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captchaocr-dataset

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Formats:
imagefolder
Languages:
English
Russian
Size:
10K - 100K
Tags:
captcha
ocr
minecraft
anti-bot
Synthetic
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CaptchaOCR dataset — captchas of Minecraft anti-bot plugins, rendered

46 captcha types · 23000 labelled PNG (500 per type) · 23 upstream plugins · 218.2 МБ

This repository holds the images and the labels of the CaptchaOCR captcha dataset: the captchas that open-source Minecraft anti-bot plugins draw, re-rendered by this project's own generators, with a machine-readable label for every image.

Every PNG here is our own render — 23000 images drawn by our Java generators. No picture, page or answer taken from a third-party service is published here; the reference screenshots of the upstream plugins stay in the project's working tree.

The dataset is published as plain files (PNG + labels.jsonl), not as a loading script: every sample is a PNG next to a one-line JSON record, so any training loop can read it without datasets, without a network round-trip and without trusting remote code.

What is inside

captcha types 46
labelled samples 23000
PNG files 23000
upstream plugins 23
trees 2
size of the PNG files 218.2 МБ (228769043 B)
size of the whole repository (PNG + labels.jsonl + card) ≈ 224.8 МБ
types with an answer band (roi) 29 (rows with: 14499, without: 8501)
types where text != answer 9
reconstruction modes faithful 25 · clean-room 16 · reconstructed 5
combined alphabet size 129 symbols

How this release was made

  • 46 captcha types × 500 images = 23000 PNG. Every type was re-rendered on 2026-10-22 on the author's machine with the project's Java 21 generators (dataset/generator and dataset/generator_ru), then validated and uploaded.
  • This dataset is a machine artefact. The generators are not seeded: the fonts are the same, but the samples themselves are random, so a re-render of the same type produces a different set of pictures. The images here are one particular render of 2026-10-22 — the generators and the labels are the reproducible part, the pixels are not.
  • The reference screenshots of the upstream plugins (the real_shots/ folders of the Russian tree — 517 reference screenshots, 523 files in total) are not published here — see What is NOT published below.

Layout 

data/<tree>/<...>/<type>/<file>

Concretely, the local generator tree dataset is uploaded as-is under data/:

  • data/<tree>/<...>/<type>/NNN.png — the images,
  • data/<tree>/<...>/<type>/labels.jsonl — the labels of that type,
  • README.md — this card,
  • LICENSE — the per-plugin licence breakdown of the data (the same table as below, plus what each licence means for you),
  • dataset_inventory.json — the machine-readable summary of everything below,
  • .gitattributes — the Git LFS rules for the binary files.
дерево типов PNG байт
out 34 17000 167 МБ
out_ru 12 6000 51.1 МБ

The label format

One JSON object per line, one line per image, UTF-8:

field meaning
file PNG name in the same directory (001.png …)
plugin upstream plugin the type came from
captcha captcha type inside that plugin
answer what the player has to type into the answer field
text what is actually drawn on the picture (differs from answer in some types)
prompt the task text as the plugin shows it
roi the answer band [x, y, w, h], or null if the answer is not in the frame
width, height PNG size
source where the type came from: upstream class and method (file#method) — the audit trail

text is the target for a recogniser, answer is the answer for a solver. In the types where they differ (Russian number words, arithmetic), the text -> answer conversion is a separate step, not an OCR task.

The band rule: a band that does not fit into the frame is not a band; in that case roi = null.

The types

тип дерево PNG с полосой алфавит длина text (мин/мед/макс) уник. ответов лицензия
out/Archy-X/Krypton/map out 500 500/500 латиница (62) 5/5/5 500 no licence (all rights reserved)
out/Archy-X/Krypton/menu out 500 0/500 латиница+знаки (26) 3/9/18 72 no licence (all rights reserved)
out/China2B2T/Captcha/wool out 500 0/500 латиница+знаки (7) 9/9/9 1 GPL-3.0
out/FeelingAlive0/AdvancedCaptcha/button out 500 500/500 латиница+пробел+знаки (29) 18/24/28 220 MIT
out/FeelingAlive0/AdvancedCaptcha/math out 500 500/500 цифры+пробел+знаки (14) 5/6/7 134 MIT
out/InstantlyMoist/Captcha/textcaptcha out 500 0/500 латиница (26) 5/5/5 500 MIT
out/JSH32/Minecaptcha/map out 500 500/500 латиница (61) 4/4/4 500 MIT
out/Joey61021/captcha/colorgui out 500 500/500 латиница (19) 3/4/6 6 MIT
out/LagBug/XProtect/code out 500 0/500 латиница (62) 6/6/6 500 MIT
out/LagBug/XProtect/color out 500 0/500 латиница+пробел (20) 3/5/9 11 MIT
out/LagBug/XProtect/different out 500 0/500 латиница+знаки (11) 13/13/13 1 MIT
out/LagBug/XProtect/drop out 500 500/500 латиница (4) 4/4/4 1 MIT
out/LagBug/XProtect/equation out 500 500/500 цифры+пробел+знаки (13) 5/6/7 29 MIT
out/LagBug/XProtect/gui out 500 500/500 латиница+пробел+знаки (41) 3/9/17 42 MIT
out/LagBug/XProtect/jump out 500 500/500 латиница (4) 4/4/4 1 MIT
out/LagBug/XProtect/map out 500 0/500 латиница (62) 6/6/6 500 MIT
out/LagBug/XProtect/picture out 500 0/500 латиница (20) 3/4/6 20 MIT
out/LagBug/XProtect/reverse out 500 500/500 латиница (62) 6/6/6 500 MIT
out/LagBug/XProtect/slot out 500 500/500 цифры (8) 1/1/1 8 MIT
out/LagBug/XProtect/sneak out 500 500/500 латиница (5) 5/5/5 1 MIT
out/Mrbysco/Captcha/math out 500 500/500 цифры+пробел+знаки (12) 5/7/7 152 MIT
out/Yukun99/Captchas/itemslot out 500 500/500 латиница+пробел+знаки (47) 3/10/20 188 no licence (all rights reserved)
out/Z4OLLIEZ4/reCaptcha/captchasx out 500 500/500 латиница+пробел (20) 3/5/10 13 MIT
out/haq/mapcha/map out 500 499/500 латиница (61) 4/4/4 500 MIT
out/irootdev/AnBot/captcha out 500 0/500 латиница (36) 3/3/3 475 GPL-3.0
out/jSdCool/minecaptcha/image out 500 500/500 латиница+пробел+знаки (15) 61/67/70 500 CC0-1.0
out/jSdCool/minecaptcha/text out 500 500/500 латиница (62) 8/8/8 500 CC0-1.0
out/jonesdevelopment/sonar/complex out 500 0/500 латиница (20) 3/4/4 494 GPL-3.0
out/jonesdevelopment/sonar/legacy out 500 0/500 латиница (20) 3/4/4 496 GPL-3.0
out/jonesdevelopment/sonar/standard out 500 0/500 латиница (20) 3/3/4 500 GPL-3.0
out/just-captcha/ProstoCaptcha/map out 500 500/500 латиница (58) 6/6/6 500 MIT
out/laforetbrut/are-you-sure/code out 500 500/500 латиница (32) 6/6/6 500 MIT
out/n1zamu/NCaptcha/anvil out 500 500/500 цифры (10) 3/5/5 495 MIT
out/ringoame196-s-mcPlugin/ReproductionCAPTCHA/map out 500 500/500 латиница (16) 5/5/5 500 no licence file (all rights reserved)
out_ru/BotFilter/map out_ru 500 0/500 цифры (10) 4/5/5 494 BSD-2-Clause + запрет на коммерческий хостинг
out_ru/CaptchaGUI/clickblock out_ru 500 0/500 цифры (7) 1/1/1 7 no licence file (all rights reserved)
out_ru/CaptchaVerifyZ/map out_ru 500 500/500 латиница (36) 5/5/5 500 all rights reserved (Modrinth)
out_ru/GalleryCaptcha/ru-numberword out_ru 500 500/500 кириллица+пробел (20) 7/21/28 382 не установлена (см. source в labels.jsonl)
out_ru/GalleryCaptcha/ru-numberword-caption out_ru 500 500/500 кириллица+пробел (20) 3/21/28 380 не установлена (см. source в labels.jsonl)
out_ru/GalleryCaptcha/ru-object-swatch out_ru 500 0/500 кириллица (15) 5/6/7 5 не установлена (см. source в labels.jsonl)
out_ru/GalleryCaptcha/ru-symbols out_ru 500 500/500 кириллица (43) 3/3/3 499 не установлена (см. source в labels.jsonl)
out_ru/GalleryCaptcha/ru-web out_ru 500 500/500 латиница (62) 5/5/5 500 не установлена (см. source в labels.jsonl)
out_ru/LimboFilter/framed2x2 out_ru 500 0/500 кириллица+пробел (20) 6/21/28 389 AGPL-3.0
out_ru/LimboFilter/framed3x3 out_ru 500 0/500 кириллица+пробел (20) 6/22/28 386 AGPL-3.0
out_ru/LimboFilter/map out_ru 500 500/500 кириллица+пробел (20) 6/21/28 388 AGPL-3.0
out_ru/LimboFilter/symbols out_ru 500 500/500 кириллица (43) 3/3/3 499 AGPL-3.0

The plugins and their licences

Each row of the dataset comes from a different upstream plugin, and those plugins do not share one licence. The licence of the data is the licence of the plugin the row came from — check the column before you use the data. The mode column says how the type was rebuilt:

  • faithful — the upstream algorithm was re-implemented exactly, including its defects;
  • clean-room — rebuilt from the upstream behaviour without copying its assets;
  • reconstructed — measured from reference screenshots and rebuilt from scratch, so the pixels are not the upstream ones.
плагин типов PNG лицензия режим
Archy-X/Krypton 2 1000 no licence (all rights reserved) clean-room
BotFilter 1 500 BSD-2-Clause + запрет на коммерческий хостинг clean-room
CaptchaGUI 1 500 no licence file (all rights reserved) clean-room
CaptchaVerifyZ 1 500 all rights reserved (Modrinth) clean-room
China2B2T/Captcha 1 500 GPL-3.0 clean-room
FeelingAlive0/AdvancedCaptcha 2 1000 MIT faithful
GalleryCaptcha 5 2500 не установлена (см. source в labels.jsonl) reconstructed
InstantlyMoist/Captcha 1 500 MIT faithful
JSH32/Minecaptcha 1 500 MIT faithful
Joey61021/captcha 1 500 MIT faithful
LagBug/XProtect 12 6000 MIT faithful
LimboFilter 4 2000 AGPL-3.0 clean-room
Mrbysco/Captcha 1 500 MIT faithful
Yukun99/Captchas 1 500 no licence (all rights reserved) clean-room
Z4OLLIEZ4/reCaptcha 1 500 MIT faithful
haq/mapcha 1 500 MIT faithful
irootdev/AnBot 1 500 GPL-3.0 clean-room
jSdCool/minecaptcha 2 1000 CC0-1.0 faithful
jonesdevelopment/sonar 3 1500 GPL-3.0 clean-room
just-captcha/ProstoCaptcha 1 500 MIT faithful
laforetbrut/are-you-sure 1 500 MIT faithful
n1zamu/NCaptcha 1 500 MIT faithful
ringoame196-s-mcPlugin/ReproductionCAPTCHA 1 500 no licence file (all rights reserved) clean-room

Licence by licence

licence upstream plugins captcha types PNG
AGPL-3.0 LimboFilter 4 2000
BSD-2-Clause + запрет на коммерческий хостинг BotFilter 1 500
CC0-1.0 jSdCool/minecaptcha 2 1000
GPL-3.0 China2B2T/Captcha, irootdev/AnBot, jonesdevelopment/sonar 5 2500
MIT FeelingAlive0/AdvancedCaptcha, InstantlyMoist/Captcha, JSH32/Minecaptcha, Joey61021/captcha, LagBug/XProtect, Mrbysco/Captcha, Z4OLLIEZ4/reCaptcha, haq/mapcha, just-captcha/ProstoCaptcha, laforetbrut/are-you-sure, n1zamu/NCaptcha 23 11500
all rights reserved (Modrinth) CaptchaVerifyZ 1 500
no licence (all rights reserved) Archy-X/Krypton, Yukun99/Captchas 3 1500
no licence file (all rights reserved) CaptchaGUI, ringoame196-s-mcPlugin/ReproductionCAPTCHA 2 1000
не установлена (см. source в labels.jsonl) GalleryCaptcha 5 2500

source in every labels.jsonl row points at the upstream class and method the type was re-implemented from, so the provenance of each row can be audited without trusting this table.

  • out/Archy-X/Krypton/map — режим clean-room, плагин Archy-X/Krypton; происхождение: com.archyx.krypton.captcha.MapGenerator#generateCode
  • out/Archy-X/Krypton/menu — режим clean-room, плагин Archy-X/Krypton; происхождение: com.archyx.krypton.captcha.CaptchaMenu
  • out/China2B2T/Captcha/wool — режим clean-room, плагин China2B2T/Captcha; происхождение: org.china2b2t.captchalib.Main#onJoin
  • out/Yukun99/Captchas/itemslot — режим clean-room, плагин Yukun99/Captchas; происхождение: me.yukun.captchas.gui.Captcha
  • out/irootdev/AnBot/captcha — режим clean-room, плагин irootdev/AnBot; происхождение: iroot.Main#getCaptcha
  • out/jonesdevelopment/sonar/complex — режим clean-room, плагин jonesdevelopment/sonar; происхождение: xyz.jonesdev.sonar.captcha.complex.ComplexCaptchaGenerator#createImage
  • out/jonesdevelopment/sonar/legacy — режим clean-room, плагин jonesdevelopment/sonar; происхождение: xyz.jonesdev.sonar.captcha.legacy.LegacyCaptchaGenerator#createImage
  • out/jonesdevelopment/sonar/standard — режим clean-room, плагин jonesdevelopment/sonar; происхождение: xyz.jonesdev.sonar.captcha.StandardCaptchaGenerator#createImage
  • out/ringoame196-s-mcPlugin/ReproductionCAPTCHA/map — режим clean-room, плагин ringoame196-s-mcPlugin/ReproductionCAPTCHA; происхождение: AuthMapManager#makeAuthImage
  • out_ru/BotFilter/map — режим clean-room, плагин BotFilter; происхождение: ru.leymooo.botfilter.captcha.generator.CaptchaPainter#draw
  • out_ru/CaptchaGUI/clickblock — режим clean-room, плагин CaptchaGUI; происхождение: me.supl1na.captcha.CaptchaListener#onPlayerJoin
  • out_ru/CaptchaVerifyZ/map — режим clean-room, плагин CaptchaVerifyZ; происхождение: com.Mateitaa1.CaptchaVerifyZ$CaptchaMapRenderer#render
  • out_ru/GalleryCaptcha/ru-numberword — режим reconstructed, плагин GalleryCaptcha; происхождение: GalleryCaptcha/ru-numberword: clean-room reconstruction of a gallery-style captcha family, measured from reference screenshots; no vendor assets redistributed; renderer: net.elytrium.limbofilter.captcha.painter.CaptchaPainter#drawCaptcha; net.elytrium.limbofilter.captcha.CaptchaGenerator#randomAnswer; net.elytrium.limbofilter.captcha.CaptchaGenerator#spellNumber
  • out_ru/GalleryCaptcha/ru-numberword-caption — режим reconstructed, плагин GalleryCaptcha; происхождение: GalleryCaptcha/ru-numberword: clean-room reconstruction of a gallery-style captcha family, measured from reference screenshots; no vendor assets redistributed; renderer: net.elytrium.limbofilter.captcha.painter.CaptchaPainter#drawCaptcha; net.elytrium.limbofilter.captcha.CaptchaGenerator#randomAnswer; net.elytrium.limbofilter.captcha.CaptchaGenerator#spellNumber
  • out_ru/GalleryCaptcha/ru-object-swatch — режим reconstructed, плагин GalleryCaptcha; происхождение: GalleryCaptcha/ru-object-swatch: clean-room reconstruction of the object-grid captcha family, measured from reference screenshots; no vendor assets redistributed
  • out_ru/GalleryCaptcha/ru-symbols — режим reconstructed, плагин GalleryCaptcha; происхождение: GalleryCaptcha/ru-symbols: clean-room reconstruction of a gallery-style captcha family, measured from reference screenshots; no vendor assets redistributed; renderer: net.elytrium.limbofilter.captcha.painter.CaptchaPainter#drawCaptcha; net.elytrium.limbofilter.captcha.CaptchaGenerator#randomAnswer
  • out_ru/GalleryCaptcha/ru-web — режим reconstructed, плагин GalleryCaptcha; происхождение: GalleryCaptcha/ru-web: clean-room reconstruction of the generic web-captcha family, measured from reference screenshots; no vendor assets redistributed
  • out_ru/LimboFilter/framed2x2 — режим clean-room, плагин LimboFilter; происхождение: net.elytrium.limbofilter.captcha.painter.CaptchaPainter#drawCaptcha; net.elytrium.limbofilter.captcha.CaptchaGenerator#randomAnswer; net.elytrium.limbofilter.captcha.CaptchaGenerator#spellNumber
  • out_ru/LimboFilter/framed3x3 — режим clean-room, плагин LimboFilter; происхождение: net.elytrium.limbofilter.captcha.painter.CaptchaPainter#drawCaptcha; net.elytrium.limbofilter.captcha.CaptchaGenerator#randomAnswer; net.elytrium.limbofilter.captcha.CaptchaGenerator#spellNumber
  • out_ru/LimboFilter/map — режим clean-room, плагин LimboFilter; происхождение: net.elytrium.limbofilter.captcha.painter.CaptchaPainter#drawCaptcha; net.elytrium.limbofilter.captcha.CaptchaGenerator#randomAnswer; net.elytrium.limbofilter.captcha.CaptchaGenerator#spellNumber
  • out_ru/LimboFilter/symbols — режим clean-room, плагин LimboFilter; происхождение: net.elytrium.limbofilter.captcha.painter.CaptchaPainter#drawCaptcha; net.elytrium.limbofilter.captcha.CaptchaGenerator#randomAnswer

Alphabets

The labels are not pure ASCII: some types are Russian number words, some are arithmetic expressions, some contain spaces and punctuation.

  • out/Archy-X/Krypton/map — алфавит (62 символов): 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
  • out/Archy-X/Krypton/menu — алфавит (26 символов): ABCDEFGHIJKLMNOPQRSTUVWYZ_
  • out/China2B2T/Captcha/wool — алфавит (7 символов): EILMOW_
  • out/FeelingAlive0/AdvancedCaptcha/button — алфавит (29 символов): CHMNPST[]abcdeghiklnoprstuwy
  • out/FeelingAlive0/AdvancedCaptcha/math — алфавит (14 символов): *+-0123456789
  • out/InstantlyMoist/Captcha/textcaptcha — алфавит (26 символов): abcdefghijklmnopqrstuvwxyz
  • out/JSH32/Minecaptcha/map — алфавит (61 символов): 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYabcdefghijklmnopqrstuvwxyz
  • out/Joey61021/captcha/colorgui — алфавит (19 символов): BLOPRYadegiklmnoruw
  • out/LagBug/XProtect/code — алфавит (62 символов): 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
  • out/LagBug/XProtect/color — алфавит (20 символов): abcdeghiklnopqrtuwy
  • out/LagBug/XProtect/different — алфавит (11 символов): ABCDEKLMOR_
  • out/LagBug/XProtect/drop — алфавит (4 символов): dopr
  • out/LagBug/XProtect/equation — алфавит (13 символов): +-0123456789
  • out/LagBug/XProtect/gui — алфавит (41 символов): 'BCDEGHIJLMNOPQRSabcdefghiklmnoprstuvwyz
  • out/LagBug/XProtect/jump — алфавит (4 символов): jmpu
  • out/LagBug/XProtect/map — алфавит (62 символов): 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
  • out/LagBug/XProtect/picture — алфавит (20 символов): abcdefghiklmnoprstuw
  • out/LagBug/XProtect/reverse — алфавит (62 символов): 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
  • out/LagBug/XProtect/slot — алфавит (8 символов): 12345678
  • out/LagBug/XProtect/sneak — алфавит (5 символов): aekns
  • out/Mrbysco/Captcha/math — алфавит (12 символов): +0123456789
  • out/Yukun99/Captchas/itemslot — алфавит (47 символов): 'ABCDEFGHIJLMNOPQRSTVWabcdefghiklmnoprstuvwxyz
  • out/Z4OLLIEZ4/reCaptcha/captchasx — алфавит (20 символов): abcdeghiklmnoprtuwy
  • out/haq/mapcha/map — алфавит (61 символов): 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYabcdefghijklmnopqrstuvwxyz
  • out/irootdev/AnBot/captcha — алфавит (36 символов): 0123456789abcdefghijklmnopqrstuvwxyz
  • out/jSdCool/minecaptcha/image — алфавит (15 символов): ,0123456789gim
  • out/jSdCool/minecaptcha/text — алфавит (62 символов): 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
  • out/jonesdevelopment/sonar/complex — алфавит (20 символов): abcdefhjkmnoprstuxyz
  • out/jonesdevelopment/sonar/legacy — алфавит (20 символов): abcdefhjkmnoprstuxyz
  • out/jonesdevelopment/sonar/standard — алфавит (20 символов): abcdefhjkmnoprstuxyz
  • out/just-captcha/ProstoCaptcha/map — алфавит (58 символов): 23456789ABCDEFGHIJKLMNPQRSTUVWXYZabcdefghijklmnpqrstuvwxyz
  • out/laforetbrut/are-you-sure/code — алфавит (32 символов): 23456789ABCDEFGHJKLMNPQRSTUVWXYZ
  • out/n1zamu/NCaptcha/anvil — алфавит (10 символов): 0123456789
  • out/ringoame196-s-mcPlugin/ReproductionCAPTCHA/map — алфавит (16 символов): 0123456789ABCDEF
  • out_ru/BotFilter/map — алфавит (10 символов): 0123456789
  • out_ru/CaptchaGUI/clickblock — алфавит (7 символов): 1234567
  • out_ru/CaptchaVerifyZ/map — алфавит (36 символов): 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ
  • out_ru/GalleryCaptcha/ru-numberword — алфавит (20 символов): авдеикмнопрстцчшыья
  • out_ru/GalleryCaptcha/ru-numberword-caption — алфавит (20 символов): авдеикмнопрстцчшыья
  • out_ru/GalleryCaptcha/ru-object-swatch — алфавит (15 символов): абежзйклнрстчыё
  • out_ru/GalleryCaptcha/ru-symbols — алфавит (43 символов): 0123456789ЁАБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯ
  • out_ru/GalleryCaptcha/ru-web — алфавит (62 символов): 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
  • out_ru/LimboFilter/framed2x2 — алфавит (20 символов): авдеикмнопрстцчшыья
  • out_ru/LimboFilter/framed3x3 — алфавит (20 символов): авдеикмнопрстцчшыья
  • out_ru/LimboFilter/map — алфавит (20 символов): авдеикмнопрстцчшыья
  • out_ru/LimboFilter/symbols — алфавит (43 символов): 0123456789ЁАБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯ

What is NOT published here

  • The reference screenshots of the upstream plugins. The author's working tree contains 517 reference screenshots of other people's plugins (523 files in total in the real_shots/ directories of the Russian tree). They are other people's images: they are not part of this repository and are not redistributed in any form. Every published PNG is our own render.
  • No picture, page or answer taken from a third-party commercial service is published here.
  • No model weights, no training logs, no measured-result files — this repository is data only.

How to load it

The dataset is a directory of files. The shortest way:

import json
from pathlib import Path

root = Path("data")           # clone of the repository
for labels in root.rglob("labels.jsonl"):
    for line in labels.read_text(encoding="utf-8").splitlines():
        if not line.strip():
            continue
        row = json.loads(line)
        image = labels.parent / row["file"]     # PNG next to the label
        band = row["roi"]                        # [x, y, w, h] or None
        answer = row["answer"]                  # what the player types
        drawn = row["text"]                     # what is drawn

dataset_inventory.json in the root of the repository is the per-type summary: sample count, alphabet, label lengths, presence of the band, licence. Read it to build a list of training types without walking the pictures.

Provenance and honesty

  • Every published image is our own render. All 23000 PNG in this repository were produced by this project's own Java generators — not by a live server, not by a third-party service, and not by copying anybody else's pictures. The renders reproduce the upstream algorithms (font, palette, noise, layout, even the upstream defect), but the pixels are a re-render, not a screenshot of a real session.

  • The reference screenshots of the upstream plugins are not part of this repository: they are other people's images, they stay in the project's working tree and are not redistributed.

  • 25 of the 46 types are faithful ports — the upstream algorithm was re-implemented exactly, including its defects.

  • 16 types are clean-room reconstructions, and 5 are marked reconstructed: they were measured from reference screenshots and rebuilt from scratch, so they are not faithful ports and their pixels are not the upstream ones. The list is below, with the provenance string each type carries in labels.jsonl.

  • Numbers in this card are computed from labels.jsonl by tools/upload_dataset.py at upload time; they are not typed by hand.

Licence

  • The data is published under the licences of the upstream plugins, one per type — see the plugin table above. There is no single licence for the whole dataset; that is what the YAML field license_name: mixed-per-plugin-licences means.
  • The file LICENSE in the root of this repository holds the same breakdown in full: the per-plugin table, what each licence means for you, and an explicit note about the plugins that granted no licence at all.
  • The generator code of the project is under a separate licence.
  • A user of this dataset must comply with the licence of the plugin each row came from.

Gallery

Три контактных листа: все 46 типов, по шесть картинок на тип. Красная рамка — полоса (roi), из неё модель читает ответ; подпись «модель: …» — ответ опубликованной модели (зелёная — точный, красная — ошибка).

Контактный лист 1/3 — 46 типов, 6 картинок на тип

Контактный лист 2/3 — 46 типов, 6 картинок на тип

Контактный лист 3/3 — 46 типов, 6 картинок на тип

Скорее таблица — опубликованная модель на всех 46 типах

Titlehhhh/captchaocr-ppocrv6 (PP-OCRv6_medium_rec + WiSE-FT, α = 0.4). Кроп: полоса roi, где она есть, иначе кадр, обрезанный по рамке чернил. Эталон — нарисованная строка text. «все 500» открывает папку типа на Hub.

Тип n exact match CER все 500
out/Archy-X/Krypton/map 500 90.8% 0.020 все 500 →
out/Archy-X/Krypton/menu 500 0.0% 0.999 все 500 →
out_ru/BotFilter/map 500 74.0% 0.084 все 500 →
out_ru/CaptchaGUI/clickblock 500 0.0% 6.274 все 500 →
out_ru/CaptchaVerifyZ/map 500 99.8% 0.000 все 500 →
out/China2B2T/Captcha/wool 500 0.0% 1.000 все 500 →
out/FeelingAlive0/AdvancedCaptcha/button 500 0.0% 0.605 все 500 →
out/FeelingAlive0/AdvancedCaptcha/math 500 99.8% 0.001 все 500 →
out_ru/GalleryCaptcha/ru-numberword 500 0.0% 1.000 все 500 →
out_ru/GalleryCaptcha/ru-numberword-caption 500 0.0% 1.000 все 500 →
out_ru/GalleryCaptcha/ru-object-swatch 500 0.0% 1.000 все 500 →
out_ru/GalleryCaptcha/ru-symbols 500 0.8% 0.902 все 500 →
out_ru/GalleryCaptcha/ru-web 500 94.6% 0.012 все 500 →
out/InstantlyMoist/Captcha/textcaptcha 500 10.8% 0.598 все 500 →
out/JSH32/Minecaptcha/map 500 95.0% 0.013 все 500 →
out/Joey61021/captcha/colorgui 500 82.8% 0.029 все 500 →
out/LagBug/XProtect/code 500 0.0% 0.990 все 500 →
out/LagBug/XProtect/color 500 0.0% 1.000 все 500 →
out/LagBug/XProtect/different 500 0.0% 1.000 все 500 →
out/LagBug/XProtect/drop 500 100.0% 0.000 все 500 →
out/LagBug/XProtect/equation 500 100.0% 0.000 все 500 →
out/LagBug/XProtect/gui 500 100.0% 0.000 все 500 →
out/LagBug/XProtect/jump 500 100.0% 0.000 все 500 →
out/LagBug/XProtect/map 500 0.0% 0.992 все 500 →
out/LagBug/XProtect/picture 500 0.0% 1.000 все 500 →
out/LagBug/XProtect/reverse 500 90.4% 0.018 все 500 →
out/LagBug/XProtect/slot 500 100.0% 0.000 все 500 →
out/LagBug/XProtect/sneak 500 100.0% 0.000 все 500 →
out_ru/LimboFilter/framed2x2 500 0.0% 1.000 все 500 →
out_ru/LimboFilter/framed3x3 500 0.0% 1.000 все 500 →
out_ru/LimboFilter/map 500 0.0% 1.000 все 500 →
out_ru/LimboFilter/symbols 500 0.4% 0.905 все 500 →
out/Mrbysco/Captcha/math 500 86.4% 0.030 все 500 →
out/Yukun99/Captchas/itemslot 500 81.4% 0.018 все 500 →
out/Z4OLLIEZ4/reCaptcha/captchasx 500 92.6% 0.011 все 500 →
out/haq/mapcha/map 500 94.4% 0.015 все 500 →
out/irootdev/AnBot/captcha 500 94.8% 0.018 все 500 →
out/jSdCool/minecaptcha/image 500 0.0% 0.554 все 500 →
out/jSdCool/minecaptcha/text 500 98.6% 0.002 все 500 →
out/jonesdevelopment/sonar/complex 500 48.4% 0.219 все 500 →
out/jonesdevelopment/sonar/legacy 500 45.8% 0.255 все 500 →
out/jonesdevelopment/sonar/standard 500 63.8% 0.150 все 500 →
out/just-captcha/ProstoCaptcha/map 500 66.4% 0.078 все 500 →
out/laforetbrut/are-you-sure/code 500 1.8% 0.681 все 500 →
out/n1zamu/NCaptcha/anvil 500 100.0% 0.000 все 500 →
out/ringoame196-s-mcPlugin/ReproductionCAPTCHA/map 500 95.6% 0.009 все 500 →

Микро по всем 46 типам: 50.2% exact, CER 0.5322; медиана по типам: 65.1% exact, CER 0.1173. На тех же 7 удержанных типах этот код даёт 61.2% micro / 63.8% median — опубликованные с моделью числа были 61.2% / 63.8%, то есть пайплайн воспроизводится.

Почему «все 46» ниже, чем «7 удержанных»: в наборе 46 типов есть типы без полосы (кадр целиком), группа C (это вообще не задача OCR: ответ — название цвета, номер слота, картинка) и кириллические типы, символы которых нет в словаре модели (в словаре PP-OCRv6 нет ни одной кириллической буквы).

Модели

Единый протокол: 20 картинок на тип, два режима — «полоса» и «весь кадр»; число — micro exact match по 29 типам, у которых есть полоса. Строки «наши» измерены другим протоколом (500 картинок на тип, разбиение по типам) и в один столбец с чужими моделями не сопоставимы.

Модель полоса кадр лицензия примечание
PaddlePaddle/PP-OCRv6_medium_rec_onnx 55.2% 3.4% Apache-2.0 29 типов с полосой, 20 картинок на тип
PaddlePaddle/cyrillic_PP-OCRv5_mobile_rec_onnx 46.2% 1.6% Apache-2.0 29 типов с полосой, 20 картинок на тип
PaddlePaddle/PP-OCRv5_mobile_rec_onnx 46.2% 0.7% Apache-2.0 29 типов с полосой, 20 картинок на тип
easyocr 32.8% — Apache-2.0 только старый набор legacy64 (8 типов)
anuashok/ocr-captcha-v3 29.7% 1.6% Apache-2.0 29 типов с полосой, 20 картинок на тип
graycat660/doctr-crnn-vgg16-bn-russian-onnx 27.8% 0.5% Apache-2.0 29 типов с полосой, 20 картинок на тип
Graf-J/captcha-crnn-base 8.3% 0.3% MIT 29 типов с полосой, 20 картинок на тип
Graf-J/captcha-crnn-finetuned 6.7% 0.0% MIT 29 типов с полосой, 20 картинок на тип
Graf-J/captcha-conv-transformer-finetuned 6.4% 0.3% MIT 29 типов с полосой, 20 картинок на тип
emelnov/ocr-captcha-v4-mailru 4.3% 0.0% (tag not set; base TrOCR = MIT) 29 типов с полосой, 20 картинок на тип
jtrecenti/txtcaptcha-crnn 0.3% 0.0% MIT 29 типов с полосой, 20 картинок на тип
microsoft/trocr-base-printed — — MIT замер не состоялся: ValueError: You need to specify either text or text_target.
Titlehhhh/captchaocr-ppocrv6 61.2% — Apache-2.0 PP-OCRv6_medium_rec + WiSE-FT α=0.4; 7 удержанных типов, 3500 картинок — другой протокол, с чужими моделями в один столбец не сравнивается
наш CRNN + CTC (обучен с нуля, не опубликован) 38.1% — - другой протокол (500 картинок на тип, разбиение по типам): невиданные типы micro 38.1% (n=1999), свои типы 100.0% — это запоминание, а не обобщение

Полный замер по 46 типам (с примерами «эталон → ответ модели»): reports/model_scoreboard.json в репозитории проекта.
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