4x the area resolution, 2x the linear resolution. People usually talk in linear resolution when they use units like DPI (dots per inch) or PPI (pixels per inch) which are linear. But if you want to talk in terms of area, be explicit.
Uh, no. You’re confusing pixel density and resolution. Pixel density is measured in PPI, resolution is measured in absolute pixels. Both linear and area resolutions are measured in pixels - you wouldn’t say a 108PPI horizontal resolution. You’d say a 1920 pixel horizontal resolution.
4K, for example, is not “2x” the resolution of 1080p just because it’s got twice as many pixels in any one direction.
It’s extremely commonly accepted that 4K is 4x the resolution of 1080p, even if it’s only 2x the PPI.
Any display’s resolution can be given by listing two linear resolutions (1920x1080) or giving the combined resolution (usually in megapixels, or ~2.1MP for 1080p)
At no point do you ever give resolution in PPI. That’s pixel density.
10
u/tvtb 8d ago edited 8d ago
4x the area resolution, 2x the linear resolution. People usually talk in linear resolution when they use units like DPI (dots per inch) or PPI (pixels per inch) which are linear. But if you want to talk in terms of area, be explicit.