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Tim “h3adache” Chen
I'm just a figment of your imagination.
I'm just a figment of your imagination.
About
Tim's posts

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Gin-Fu Chen was tagged in Tim Chen's album.
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Cambodia
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lol clever acronym
What #Google Thinks About #Windows

Define:Windows

A computer operating system with a graphical user interface.
Windows Means "Work Is Never Done On a Windows Systems"
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My parking bill for leaving my motorcycle in the garage all winter. Good thing I pay monthly :P
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Gin-Fu Chen was tagged in Gin-Ting Chen's album.
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lmao
How not to design a CAPTCHA

Unfortunately Sony missed the entire point of a CAPTCHA. Instead of using an obfuscated image which is difficult for computers to recognize the characters, they include the CAPTCHA's unobfuscated characters in HTML and use CSS and JavaScript to make the characters appear slightly distorted.

While taking a Digital Image and Video Processing class (EE 371R at utexas.edu), I picked up a summer hobby of writing CAPTCHA breakers. Most CAPTCHAs can be decoded with a combination of Gaussian edge detection and XOR difference analysis with known characters. However this one falls to a simple regex.
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