apca-introduction, branch HEADThe missing introduction to APCAfc14f511209b3d2c9b9b488bc79366c247e145b52025-08-26T04:03:22Z2025-08-26T04:03:22ZtypoTobias Bengforttobias.bengfort@posteo.detypo
b34fe0e2286a99fa3236f9588c4270b9d2c017db2025-08-06T21:13:37Z2025-08-06T21:13:37ZtypoTobias Bengforttobias.bengfort@posteo.detypo
01642b31d6f181b14c0589541a2adae3850c2b3b2025-05-10T20:06:52Z2025-05-10T20:06:52Zanalysis: tweak threshold sectionTobias Bengforttobias.bengfort@posteo.deanalysis: tweak threshold section
23d736da71aa8f0ffe7a6af75b57e09276404da32025-03-21T13:28:57Z2025-04-06T12:45:17Zrewrite analysisTobias Bengforttobias.bengfort@posteo.derewrite analysis
- leave out some bits about which I am not 100% sure
- leave out some bits that are not that relevant
- restructure
8f4e00f99fb14f64ced461c86aeb6fb84c2206ca2025-03-21T10:57:32Z2025-03-21T13:20:26Zbetter algorithm and threshold linksTobias Bengforttobias.bengfort@posteo.debetter algorithm and threshold links
154c5a9b4146a8ed7f12b4799c2d911aec1cb6a22025-03-21T10:49:01Z2025-03-21T10:54:46ZREADME: include threshold tablesTobias Bengforttobias.bengfort@posteo.deREADME: include threshold tables
1acb8e1a3de4faafa93eb02385cc37cf53a4245a2025-03-21T10:36:54Z2025-03-21T10:54:46Zupdate example screenshotsTobias Bengforttobias.bengfort@posteo.deupdate example screenshots
91d9fc6f1d5fa6180401455677c0db9b2f5311f82025-03-21T10:28:09Z2025-03-21T10:54:46Zexamples: add dark modeTobias Bengforttobias.bengfort@posteo.deexamples: add dark mode
wcag works better in dark context
f1594db5e1db90d1bae971ee642bd36bb59a8b972025-03-21T10:27:49Z2025-03-21T10:54:46Zexample: avoid ×Tobias Bengforttobias.bengfort@posteo.deexample: avoid ×
48bf496337e858ae0cdd9f57447874d82913387f2025-03-21T08:19:38Z2025-03-21T10:54:46ZREADME: rephrase criticismTobias Bengforttobias.bengfort@posteo.deREADME: rephrase criticism
770b18db0838d86372d169b09845846be3022d4d2025-03-21T08:18:45Z2025-03-21T08:18:45ZREADME: migration -> comparisonTobias Bengforttobias.bengfort@posteo.deREADME: migration -> comparison
f600d00d741e45ce808aa3816165a565482583fe2025-03-21T08:18:17Z2025-03-21T08:18:31ZREADME: stop refering to APCA thresholdsTobias Bengforttobias.bengfort@posteo.deREADME: stop refering to APCA thresholds
0d419e7f45c11d09b0917bf791dad1ebe6f668282025-03-21T08:17:40Z2025-03-21T08:18:03Zfix APCA rangeTobias Bengforttobias.bengfort@posteo.defix APCA range
2968ef09f837dcfdca4b296133de8631ac788b932025-03-21T08:17:26Z2025-03-21T08:17:26ZAPCA is no longer mentioned in the WCAG 3 draftTobias Bengforttobias.bengfort@posteo.deAPCA is no longer mentioned in the WCAG 3 draft
f36acc6c64f00132e9fa2c96bbddf7e361d89c5a2023-09-14T14:41:31Z2023-09-14T14:46:11Ztweak analysisTobias Bengforttobias.bengfort@posteo.detweak analysis
13c1be744cbdd4f9079afaa2a2911a477460b63d2023-09-14T14:32:52Z2023-09-14T14:32:52Zanalysis: better explain impact of exponentsTobias Bengforttobias.bengfort@posteo.deanalysis: better explain impact of exponents
6afe5c2670ea4113cc1622828910d5ae5b675fcb2023-09-14T14:13:52Z2023-09-14T14:13:52Zanalysis: question breaking compaibility in conclusionTobias Bengforttobias.bengfort@posteo.deanalysis: question breaking compaibility in conclusion
4977315fef452c9c9e1240f8a9f7cd9a348af3502023-09-14T14:13:41Z2023-09-14T14:13:41Zanalysis: mention stevens in conclusionTobias Bengforttobias.bengfort@posteo.deanalysis: mention stevens in conclusion
d18073c92c1f95b9e224ff672e7c4e36d4c01f1b2023-09-14T08:51:44Z2023-09-14T08:51:44Zfix indentationTobias Bengforttobias.bengfort@posteo.defix indentation
7f98da84eec120329e3565074406c7930bbe4bdd2022-11-20T15:16:05Z2022-11-20T15:16:05ZtypoTobias Bengforttobias.bengfort@posteo.detypo
7ca03c646ccd7bda82e78a5da20fd99716a991df2022-11-17T08:15:07Z2022-11-20T15:11:35Zrm note about srGB weightsTobias Bengforttobias.bengfort@posteo.derm note about srGB weights
not sure if they really depend on human perception or if they are just
the amount of light emitted by the different colors parts in a pixel
2ae4c59da7f14825376ba646cced1ab90a3f6bbd2022-11-17T08:15:01Z2022-11-20T15:11:35ZtypoTobias Bengforttobias.bengfort@posteo.detypo
986d511c62f15953350fa0ea4e96f8e5921e8e5a2022-11-17T08:11:47Z2022-11-20T15:11:35Zmention font-based thresholds in READMETobias Bengforttobias.bengfort@posteo.demention font-based thresholds in README
aad047023ae4b47bb3f091a8a8ffdb4974f93deb2022-08-19T17:28:45Z2022-08-19T17:35:07Zmention APCA flare valueTobias Bengforttobias.bengfort@posteo.demention APCA flare value
5a2f7c7b387de65a01851fb47286d19ab915636f2022-08-19T16:11:17Z2022-08-19T17:33:14Zcomment on different exponents in APCATobias Bengforttobias.bengfort@posteo.decomment on different exponents in APCA
3abe9e6cef2e0f75cfe36dff19fb0184a244cd132022-08-19T16:11:08Z2022-08-19T17:33:14Zrelate exponents to CIECAM02Tobias Bengforttobias.bengfort@posteo.derelate exponents to CIECAM02
7d4009352edc1ce52bbb93eabb2403cc7f3f45222022-08-19T15:48:38Z2022-08-19T17:33:14ZtypoTobias Bengforttobias.bengfort@posteo.detypo
27cb34cdedde170670622389adee9d1a52dce9da2022-08-19T15:46:48Z2022-08-19T17:33:14Zuse J for lightnessTobias Bengforttobias.bengfort@posteo.deuse J for lightness
L is usually used for absolute luminance
0df253af9185d8cd99f1f537614c106c83503c252022-08-05T11:55:56Z2022-08-19T17:33:14Ztypo: reasonable flare is 0.0025, not 0.025Tobias Bengforttobias.bengfort@posteo.detypo: reasonable flare is 0.0025, not 0.025
see https://github.com/xi/apca-introduction/issues/1#issuecomment-1197997302
7d4ff79088cab5c641b5668434018966f98339092022-08-13T07:45:09Z2022-08-13T07:45:09ZtypoTobias Bengforttobias.bengfort@posteo.detypo
c5905bfdc7345f589f0d475bae92cfb2e060b8582022-08-07T12:50:18Z2022-08-07T12:50:18Zadd Comparison heading for thresholds sectionTobias Bengforttobias.bengfort@posteo.deadd Comparison heading for thresholds section
ba30c425ab709c9bb382b970b204ed3c9a547b352022-08-07T11:06:36Z2022-08-07T11:06:36Zadd some sourcesTobias Bengforttobias.bengfort@posteo.deadd some sources
a766058ea9e559c64a38512d64e4778287037f062022-08-06T08:11:04Z2022-08-06T08:11:04Zfixup 4ec0dad: adapt number in conclusionTobias Bengforttobias.bengfort@posteo.defixup 4ec0dad: adapt number in conclusion
f43b4ccf7aafcd5d4cc3aefddb42fe3afebc0f512022-08-06T08:09:18Z2022-08-06T08:09:18Zrm misleading conformence level labels from examplesTobias Bengforttobias.bengfort@posteo.derm misleading conformence level labels from examples
4ec0dadfd1529e5c51bf5a2e80cf08ae9e7406cc2022-08-06T07:58:12Z2022-08-06T07:58:42Zrework coverage tablesTobias Bengforttobias.bengfort@posteo.derework coverage tables
a896283ee9fcd5f906e25ccd5b439b54e2be342f2022-08-06T07:56:37Z2022-08-06T07:58:37Zcoverage: include total difference for WCAG comparisonTobias Bengforttobias.bengfort@posteo.decoverage: include total difference for WCAG comparison
8e031d0e232be824514aa64a3c6ff625d2446b9b2022-08-06T07:08:02Z2022-08-06T07:10:44Zchanges examplesTobias Bengforttobias.bengfort@posteo.dechanges examples
- add grey
- reduce back to 4
- RGB order
046089ed07d227eac68c150c8c658f34c8ff2a942022-08-06T06:45:53Z2022-08-06T06:45:53Zs/stevenson/stevens/Tobias Bengforttobias.bengfort@posteo.des/stevenson/stevens/
785aba4da6d8029a86aadbffbe28b28f2e67a5a72022-08-06T06:40:36Z2022-08-06T06:40:36Zdo not talk about WCAG 2.x in past tenseTobias Bengforttobias.bengfort@posteo.dedo not talk about WCAG 2.x in past tense
45f1884465b4eda7a3c52fe22d3006ad1d6943572022-08-06T06:34:42Z2022-08-06T06:34:42Zadd blue exampleTobias Bengforttobias.bengfort@posteo.deadd blue example
51d76efd9c3f4e59b25a46b6163641a8d6c5982b2022-08-06T06:17:57Z2022-08-06T06:17:57Zuse nbsp for WCAG 2.xTobias Bengforttobias.bengfort@posteo.deuse nbsp for WCAG 2.x
2989da99d661a7abdb2949a7e14ed20499d13c9a2022-08-05T10:47:36Z2022-08-05T10:47:36ZtyposTobias Bengforttobias.bengfort@posteo.detypos
81cf96cc89c2333a42ca2e716a6c6c99f84c37652022-08-05T05:07:58Z2022-08-05T10:00:43Zrework analysis based on Weber/Stevens distinctionTobias Bengforttobias.bengfort@posteo.derework analysis based on Weber/Stevens distinction
3370f941f5fdbdf75ac5b11e374895970eff3adb2022-08-04T04:46:25Z2022-08-04T04:47:06Zfocus conclusion more on policyTobias Bengforttobias.bengfort@posteo.defocus conclusion more on policy
5d8f12e1c76385db0d4877281e8ac722489efecc2022-08-04T04:16:27Z2022-08-04T04:16:27ZtypoTobias Bengforttobias.bengfort@posteo.detypo
b61b586b2649c9b92496741e857a0f1dc4b1c8672022-08-04T04:14:48Z2022-08-04T04:15:03Zplots: add lightness comparisonTobias Bengforttobias.bengfort@posteo.deplots: add lightness comparison
4f761ed3625fa9dc304c8d7f206869bc719442be2022-08-04T04:14:10Z2022-08-04T04:14:10Zspatial frequency: conclude that it should only be used to define thresholdsTobias Bengforttobias.bengfort@posteo.despatial frequency: conclude that it should only be used to define thresholds
a6a166dfe59a509db02cd24eb029f851d0199c4a2022-08-02T07:16:12Z2022-08-03T05:02:39Zuse l for lightnessTobias Bengforttobias.bengfort@posteo.deuse l for lightness
95880645e9e0baaf647ee4cde44cde4cc342d62a2022-07-31T22:18:27Z2022-07-31T22:26:53Zexpand conclusionTobias Bengforttobias.bengfort@posteo.deexpand conclusion
3441ef2954cee304745ba0dcb3dc429d45d3690e2022-07-31T22:04:24Z2022-07-31T22:09:09Zadd contrast constancy caveat to spation frequency sectionTobias Bengforttobias.bengfort@posteo.deadd contrast constancy caveat to spation frequency section
0ca48c409bb28ab37fea6f10865d07ac88d970012022-07-31T22:03:55Z2022-07-31T22:03:55Zrm "APCA is strictre" generalizationTobias Bengforttobias.bengfort@posteo.derm "APCA is strictre" generalization
f2b8d652a1abbc13d50ea13410155c712b3ffbcc2022-07-29T11:29:46Z2022-07-29T11:30:35Zmore generic coverage scriptTobias Bengforttobias.bengfort@posteo.demore generic coverage script
71e0f37534ea7787c61f62e678e1e7d3e16dfedb2022-07-29T10:44:25Z2022-07-29T10:48:00Zuse & instead of * for counting np arraysTobias Bengforttobias.bengfort@posteo.deuse & instead of * for counting np arrays
fb11a95bb6e48b11365b20cbaff1670a1fc5b69e2022-07-29T10:44:05Z2022-07-29T10:48:00Zrm unused codeTobias Bengforttobias.bengfort@posteo.derm unused code
f902d58b5fcf58e7da70a79b4c78bebfd3d4d0612022-07-29T06:07:12Z2022-07-29T10:48:00Zterm: monotonicTobias Bengforttobias.bengfort@posteo.determ: monotonic
7290347bc5e132032462156f3d04f85df103e34b2022-07-29T04:20:38Z2022-07-29T10:48:00Zadd george box quoteTobias Bengforttobias.bengfort@posteo.deadd george box quote
4ed86c8a70fc9bde482b2c2f701d07420cd3dd6f2022-07-29T04:12:49Z2022-07-29T10:48:00Zhighlight diagonals in coverage tablesTobias Bengforttobias.bengfort@posteo.dehighlight diagonals in coverage tables
b39fb7a6e86960226fd89a9767e1a083fbdff02b2022-07-28T14:22:51Z2022-07-28T14:23:35Zuse coverage data from analysis tablesTobias Bengforttobias.bengfort@posteo.deuse coverage data from analysis tables
1c287a27a741e821da34e56e432d1220058821b22022-07-28T14:18:59Z2022-07-28T14:23:32Zavoid referrin to WCAG 2.x levels in the context of APCATobias Bengforttobias.bengfort@posteo.deavoid referrin to WCAG 2.x levels in the context of APCA
7b2a3faa79c7faaa2ee119b6cbb27a6726f8f3502022-07-27T06:54:15Z2022-07-27T06:54:15Zuse log scales for contrast comparison plotsTobias Bengforttobias.bengfort@posteo.deuse log scales for contrast comparison plots
f837f7f885d2465390c83e43e832a4ddbe4c85172022-07-22T05:20:10Z2022-07-22T05:29:02Zrm obsolete note on different color rangesTobias Bengforttobias.bengfort@posteo.derm obsolete note on different color ranges
76284baf84c658bfd0e52305802618977491110f2022-07-22T05:19:27Z2022-07-22T05:29:02Zadd colorbars to contrast comparisonTobias Bengforttobias.bengfort@posteo.deadd colorbars to contrast comparison
79b3ad0f4b18e208d989b3a479b38adcf49bdd762022-07-22T05:10:15Z2022-07-22T05:10:15ZFixup f0bae95: adapt examples to additional levelsTobias Bengforttobias.bengfort@posteo.deFixup f0bae95: adapt examples to additional levels
fcadae0981dc4b83553402509f5b58364078c0662022-07-22T04:27:09Z2022-07-22T04:27:09Zexplain that 0.4 was just a guessTobias Bengforttobias.bengfort@posteo.deexplain that 0.4 was just a guess
3cb0bc7270de561799d6588384b5955d6f2890872022-07-20T07:16:40Z2022-07-20T07:16:40Zcompare APCA to itself with inverted fg/bgTobias Bengforttobias.bengfort@posteo.decompare APCA to itself with inverted fg/bg
5ba42ff5d2aeeec02a2d4c98ddd0626e092c718a2022-07-20T07:01:52Z2022-07-20T07:01:52ZtypoTobias Bengforttobias.bengfort@posteo.detypo
38af8207fb102b91db6f5989ef5123a7f18842ed2022-07-20T06:52:10Z2022-07-20T06:52:10Ztweak analysis wordingTobias Bengforttobias.bengfort@posteo.detweak analysis wording
5518aa00d4c3a873be6a04d99a7a8abbd22baef22022-07-20T06:49:00Z2022-07-20T06:49:00Zanalysis: add note on my backgroundTobias Bengforttobias.bengfort@posteo.deanalysis: add note on my background
e2709fa10cccb02162888f0fab910203d70fbdd82022-07-18T20:22:21Z2022-07-18T20:29:59Zadd coverage tablesTobias Bengforttobias.bengfort@posteo.deadd coverage tables
28922b6cf7e90a3d81c12acd9813735d8f8019eb2022-07-18T19:19:14Z2022-07-18T20:24:05Zfix typosTobias Bengforttobias.bengfort@posteo.defix typos
2695b72560d0b6abc101937b4de58e999c47b1862022-07-17T14:27:22Z2022-07-18T20:24:04Zinclude contrast comparison in analysisTobias Bengforttobias.bengfort@posteo.deinclude contrast comparison in analysis
00ef8b24583a2279873d3c0aecc882046187b8a62022-07-17T14:27:14Z2022-07-18T20:23:35Zadd contrast comparisonTobias Bengforttobias.bengfort@posteo.deadd contrast comparison
8596c1c989f1b973de6dcd67f68803419997cce12022-07-17T05:59:10Z2022-07-18T20:23:35Zmention developer ergonomics of differenceTobias Bengforttobias.bengfort@posteo.demention developer ergonomics of difference
f0bae95c61153505e7a7f524a3d219c09fd7a1f12022-07-17T05:48:32Z2022-07-18T20:23:34Zadd more level colorsTobias Bengforttobias.bengfort@posteo.deadd more level colors
acdb62f96becd7115e9d0f0e921aaef56b01d0262022-07-17T05:08:22Z2022-07-18T20:23:31Zexporess doubt about normalization artifactsTobias Bengforttobias.bengfort@posteo.deexporess doubt about normalization artifacts
cfb081a78afb73ff1d1db5818e03016edb9cd5fe2022-07-16T10:40:57Z2022-07-17T14:32:59Zrefine wcag6 value to 0.4Tobias Bengforttobias.bengfort@posteo.derefine wcag6 value to 0.4
9305232ec5f36394397fe6682decb75cec12c5892022-07-17T04:55:03Z2022-07-17T14:32:59Zuse ratio as measure for errorTobias Bengforttobias.bengfort@posteo.deuse ratio as measure for error
1126a01c61885de64eae7eb1152cd0e8c5e5958b2022-07-16T19:59:15Z2022-07-17T14:32:58Znormalize sRGBtoY before comparisonTobias Bengforttobias.bengfort@posteo.denormalize sRGBtoY before comparison
1cb50665affef87b2ef825e5aad0d2bfe6b749b62022-07-16T09:57:05Z2022-07-17T14:32:19Zadd analysisTobias Bengforttobias.bengfort@posteo.deadd analysis
2860a9a9db41c1b87941bdbd6f9fad198a357b812022-07-16T09:57:01Z2022-07-16T09:59:05Zadd sRGBtoY_comparisonTobias Bengforttobias.bengfort@posteo.deadd sRGBtoY_comparison
3cf1a55eac51fcc03e0a47a6ca2af881683635622022-07-14T19:07:25Z2022-07-16T09:59:05Zfix wcag definitionTobias Bengforttobias.bengfort@posteo.defix wcag definition
https://www.w3.org/WAI/WCAG21/errata/
ac1b653efe1bc9629c67010ed6db1838f67e5f982022-07-14T18:50:31Z2022-07-16T09:59:05Zuse coverage data from a uniformly distributed sampleTobias Bengforttobias.bengfort@posteo.deuse coverage data from a uniformly distributed sample
08abca01ae7c0367d372a6438cef8e977ac4d8f22022-07-14T09:03:45Z2022-07-16T09:59:05Zadd note on quality of the resultsTobias Bengforttobias.bengfort@posteo.deadd note on quality of the results
da53b32fc80f93d49aa9ee03c8470314c841a45a2022-07-14T08:20:50Z2022-07-16T09:59:05Zsum up APCA results compared to WCAGTobias Bengforttobias.bengfort@posteo.desum up APCA results compared to WCAG
313921840729ddcb3a9f0bc64db04ee982ed43ed2022-07-14T08:11:46Z2022-07-16T09:59:05Zuse own examples in READMETobias Bengforttobias.bengfort@posteo.deuse own examples in README
ef0e957527400163b0ca706f993011977368d4e92022-07-14T08:06:20Z2022-07-16T09:59:05Zrender examplesTobias Bengforttobias.bengfort@posteo.derender examples
0baa93b4a2be342c55f4ee2309a1e5edeacb4d772022-07-13T12:47:49Z2022-07-16T09:59:05Zadd faviconTobias Bengforttobias.bengfort@posteo.deadd favicon
350711d47bee9f386945831b2c50f8b39ee6d51f2022-07-13T12:09:17Z2022-07-16T09:59:05Zrevert >90 categoryTobias Bengforttobias.bengfort@posteo.derevert >90 category
https://git.apcacontrast.com/documentation/APCA_in_a_Nutshell
> Lc 90 is a suggested maximum for very large and bold fonts (greater
> than 36px bold), and large areas of color. Small fonts do not have a
> maximum.
Not sure if this is relevant. At the moment it is mostly confusing.
3df4fa022c59427e3be3ba538b1b333aefee56592022-07-15T12:45:05Z2022-07-16T09:59:05Zadd toolTobias Bengforttobias.bengfort@posteo.deadd tool
afce56b362b813d36aa200eb812ab9b6618df14f2022-07-15T12:44:55Z2022-07-16T09:59:05Zadd contrast implementationsTobias Bengforttobias.bengfort@posteo.deadd contrast implementations