All the example files-优快云博客

本文介绍了HEIF文件格式的多种用途，包括存储静态图片及其缩略图、图片集合、图像序列等，并展示了不同类型的HEIF文件实例，如单一图片、图片集合、图像爆发等。

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http://nokiatech.github.io/heif/examples.html

HEIF files can store:

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)

Still images

Each file contains a high quality still image and its thumbnail:

Single image

Image collections

Each file contains multiple still images, just like an album or collection:

Image collection

Image bursts

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:

Image burst

Image burst: Video & HD images

Image sequences

Sequence of images can be stored just like Cinemagraphs or Animated GIFs:

Image sequence

Image Derivations

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:

Derived Grid

Derived Overlay

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:

Alpha Mask