Datasets:

papadimas
/

trogs-26-test-images

source_base_id stringlengths 9 24	squeeze_id stringlengths 9 18	split stringclasses 1 value	rotation stringclasses 2 values	dpi int64 300 300	image_format stringclasses 2 values	width int64 1.28k 6.55k	height int64 779 7.17k	annotation_file stringlengths 38 53	baseline_angle float64 -6.01 0.67	transcript_raw stringlengths 21 590	transcript stringlengths 19 455	num_letters int64 19 437	num_boxes int64 19 437	num_rows int64 1 30	conditions_raw stringlengths 21 528	raw_annotation stringlengths 823 31k	letter_boxes_json stringlengths 1.01k 33.3k	line_specs_json stringclasses 5 values
IAS_27083	IAS_27083	test	Rotation1	300	PNG	2,778	2,584	IAS_27083_Rotation1_300dpi_letters.txt	0	IOIEII K TOY GYMNA OYDHN EEKEN AI TOIS ALEIFOMENOIS ARCHN EQYSIASEN TW TE ER PLANCNEYSEN POHSAS DE QOINHSE TOYS ALEIFOMENOYS KAI ANTA TOIS ALEIFOMENOIS PAR OL ROEISFERWN TA PROSENLEIPONT N FANERAN POEI BOYLOMENOS E EYNOIAN TE KA EKTENH ESIWN KAI MH EYRISKOME ASIARCHSEIN TON EPI KAI THS TE TOY GYMNA RAPHAS TWN ALEI H PA...	IOIEII KTOYGYMNA OYDHNEEKEN AITOISALEIFOMENOIS ARCHNEQYSIASENTWTEER PLANCNEYSENPOHSASDE QOINHSETOYSALEIFOMENOYSKAI ANTATOISALEIFOMENOISPAROL ROEISFERWNTAPROSENLEIPONT NFANERANPOEIBOYLOMENOSE EYNOIANTEKAEKTENH ESIWNKAIMHEYRISKOME ASIARCHSEINTONEPI KAITHSTETOYGYMNA RAPHASTWNALEI HPARASCWNTOTE ATHSEORTHSTWI EGENHQHHA WSDE...	304	304	19	000000 1 111 11110 00111 11111 00 0111 111111111111 00111 111111111 11 11 11 01111111111 111111 11 0001111 1111 111111111111 111 1111 1111 111111111111 111 11 0111111111 11 1111111111110 0 0001111 1111 1111111111 0 0111111 11 11 111110 11111 111 11 111111111 01111111111 111 110 011 111 11 111 11111 111111 111 1111 1 11...	# Baseline angle 0 # Boxes: x1 y1 x2 y2 x3 y3 x4 y4 1717 111 1717 246 1804 246 1804 111 1802 107 1802 239 1919 239 1919 107 1911 94 1911 245 1990 245 1990 94 1986 94 1986 229 2124 229 2124 94 2121 85 2121 223 2201 223 2201 85 2196 76 2196 234 2289 234 2289 76 1579 224 1579 359 1711 359 1711 224 1687 212 1687 365 1802 3...	[[1717.0,111.0,1717.0,246.0,1804.0,246.0,1804.0,111.0],[1802.0,107.0,1802.0,239.0,1919.0,239.0,1919.0,107.0],[1911.0,94.0,1911.0,245.0,1990.0,245.0,1990.0,94.0],[1986.0,94.0,1986.0,229.0,2124.0,229.0,2124.0,94.0],[2121.0,85.0,2121.0,223.0,2201.0,223.0,2201.0,85.0],[2196.0,76.0,2196.0,234.0,2289.0,234.0,2289.0,76.0],[15...	[]
IAS_27083	IAS_27083	test	Rotation2	300	PNG	2,780	2,578	IAS_27083_Rotation2_300dpi_letters.txt	0	IOIEII K TOY GYMNA OYDHN EEKEN AI TOIS ALEIFOMENOIS ARCHN EQYSIASEN TW TE ER PLANCNEYSEN POHSAS DE QOINHSE TOYS ALEIFOMENOYS KAI ANTA TOIS ALEIFOMENOIS PAR OL ROEISFERWN TA PROSENLEIPONT N FANERAN POEI BOYLOMENOS E EYNOIAN TE KA EKTENH ESIWN KAI MH EYRISKOME ASIARCHSEIN TON EPI KAI THS TE TOY GYMNA RAPHAS TWN ALEI H PA...	IOIEII KTOYGYMNA OYDHNEEKEN AITOISALEIFOMENOIS ARCHNEQYSIASENTWTEER PLANCNEYSENPOHSASDE QOINHSETOYSALEIFOMENOYSKAI ANTATOISALEIFOMENOISPAROL ROEISFERWNTAPROSENLEIPONT NFANERANPOEIBOYLOMENOSE EYNOIANTEKAEKTENH ESIWNKAIMHEYRISKOME ASIARCHSEINTONEPI KAITHSTETOYGYMNA RAPHASTWNALEI HPARASCWNTOTE ATHSEORTHSTWI EGENHQHHA WSDE...	304	304	19	000000 1 111 11111 11111 11111 00 0111 111111111111 00111 111111111 11 01 11 01111111111 111111 11 0011111 1111 111111111111 111 1111 1111 111111111111 111 11 0111111111 11 1111111111111 0 0001111 1111 1111111111 1 0111111 11 11 111111 01111 111 11 111111111 01111111111 111 111 011 111 11 111 11111 111111 111 1111 0 11...	# Baseline angle 0 # Boxes: x1 y1 x2 y2 x3 y3 x4 y4 1741 108 1741 261 1819 261 1819 108 1804 108 1804 238 1924 238 1924 108 1912 91 1912 226 1998 226 1998 91 2002 83 2002 221 2135 221 2135 83 2134 81 2134 221 2205 221 2205 81 2206 75 2206 219 2294 219 2294 75 1580 218 1580 355 1707 355 1707 218 1675 209 1675 352 1814 3...	[[1741.0,108.0,1741.0,261.0,1819.0,261.0,1819.0,108.0],[1804.0,108.0,1804.0,238.0,1924.0,238.0,1924.0,108.0],[1912.0,91.0,1912.0,226.0,1998.0,226.0,1998.0,91.0],[2002.0,83.0,2002.0,221.0,2135.0,221.0,2135.0,83.0],[2134.0,81.0,2134.0,221.0,2205.0,221.0,2205.0,81.0],[2206.0,75.0,2206.0,219.0,2294.0,219.0,2294.0,75.0],[15...	[]
IAS_27091_Merged	IAS_27091	test	Rotation2	300	PNG	6,552	2,745	IAS_27091_Merged_Rotation2_300dpi_letters.txt	0	CAIRETE OI PARIO NTES EGO DE ANTISTA TES HYOS ATARBO KEIMAI TEIDE QANON PATRIDA GEN PROLIPON ANTISTATES AQENAIOS	CAIRETEOIPARIO NTESEGODEANTISTA TESHYOSATARBOKEIMAI TEIDEQANONPATRIDA GENPROLIPONANTISTATES AQENAIOS	95	95	6	1111111 11 11111 1111 111 11 1111111 111 1111 111111 111111 11111 11111 1111111 111 11111111 1111111111 11111111	# Baseline angle 0 # Boxes: x1 y1 x2 y2 x3 y3 x4 y4 356 278 356 767 903 767 903 278 902 230 902 740 1450 740 1450 230 1458 219 1458 734 1670 734 1670 219 1674 255 1674 778 2106 778 2106 255 2100 247 2100 766 2541 766 2541 247 2590 254 2590 768 3117 768 3117 254 3095 266 3095 800 3603 800 3603 266 3591 295 3591 820 4093...	[[356.0,278.0,356.0,767.0,903.0,767.0,903.0,278.0],[902.0,230.0,902.0,740.0,1450.0,740.0,1450.0,230.0],[1458.0,219.0,1458.0,734.0,1670.0,734.0,1670.0,219.0],[1674.0,255.0,1674.0,778.0,2106.0,778.0,2106.0,255.0],[2100.0,247.0,2100.0,766.0,2541.0,766.0,2541.0,247.0],[2590.0,254.0,2590.0,768.0,3117.0,768.0,3117.0,254.0],[...	[]
IAS_27091	IAS_27091	test	Rotation1	300	PNG	6,478	2,721	IAS_27091_Rotation1_300dpi_letters.txt	0	CAIRETE OI PARIO NTES EGO DE ANTISTA TES HYOS ATARBO KEIMAI TEIDE QANON PATRIDA GEN PROLIPON ANTISTATES AQENAIOS	CAIRETEOIPARIO NTESEGODEANTISTA TESHYOSATARBOKEIMAI TEIDEQANONPATRIDA GENPROLIPONANTISTATES AQENAIOS	95	95	6	1111111 11 11111 1111 111 11 1111111 111 1111 111111 111111 11111 11111 1111111 111 11111111 1111111111 11111111	# Baseline angle 0 # Boxes: x1 y1 x2 y2 x3 y3 x4 y4 371 179 371 643 932 643 932 179 918 150 918 634 1422 634 1422 150 1448 156 1448 662 1651 662 1651 156 1710 174 1710 684 2054 684 2054 174 2100 194 2100 715 2494 715 2494 194 2549 218 2549 738 3089 738 3089 218 3062 237 3062 746 3543 746 3543 237 3570 248 3570 772 4147...	[[371.0,179.0,371.0,643.0,932.0,643.0,932.0,179.0],[918.0,150.0,918.0,634.0,1422.0,634.0,1422.0,150.0],[1448.0,156.0,1448.0,662.0,1651.0,662.0,1651.0,156.0],[1710.0,174.0,1710.0,684.0,2054.0,684.0,2054.0,174.0],[2100.0,194.0,2100.0,715.0,2494.0,715.0,2494.0,194.0],[2549.0,218.0,2549.0,738.0,3089.0,738.0,3089.0,218.0],[...	[]
IAS_27093	IAS_27093	test	Rotation1	300	PNG	3,516	1,488	IAS_27093_Rotation1_300dpi_letters.txt	0	AGAQOKLEA ANTIPATROY IEROPOLEITI CRHSTH CAIRE	AGAQOKLEA ANTIPATROY IEROPOLEITICRHSTH CAIRE	41	41	4	111111111 1111111111 11111111111 111111 11111	# Baseline angle 0 # Boxes: x1 y1 x2 y2 x3 y3 x4 y4 88 250 88 556 469 556 469 250 410 232 410 536 725 536 725 232 637 234 637 533 993 533 993 234 960 220 960 516 1237 516 1237 220 1214 214 1214 516 1485 516 1485 214 1440 205 1440 520 1695 520 1695 205 1634 222 1634 521 1964 521 1964 222 1920 190 1920 517 2196 517 2196 ...	[[88.0,250.0,88.0,556.0,469.0,556.0,469.0,250.0],[410.0,232.0,410.0,536.0,725.0,536.0,725.0,232.0],[637.0,234.0,637.0,533.0,993.0,533.0,993.0,234.0],[960.0,220.0,960.0,516.0,1237.0,516.0,1237.0,220.0],[1214.0,214.0,1214.0,516.0,1485.0,516.0,1485.0,214.0],[1440.0,205.0,1440.0,520.0,1695.0,520.0,1695.0,205.0],[1634.0,222...	[]
IAS_27093	IAS_27093	test	Rotation2	300	PNG	3,528	1,483	IAS_27093_Rotation2_300dpi_letters.txt	0	AGAQOKLEA ANTIPATROY IEROPOLEITI CRHSTH CAIRE	AGAQOKLEA ANTIPATROY IEROPOLEITICRHSTH CAIRE	41	41	4	111111111 1111111111 11111111111 111111 11111	# Baseline angle 0 # Boxes: x1 y1 x2 y2 x3 y3 x4 y4 84 246 84 570 460 570 460 246 401 225 401 556 732 556 732 225 643 230 643 544 991 544 991 230 953 221 953 515 1240 515 1240 221 1198 212 1198 509 1494 509 1494 212 1435 201 1435 515 1682 515 1682 201 1632 223 1632 515 1932 515 1932 223 1908 191 1908 509 2208 509 2208 ...	[[84.0,246.0,84.0,570.0,460.0,570.0,460.0,246.0],[401.0,225.0,401.0,556.0,732.0,556.0,732.0,225.0],[643.0,230.0,643.0,544.0,991.0,544.0,991.0,230.0],[953.0,221.0,953.0,515.0,1240.0,515.0,1240.0,221.0],[1198.0,212.0,1198.0,509.0,1494.0,509.0,1494.0,212.0],[1435.0,201.0,1435.0,515.0,1682.0,515.0,1682.0,201.0],[1632.0,223...	[]
IAS_27095	IAS_27095	test	Rotation1	300	PNG	3,852	779	IAS_27095_Rotation1_300dpi_letters.txt	0	MHNOFILE CRHSTE CAIRE	MHNOFILECRHSTECAIRE	19	19	1	11111111 111111 11111	# Baseline angle 0 # Boxes: x1 y1 x2 y2 x3 y3 x4 y4 27 358 27 685 359 685 359 358 311 350 311 704 552 704 552 350 519 337 519 682 801 682 801 337 765 329 765 630 1075 630 1075 329 1030 285 1030 697 1317 697 1317 285 1305 317 1305 655 1427 655 1427 317 1389 305 1389 642 1671 642 1671 305 1599 306 1599 605 1830 605 1830 ...	[[27.0,358.0,27.0,685.0,359.0,685.0,359.0,358.0],[311.0,350.0,311.0,704.0,552.0,704.0,552.0,350.0],[519.0,337.0,519.0,682.0,801.0,682.0,801.0,337.0],[765.0,329.0,765.0,630.0,1075.0,630.0,1075.0,329.0],[1030.0,285.0,1030.0,697.0,1317.0,697.0,1317.0,285.0],[1305.0,317.0,1305.0,655.0,1427.0,655.0,1427.0,317.0],[1389.0,305...	[]
IAS_27095	IAS_27095	test	Rotation2	300	PNG	3,860	794	IAS_27095_Rotation2_300dpi_letters.txt	0	MHNOFILE CRHSTE CAIRE	MHNOFILECRHSTECAIRE	19	19	1	11111111 111111 11111	# Baseline angle 0 # Boxes: x1 y1 x2 y2 x3 y3 x4 y4 30 377 30 688 355 688 355 377 310 375 310 701 546 701 546 375 519 352 519 690 790 690 790 352 768 333 768 662 1058 662 1058 333 1036 292 1036 718 1312 718 1312 292 1289 300 1289 674 1431 674 1431 300 1390 304 1390 667 1654 667 1654 304 1604 305 1604 603 1825 603 1825 ...	[[30.0,377.0,30.0,688.0,355.0,688.0,355.0,377.0],[310.0,375.0,310.0,701.0,546.0,701.0,546.0,375.0],[519.0,352.0,519.0,690.0,790.0,690.0,790.0,352.0],[768.0,333.0,768.0,662.0,1058.0,662.0,1058.0,333.0],[1036.0,292.0,1036.0,718.0,1312.0,718.0,1312.0,292.0],[1289.0,300.0,1289.0,674.0,1431.0,674.0,1431.0,300.0],[1390.0,304...	[]
IAS_27109	IAS_27109	test	Rotation1	300	PNG	2,648	2,058	IAS_27109_Rotation1_300dpi_letters.txt	0	OLKA MNAI DDIIII TON OLKA MNA A DHS POTHRIA KYD FIALA A EPIDWTA ARGYREON OLKA M EPANQEMATA LEIO FIALAN OLKAN DRA FIALAN OLKA DRAC FIALALKA DRAC	OLKAMNAIDDIIII TONOLKAMNAA DHSPOTHRIAKYD FIALAAEPIDWTA ARGYREONOLKAM EPANQEMATALEIO FIALANOLKANDRA FIALANOLKADRAC FIALALKADRAC	118	118	9	0111 1111 111111 111 1111 111 1 111 1101111 001 11111 1 0011101 11011111 1111 1 1111111111 1111 111111 11111 111 111111 1111 1110 11110001 1110	# Baseline angle 0 # Boxes: x1 y1 x2 y2 x3 y3 x4 y4 469 290 469 422 613 422 613 290 589 276 589 427 737 427 737 276 720 284 720 427 860 427 860 284 838 280 838 430 992 430 992 280 980 279 980 439 1147 439 1147 279 1135 293 1135 445 1284 445 1284 293 1271 277 1271 448 1425 448 1425 277 1413 270 1413 437 1483 437 1483 27...	[[469.0,290.0,469.0,422.0,613.0,422.0,613.0,290.0],[589.0,276.0,589.0,427.0,737.0,427.0,737.0,276.0],[720.0,284.0,720.0,427.0,860.0,427.0,860.0,284.0],[838.0,280.0,838.0,430.0,992.0,430.0,992.0,280.0],[980.0,279.0,980.0,439.0,1147.0,439.0,1147.0,279.0],[1135.0,293.0,1135.0,445.0,1284.0,445.0,1284.0,293.0],[1271.0,277.0...	[]
IAS_27109	IAS_27109	test	Rotation2	300	PNG	2,654	2,054	IAS_27109_Rotation2_300dpi_letters.txt	0	OLKA MNAI DDIIII TON OLKA MNA A DHS POTHRIA KYD FIALA A EPIDWTA ARGYREON OLKA M EPANQEMATA LEIO FIALAN OLKAN DRA FIALAN OLKA DRAC FIALALKA DRAC	OLKAMNAIDDIIII TONOLKAMNAA DHSPOTHRIAKYD FIALAAEPIDWTA ARGYREONOLKAM EPANQEMATALEIO FIALANOLKANDRA FIALANOLKADRAC FIALALKADRAC	118	118	9	0111 1111 111111 111 1111 111 1 111 1101111 111 11111 1 0110111 11111111 1111 1 1111111111 1111 111111 11111 111 111111 1111 1110 11110001 1100	# Baseline angle 0 # Boxes: x1 y1 x2 y2 x3 y3 x4 y4 441 266 441 405 591 405 591 266 580 268 580 420 745 420 745 268 715 275 715 424 853 424 853 275 842 270 842 435 990 435 990 270 966 264 966 441 1148 441 1148 264 1138 273 1138 439 1296 439 1296 273 1265 282 1265 435 1408 435 1408 282 1415 275 1415 440 1481 440 1481 27...	[[441.0,266.0,441.0,405.0,591.0,405.0,591.0,266.0],[580.0,268.0,580.0,420.0,745.0,420.0,745.0,268.0],[715.0,275.0,715.0,424.0,853.0,424.0,853.0,275.0],[842.0,270.0,842.0,435.0,990.0,435.0,990.0,270.0],[966.0,264.0,966.0,441.0,1148.0,441.0,1148.0,264.0],[1138.0,273.0,1138.0,439.0,1296.0,439.0,1296.0,273.0],[1265.0,282.0...	[]
IAS_27110	IAS_27110	test	Rotation1	300	PNG	1,667	3,295	IAS_27110_Rotation1_300dpi_letters.txt	0.13693	TONS TAS T ON SW XE TELE OSSWN KA UANTW EN ECONTAS YPER TOY T TOY BWMOY MATA WS DE KA A HRA ECHI TEYWN OSSA DETOI PENT	TONS TAST ONSW XETELE OSSWNKA UANTWEN ECONTAS YPERTOYT TOYBWMOY MATAWSDE KAAHRAECHI TEYWNOSSA DETOIPENT	91	91	13	1110 111 1 11 11 11 1111 11111 11 11111 11 1111111 1111 111 1 111 11110 1111 11 10 11 1 111 1111 11111 1111 11111 1110	# Baseline angle 0.1369303050999322 # Boxes: x1 y1 x2 y2 x3 y3 x4 y4 544 180 519.5822367209341 357.2066591305388 685 380 709.4177632790659 202.79334086946122 699 195 676.8810632804926 355.52342037995425 840 378 862.1189367195074 217.47657962004575 850 224 826.3328942383138 395.75892383694134 995 419 1018.6671057616862 ...	[[544.0,180.0,519.5822367209341,357.2066591305388,685.0,380.0,709.4177632790659,202.79334086946122],[699.0,195.0,676.8810632804926,355.52342037995425,840.0,378.0,862.1189367195074,217.47657962004575],[850.0,224.0,826.3328942383138,395.75892383694134,995.0,419.0,1018.6671057616862,247.24107616305866],[991.0,223.0,965.14...	[]
IAS_27110	IAS_27110	test	Rotation2	300	PNG	1,674	3,286	IAS_27110_Rotation2_300dpi_letters.txt	0.171554	TONS TAS T ON SW XE TELE OSSWN KA UANTW EN ECONTAS YPER TOY T TOY BWMOY MATA WS DE KA A HRA ECHI TEYWN OSSA DETOI PENT	TONS TAST ONSW XETELE OSSWNKA UANTWEN ECONTAS YPERTOYT TOYBWMOY MATAWSDE KAAHRAECHI TEYWNOSSA DETOIPENT	91	91	13	1110 111 1 11 11 11 1111 11111 11 11111 11 1111111 1111 111 1 111 11110 1111 11 10 11 1 111 1111 11111 1111 11111 1110	# Baseline angle 0.17155357815991135 # Boxes: x1 y1 x2 y2 x3 y3 x4 y4 548 185 522.0000473000664 335.06615497875515 689 364 714.9999526999336 213.93384502124485 715 203 690.260816839847 345.789263388499 830 370 854.739183160153 227.21073661150098 837 209 806.9538796713782 382.41976740430016 995 415 1025.0461203286218 24...	[[548.0,185.0,522.0000473000664,335.06615497875515,689.0,364.0,714.9999526999336,213.93384502124485],[715.0,203.0,690.260816839847,345.789263388499,830.0,370.0,854.739183160153,227.21073661150098],[837.0,209.0,806.9538796713782,382.41976740430016,995.0,415.0,1025.0461203286218,241.5802325956998],[1011.0,224.0,980.34187...	[]

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TROGS-26 Test Images

This dataset packages the 50 public test squeezes for the TROGS-26 / ICDAR 2026 competition, with two raking-light views per squeeze. It includes the official post-competition ground-truth letter annotations, README, and evaluation script released by Smith College.

Source dataset: https://scholarworks.smith.edu/dds_data/19/
Contest page: https://www.science.smith.edu/~nhowe/contest/trogs26.html
Related training/validation release: https://huggingface.co/datasets/papadimas/trogs-greek-squeezes

Split	Squeezes	Images	PNG	TIF
test	50	100	50	50

The loadable split is stored as a Hugging Face imagefolder dataset under data/test/. Each row is one full scan for one raking-light view. Metadata includes the source filename, logical squeeze id, rotation, image size, raw proxy-letter transcript, normalized transcript, letter-box coordinates, and the original annotation text.

The official auxiliary files are preserved at the repository root:

TROGS-26_Test_Annotations.zip
README.txt
contest_evaluation_v2.py
extracted annotation text files under annotations/

Loading

from datasets import load_dataset

ds = load_dataset("imagefolder", data_dir="hf://datasets/papadimas/trogs-26-test-images/data")

Notes

The transcription target is a Latin proxy alphabet for Ancient Greek letters, not Unicode Greek text. The transcript_raw field preserves source lacuna markers (*), while transcript removes lacuna markers and spaces following the official evaluation convention.

Some source filenames contain Merged for one of the two views. The source_base_id field preserves the filename stem before the rotation suffix; squeeze_id additionally removes _Merged so the two views of the same squeeze can be grouped together.

Citation

If you use this dataset, please cite the source competition release:

@inproceedings{howe2026trogs,
  title = {ICDAR 2026 Competition in Text Recognition on Greek Squeezes},
  author = {Howe, Nicholas R. and Hershkowitz, Aaron},
  booktitle = {Proceedings of the International Conference on Document Analysis and Recognition},
  year = {2026}
}

Recommended source citation:

Hershkowitz, Aaron; Howe, Nicholas; Cosgrove, Bebe; and Brown, Tajhini, "TROGS-26 Test Images" (2026). Data, Smith College, Northampton, MA. https://scholarworks.smith.edu/dds_data/19

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TROGS-26 Test Images

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Notes

Citation