驗證碼

http://www.verydemo.com/demo_c92_i75438.html
http://softwarerecs.stackexchange.com/questions/708/php-ocr-library

http://www.verydemo.com/demo_c92_i75438.html
http://blog.csdn.net/hongquan1991/article/details/8541415
https://code.google.com/p/tesseract-ocr/
http://www.oschina.net/news/40027/6-opensource-ocr-tools
http://blog.lyhdev.com/2011/04/groovy-tesseract-ocr.html

ImageMagick
http://www.imagemagick.org/Usage/





OTC
http://www.gretai.org.tw/web/inc/authnum.php

http://www.gretai.org.tw/web/stock/aftertrading/broker_trading/download_ALLCSV.php?curstk=3630&stk_date=1031202&auth=QAUXC


list: need to get image / view state / event validation

http://bsr.twse.com.tw/bshtm/CaptchaImage.aspx?guid=becb9965-b18b-4381-9d77-1cdb815d4cf4
http://bsr.twse.com.tw/bshtm/CaptchaImage.aspx?guid=4158a63f-dca6-440c-a408-7ad35d5d3039

<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="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" />

<input type="hidden" name="__EVENTVALIDATION" id="__EVENTVALIDATION" value="/wEdAAYOTEoblaqpT4jx3Y+Jqru4fMmuxAJNAJcNkRRsVeJwwqKURZav/+YrVMqaWE2hvMxJwK4Ohf3nRgXHkFhQen1PRSciNdPYWmINCrip1wqw01PJCA0uL9aE2sjICZqv6GpQAqeC6xQp7AgU0B517B/i" />

__EVENTTARGET=&__EVENTARGUMENT=&__LASTFOCUS=&__VIEWSTATE=%2FwEPDwUJOTAxMjkxMjg3D2QWAgIDD2QWBAIBD2QWAmYPZBYEZg9kFgJmDxAPFgYeB0NoZWNrZWRnHglGb3JlQ29sb3IKAB4EXyFTQgIEZGRkZAIBD2QWAgIBDw8WBB8BCgAfAgIEZGQCAw9kFgQCAw8PFgIeBFRleHQFE%2Bmpl%2BitieeivOW3sumAvuacny5kZAIJDw8WBh4LTmF2aWdhdGVVcmwFEH4vYnNDb250ZW50LmFzcHgfAwUP5LiL6LyJIDI0MDEgQ1NWHgdWaXNpYmxlaGRkGAIFHl9fQ29udHJvbHNSZXF1aXJlUG9zdEJhY2tLZXlfXxYDBRJSYWRpb0J1dHRvbl9Ob3JtYWwFEFJhZGlvQnV0dG9uX0V4Y2QFEFJhZGlvQnV0dG9uX0V4Y2QFD0NhcHRjaGFDb250cm9sMQ8FJDA3M2ZmMGFkLWJmMDktNDEwNS1iZWFlLTc4NzZmYzQ4YWNlOGRMus2CvPmweww5YYlMyn1n&__EVENTVALIDATION=%2FwEdAAYOTEoblaqpT4jx3Y%2BJqru4fMmuxAJNAJcNkRRsVeJwwqKURZav%2F%2BYrVMqaWE2hvMxJwK4Ohf3nRgXHkFhQen1PRSciNdPYWmINCrip1wqw01PJCA0uL9aE2sjICZqv6GpQAqeC6xQp7AgU0B517B%2Fi&RadioButton_Normal=RadioButton_Normal&TextBox_Stkno=2401&CaptchaControl1=U6EQ8&btnOK=%E6%9F%A5%E8%A9%A2

= %3D
+ %2B
/ %2F

get file:

http://bsr.twse.com.tw/bshtm/bsContent.aspx

OCR
imagemagick handle text in image
https://github.com/g0v/pdf-text-cutter/blob/master/Note.org
http://www.imagemagick.org/script/command-line-options.php