Description of image composition with hevc still image file format

A method of generating an image file based on one or more images or sub-images, the method comprises:

• obtaining the one or more images or sub-images;
• generating an information item that includes descriptive metadata for each obtained image or sub-image, wherein the information item is associated with initialization data of the obtained image or sub-image;
• generating a composite item, wherein the composite item is associated with a dependency list to one or more of the information items and with transformation parameters to apply to dependent information items;
• and
• generating the image file, wherein the image file contains the one or more images or sub-images, the information items, and the composite item.