Still Images, their thumbnails and related metadata such as EXIF or XMP information
Image Collections, their thumbnails and related metadata such as EXIF or XMP information
Image sequences such as cinemagraphs or image bursts and related metadata
Unprocessed image and processed images in the same file with proper labelling and referencing
Image derivation information such as rotation, overlay and grid view along with the images, so that different image derivations can make use of the same image data set
Auxiliary image data such as depth map and alpha channel along with the images
Audio tracks and cover images along with still images and image sequences
HEIF files also inherit many properties of ISOBMFF such as edit lists, media alternatives, media data groupings. Moreover, an MP4 file can be “branded” so that it can also contain images and image sequences as well as video and audio (i.e. dual branding)
Each file contains a high quality still image and its thumbnail:
Each file contains multiple still images, just like an album or collection:
Each file contains a short video, thumbnails of each frame in the video and high quality version
of the “selected best shots” from an image burst.
The files are represented in two different modes: 1. Burst images, 2. Video and HD quality images:
Sequence of images can be stored just like Cinemagraphs or Animated GIFs:
Each file contains derived image information which is composed of other images present in the file.
Such a design drastically increases storage and representation efficiency.
The following HEIF files contain Grid and Overlay derived Image examples and they are marked as the “cover images” of the files:
Auxiliary Image Storage
It is also possible to store helper images such as an alpha mask or depth map along with the original image.
The following example contains a derived image composed of two overlays and one of the images contain a gradient alpha mask to provide gradual transparency: