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3 votes

human visual: relation of Distance and DPI

According to a review by Legge & Bigelow the arc or degrees of visual angle ($\alpha$) is, $$ \alpha = 57.3 \times S/D, $$ where S is height of object and D is distance to object. [1] $S/D$ is ...
joojaa's user avatar
  • 8,437
2 votes

Pixel density / color channel depth ratio for dithered gradients

There has been quite some research into this using Barten contrast sensitivity function. It is the current formula behind the Dolby Perceptual Quantizer as featured in SMPTE 2084 and HDR10. This, ...
troy_s's user avatar
  • 318

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