Nollog said:Vertical.Issac said:the number is the number of horizontal lines the image is made of... and since 16:9 format is most used nowadays: 1080p = a resolution of 1920 pixels times 1080 pixels.
Get it?
2k and 4k are horizontal though. Which will be less misleading. (1920 is the constant for 1080p video content, not 1080)
Horizontal.
Quoting wikipedia: "1080p is the shorthand identification for a set of HDTV video modes that are characterised by 1,080 lines of vertical resolution (1,080 horizontal scan lines)"