting, the maximum image white level code value information indicating a luminance code value for the maximum white level setting, the reference screen luminance information indicating the reference white level setting, the white level code value information indicating a luminance code value for the reference white level setting, the reference white level setting to be used in a process of developing an image; and adjust a dynamic range of the decoded image data based upon the dynamic range characteristic information. maximum image white level information (max_image_white_level); maximum image white level code value information (max_white_level_code_value); reference screen luminance information (ref_screen_lw); and white level code value information (white_level_code_value), the maximum image white level information indicating a maximum white level setting of luminance of the image data as a percentage relative to a reference white level setting, the maximum image white level code value information indicating a luminance code value for the maximum white level setting, the reference screen luminance information indicating the reference white level setting, the white level code value information indicating a luminance code value for the reference white level setting, the reference white level setting to be used in a process of developing an image; and adjust a dynamic range of the decoded image data based upon the dynamic range characteristic information.