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description=You need to find a specific Unicode Character? With Shapecatcher.com you can search through a database of characters by simply drawing your character into a box. The about page explains a bit more how shapecatcher works under its hood.;
author=Benjamin Milde;
keywords=unicode, character recognition, draw, cuda, webapp, html5, classifier, drawing, search engine, shapes, shape context, recaptcha, recaptcha solver, holistic word recognition;

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Text of the page (random words):
shapecatcher about drawbox about fonts contact about you know what some character looks like but you ve forgotten its name or its unicode code point now what do you do shapecatcher is a new website that helps you to find specific unicode characters just by sketching their shape currently about 10000 of the most important unicode characters are compared to your sketch and are analysed for similarities under the hood shapecatcher uses so called shape contexts to find similarities between two shapes shape contexts a robust mathematical way of describing the concept of similarity between shapes is a feature descriptor first proposed by serge belongie and jitendra malik you can find an indepth explanation of the shape context matching framework that i used in my bachelor thesis on the security of recatpcha in the end it is quite a bit different from the matching framework that belongie and malik proposed in 2000 but still based on the idea of shape contexts the engine that runs this site is a rewrite of what i developed during my bachelor thesis to make things faster i used cuda to accelereate some portions of the framework and nvidia graphics cards for general purpose computing each query on this website is processed by a graphics card making the comparsion process over 15 times faster than on a cpu in essence cuda makes it possible to provide a near realtime expierence and to handle higher loads on this website 2011 2025 benjamin milde