Overview: Photos and images

Digital images have pixel, format and metadata properties that influence their appearance, size and presentation.

A photograph's visible appearance depends on more than its dimensions. Encoding can discard detail, transparency can change compositing, and orientation information can change how stored pixels are displayed.

The fundamentals explain the image signal, the format pages describe its packaging and compression, and presentation topics connect it to the screen. These distinctions matter for photographs and for the posters, backgrounds and previews displayed around an Emby library.

• Digital image fundamentals
  Image fundamentals describe the pixel grid, transparency, orientation and compression behind a digital picture.

• Image formats
  Image formats define how pictures, supporting metadata and sometimes multiple images are stored and interpreted.

• Image presentation
  Image presentation turns stored picture data into a sized, color-interpreted and sometimes animated or HDR display result.