Blinde of siggestremde mense kry toegang tot dokumente deur \u2019n skermleser te gebruik wat teks hardop lees of op \u2019n spesiale hardeware-braille-toestel laat verskyn. <\/p>\n
\u2019n Groot gedeelte tegniese en wetenskaplike materiaal bly egter ontoeganklik vir blinde of siggestremde mense, omdat wiskundige vergelykings en diagramme as beelde vertoon word en nie as teks wat \u2019n skermleser kan lees nie.<\/p>\n
S\u00f3 s\u00ea Rynhardt Kruger, wat onlangs sy doktorsgraad in elektroniese ingenieurswese aan die Universiteit Stellenbosch (US) behaal het. <\/p>\n
Kruger se PhD is getiteld \u201ctoeganklikheid van tegniese dokumente,\u201d wat metodes navors en ontwikkel wat dit vir blinde of siggestremde mense makliker kan maak om grafiese inligting in elektroniese dokumente wat nie teks bevat nie, te lees. <\/p>\n
Kruger, wat self blind gebore is, s\u00ea hy weet hoe moeilik dit is om vergelykings en diagramme in wetenskaplike dokumente te lees. \u201cGedurende my studiejare was die materiaal in my handboeke nie altyd toeganklik nie. Ek het besef dat baie tegniese dokumente nie aan bestaande toeganklikheidstandaarde vir blinde of siggestremde mense voldoen nie.\u201d <\/p>\n
Kruger was egter ondanks dit die eerste blinde mens wat sy BSc-honneurs- en meestersgraad in rekenaarwetenskap aan die US behaal het.<\/p>\n
Hy is passievol daaroor om mense met gestremdhede se toegang te verbreed en s\u00ea dit is belangrik om voortdurend na hulptegnologie te soek wat blinde mense of mense met \u2019n siggestremdheid kan gebruik om vergelykings en diagramme in wetenskaplike tekste te lees.<\/p>\n
\u201cTans moet grafiese materiaal eers na \u2019n toeganklike formaat omgeskakel word voordat hulle dit kan lees. Die probleem is dat diagramme steeds net deur tekstuele beskrywings of tasbare diagramme toeganklik is, en dit is duur om dit te reproduseer. Tekstuele beskrywings is dikwels onvoldoende om die ingewikkelde verhoudings tussen onderdele van diagramme soos lyne en reghoeke of die kontoere op \u2019n geografiese kaart te beskryf,\u201d s\u00ea Kruger.<\/p>\n
\u201cWanneer vergelykings in \u2019n toeganklike formaat beskikbaar is, moet hulle lini\u00ear gelees word, want dit is hoe wiskunde in huidige toeganklike formate uitgedruk word. Dit verhinder blinde lesers of persone met siggestremdhede om toegang tot die visuele uitleg van die vergelyking te kry.\u201d<\/p>\n
Volgens Kruger kan blinde of siggestremde lesers sy metodes gebruik om diagramme, geometriese vorms en vergelykings deur klanke en as gebare op \u2019n raakskerm of deur teksgebaseerde navigasie te verken.<\/p>\n
\u201cDie inhoud van diagramme word as \u2019n spesiale vorm van klank aan die leser gespeel, waarvandaan hulle die inhoud wat verken word, kan interpreteer. In die geval van \u2019n afwaartse lyn van bo links na onder regs op die skerm sal die gevolglike klank \u2019n klank wees wat afneem in toonhoogte,\u201d verduidelik hy.<\/p>\n
\u201cEk het twee bewegings uitgewerk wat blinde of siggestremde mense kan gebruik om inhoud op \u2019n raakskerm te verken. Wanneer een vinger oor die skerm getrek word, word die inhoud direk onder die vinger in \u2019n klank omgeskep. Wanneer twee vingers oor die skerm getrek word, tree die lyn tussen die twee vingers op as \u2019n skandeerder <\/p>\n
Hy wys daarop dat die formaat van die vergelykings wat in sy navorsingstudie gebruik is, soortgelyk is aan ontoeganklik vergelykings wat lesers moontlik in gepubliseerde materiaal sal te\u00ebkom.<\/p>\n
\u201cMy metodes stel blinde of siggestremde lesers in staat om regstreeks toegang tot grafiese materiaal te kry om vergelykings te lees en diagramme te verken deur net ? tablet te gebruik eerder as om vir duur hardeware of omskakelingsdienste te moet betaal.<\/p>\n
\u201cHierdie metodes sal mense help om \u2019n idee te kry van \u2019n diagram se vorm, waar die vorm self belangrik is (soos byvoorbeeld \u2019n voorheen onbekende geometriese vorm) en om toegang te kry tot materiaal wat reeds gepubliseer is en geskep is sonder om toeganklikheidstandaarde in ag te neem.\u201d<\/p>\n
Kruger s\u00ea hy wil graag h\u00ea sy metodes moet in \u2019n boekleestoepassing ingebou word om lesers in staat te stel om diagramme en vergelykings in sulke boeke te bestudeer.<\/p>\n","protected":false},"excerpt":{"rendered":"
Blinde of siggestremde mense kry toegang tot dokumente deur \u2019n skermleser te gebruik wat teks hardop lees of op \u2019n spesiale hardeware-braille-toestel laat 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