4K resolution

4K resolution talks about a horizontal display resolution of about 4,000 pixels.^[1] Digital television and digital cinematography commonly use several different 4K resolutions. In television and consumer media, 3840x2160 (4K UHD) is a common 4K standard. The movie projection industry uses 4096x2160 (DCI 4K). The 4K used for iMac's display is 4096 x 2304 px. 4K is generally considered to be the upgrade to 1080p (1920x1080). The advantages of 4K are that the display has four times more pixels than 1080p which allows the picture to be clearer.

4K Resolution Media

Comparison of common broadcast resolutions
Comparison of common display resolutions
Comparison of DCI and UHD resolutions
Samsung UN105S9 105-inch (2,700 mm) ultra-high-definition 4K television
2013年資訊月，Sony攤位展示的Handycam消費型4K解析度攝影機FDR-AX1。
In full size, this image shows the difference between four subsampling schemes. The color images appear similar. The lower row shows the resolution of the color information.

References

↑ Goulekas, Karen (2001). Visual Effects in a Digital World. Morgan Kaufmann. p. 587. ISBN 9780080520711. 4K resolution: A general term referring to any digital image containing an X resolution of approximately 4096 pixels.

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[1] Goulekas, Karen (2001). Visual Effects in a Digital World. Morgan Kaufmann. p. 587. ISBN 9780080520711. 4K resolution: A general term referring to any digital image containing an X resolution of approximately 4096 pixels.

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