This file contains 'on-line' handwritten words data collected on a thin Wacom PL100V integrated tablet and grey-scale LCD screen (i.e., long before the iPad!) in Summer/Autumn 1994 in a collaboration project between the handwriting group at Nijmegen University and Hewlett-Packard Bristol. HP donated this data to the International Unipen Foundation. Not within the Unipen data set (10.5281/zenodo.1195802) were the individually labeled characters, which are included in this data set. ___________________________________________________________________________________________________ Files overview plucoll-1994-2023.pdf Our report to HP, from 1996. Old postscript version refurbished to pdf in 2023 with minor changes. At the time of the report, 35 writers were in the data set. Ultimately there were 46 writers in total. plucoll-1994-2023.txt Flat text version of the .pdf ___________________________________________________________________________________________________ plucoll-2001.tgz Unipen file format pen-tip coordinates for words and .png images. plucoll-2001-tgz.lst 46 writers, 210 isolated words per writer ./plucoll/ ./plucoll/angelien/ ./plucoll/angelien/set1.dat ./plucoll/angelien/set6.dat ./plucoll/angelien/set2.dat ./plucoll/angelien/test.dat ./plucoll/angelien/set3.dat ./plucoll/angelien/set4.dat ./plucoll/willem/ ./plucoll/willem/set1.dat ./plucoll/willem/set5.dat ./plucoll/willem/set6.dat ./plucoll/willem/test.dat ./plucoll/willem/set3.dat ./plucoll/willem/set4.dat ./plucoll/piet/ ./plucoll/piet/set1.dat ./plucoll/piet/set6.dat ./plucoll/piet/set2.dat ./plucoll/piet/test.dat ./plucoll/piet/set3.dat ./plucoll/piet/set4.dat (etc.) ___________________________________________________________________________________________________ Plucoll-hwr-lbl.tgz Separate plain ASCII coordinate files (.hwr) with x,y,z and corresponding label files (.lbl) for characters Plucoll-hwr-lbl-tgz.txt ./Plucoll-hwr-lbl/ ./Plucoll-hwr-lbl/miep/ ./Plucoll-hwr-lbl/miep/set1/ ./Plucoll-hwr-lbl/miep/set1/miep-set1-035-bouquet.hwr ./Plucoll-hwr-lbl/miep/set1/miep-set1-035-bouquet.lbl ./Plucoll-hwr-lbl/miep/set1/miep-set1-089-fjord.hwr ./Plucoll-hwr-lbl/miep/set1/miep-set1-089-fjord.lbl ./Plucoll-hwr-lbl/miep/set1/miep-set1-166-sandwich.hwr ./Plucoll-hwr-lbl/miep/set1/miep-set1-166-sandwich.lbl ./Plucoll-hwr-lbl/miep/set1/miep-set1-006-afghanistan.hwr ./Plucoll-hwr-lbl/miep/set1/miep-set1-006-afghanistan.lbl (etc.) cat anton/set5/anton-set5-209-zigzag.lbl z 12 18 0.95 i 53 28 0.95 g 95 35 0.95 z 149 45 0.95 a 213 32 0.95 g 243 42 0.95 cat anton/set5/anton-set5-209-zigzag.hwr 3584 3500 100 3582 3502 100 3578 3502 100 3576 3502 100 3576 3502 100 3578 3502 100 3582 3504 100 3596 3508 100 3612 3512 100 3630 3522 100 3648 3526 100 . . . . . . (x y z 'pressure' 0=penup 100=pendown) ___________________________________________________________________________________________________PluColl-Letters-for-CogniGron.tgz Simplified version, ASCII with only (x,y) coordinates, 311925 characters PluColl-Letters-for-CogniGron-tgz.lst This collection was used for our IOP article on bio-inspired twitch ensemble trajectory control. ./Letters/ ./Letters/x/ ./Letters/x/Letter-x-ioff-349-npts-40-janneke-set3-018-appendix.xy ./Letters/x/Letter-x-ioff-174-npts-45-marieke-set4-034-borax.xy ./Letters/x/Letter-x-ioff-6-npts-35-hannie-set6-206-xylophone.xy ./Letters/x/Letter-x-ioff-143-npts-50-corrie-set5-072-dixieland.xy ./Letters/x/Letter-x-ioff-91-npts-45-janneke-set2-072-dixieland.xy ./Letters/x/Letter-x-ioff-41-npts-41-eelco-set2-081-excellent.xy ./Letters/x/Letter-x-ioff-186-npts-42-heleen-set6-034-borax.xy ./Letters/x/Letter-x-ioff-78-npts-67-floris-set4-130-luxe.xy ./Letters/x/Letter-x-ioff-62-npts-58-rintje-set3-146-oxford.xy ./Letters/x/Letter-x-ioff-161-npts-36-martijn-set3-034-borax.xy ./Letters/x/Letter-x-ioff-107-npts-33-saskia-set4-135-maxwell.xy ./Letters/x/Letter-x-ioff-59-npts-49-corrie-set6-078-excellent.xy ./Letters/x/Letter-x-ioff-168-npts-32-katrien-set4-161-reflex.xy (etc.) Filename tags: ioff is the index of the first coordinate of a character in the original .hwr file npts is the number of (x,y) points for that character cat Letter-_-ioff-203-npts-14-angelien-set3-161-reflex.xy 3942 3434 3952 3434 3962 3434 3982 3436 4002 3442 4026 3448 4054 3458 4082 3464 4112 3474 4134 3484 4160 3492 Note: the character '_' (underscore) represents the connecting stroke between two characters (if present) Explicit modeling of the connecting stroke was important in 'formal' rule-based approaches to handwriting recognition. Lambert Schomaker, May 2023

{"references": ["L. Vuurpijl and L. Schomaker, \"Finding structure in diversity: a hierarchical clustering method for the categorization of allographs in handwriting,\" Proceedings of the Fourth International Conference on Document Analysis and Recognition, Ulm, Germany, 1997, pp. 387-393 vol.1, doi: 10.1109/ICDAR.1997.619876."]}