Fecha de publicación: 22/12/2022 Fuente: WIPO (eseential oils OR extracts) An image processing apparatus includes circuitry and memory coupled to the circuitry. In operation, the circuitry: derives a size of a subpicture included in a picture using a size of the picture, a position of the subpicture, and a size of a coding tree block (CTB) included in the picture, when the subpicture is located at a right border or a bottom border of the picture, the position of the subpicture being indicated using the size of the CTB; and extracts a sub-bitstream of the subpicture from a bitstream of the picture.