Jnd: Difference between revisions
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(Created page with "<!-- '''Just-Noticeable Difference''' (sometimes JND), and the closely related '''Difference Threshold''' refers to the amount of difference for us to recognize two things are different. Often it matters less what you can see in lab conditions, with highly engineered sensors. This is a much more practical measure in that it approximates our human senses. Two different weights, two different colors, two different sound levels, two different amounts of sugar in one's...") |
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It is experimentally determined, and often defined something like | It is experimentally determined, and often defined something like | ||
'the amount of difference that people can detect 50% of the time'. | 'the amount of difference that people can detect 50% of the time'. | ||
This also puts a limit on, in reproduction, how much quantization is ''probably enough'' - how many colors is enough to reproduce on a monitor, how many notes in the human hearing range is probably enough. | |||
This sometimes depends a lot on what you are doing, in particular whether presenting both at the same time. | |||
Say, telling two adjacent pure tones apart reliably would give you on the order of 100 notes through the human range; | |||
telling ''simultaneous'' notes apart is helped by things like beat frequencies and you may achieve 1000. | |||
Telling them apart in ''music'' is probably lower again. | |||
Similarly, presenting two colors next to each other will land you , or after each other. | |||
...depending further on how - hard edge, soft edge, black inbetween? | |||
Latest revision as of 10:48, 23 May 2024