Term: Image size

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Term: Image size

Definition:

Sometimes referred to as resolution, the image size is the basic measurement of how much visual information is represented in the image. The size of the image is measured in pixels for the horizontal dimension (width) and lines for the vertical dimension (height). The horizontal dimension is listed first and the two values are separated by an "x".

Image size can have a direct impact on file size because larger images hold more data which can increase overall file size.

While the display and rendering of the video will depend on other factors as well, this value represents information that cannot be recouped once lost. If image size is scaled up dramatically for display, may introduce visual artifacts and muddyness.

Typical values for video images and film include:

• NTSC broadcast � 330 x 485
• NTSC laserdisc � 425 x 485
• ITU-R BT.601 (525/60) � 720 x 485
• Computer screen � 1280 x 1024
• HD: 1280 x 720
• Full HD: 1920 x 1080
• 2K: 2560 x 1440
• 4K (UHD): 3840 x 2160
• 8K: 7680 x 4320

Category:

General

Resource:

FADGI Significant Properties for Digital Video
https://www.digitizationguidelines.gov/guidelines/sigpropvideo.html

See also:

resolution