apca-introduction

commit

0df253af9185d8cd99f1f537614c106c83503c25

parent

7d4ff79088cab5c641b5668434018966f9833909

Author

Tobias Bengfort <tobias.bengfort@posteo.de>

Date

2022-08-05 11:55

typo: reasonable flare is 0.0025, not 0.025

see https://github.com/xi/apca-introduction/issues/1#issuecomment-1197997302

Diffstat

3 files changed, 2 insertions, 5 deletions

diff --git a/analysis.md b/analysis.md

@@ -325,11 +325,9 @@ I plotted curves for both the Weber-Fechner model (log) and the Stevens model
  325   325 (pow) with different parameters.
  326   326 
  327   327 -   The log curve with a flare of 0.05 (WCAG 2) is closer to the pow curve with
  328    -1     an exponent of 1/3
   -1   328     an exponent of 1/3 and a flare of 0.0025
  329   329 -   The log curve with a flare of 0.4 is closer to the pow curves with
  330   330     exponents 0.56 and 0.68 (similar to APCA)
  331    -1 -   The pow curve with an exponent of 1/3 **and** a flare of 0.025 is somewhere
  332    -1     in the middle.
  333   331 
  334   332 This shows that a big part of the different results between WCAG 2.x and APCA
  335   333 are caused by a different choice in parameters. If we were to change the flare

diff --git a/plots/lightness_comparison.png b/plots/lightness_comparison.png

diff --git a/plots/lightness_comparison.py b/plots/lightness_comparison.py

@@ -23,8 +23,7 @@ if __name__ == '__main__':
   23    23 
   24    24 	weber(0.05)
   25    25 	weber(0.4)
   26    -1 	stevens(0, 0.333)
   27    -1 	stevens(0.025, 0.333)
   -1    26 	stevens(0.0025, 0.333)
   28    27 	stevens(0, 0.56)
   29    28 	stevens(0, 0.68)
   30    29