Optical character recognition

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See Scanning for the OCR of books to create OLPC content.

Optical character recognition (OCR) is the conversion of photographs of text, into editable text.

This page was created mostly in support of Test automation.

Running OCR on an XO

Install gocr.

yum install gocr

Next, get a pnm image of some page of text.

One approach is to take a screenshot.

yum install ImageMagick

Use Record to take a picture of some text, and show it full screen. Then in Terminal,

sleep 5; import -window root pageimage.png

and switch back to Record while the sleep is happening, and wait for the screenshot to be taken.

Convert the image to text.

gocr pageimage.pnm

Resources

• http://gentoo-wiki.com/HOWTO_do_OCR
• http://jocr.sourceforge.net/ GOCR
• http://lem.eui.upm.es/ocre.html Capable of user training. What range of languages might it be used with?
• http://www.gnu.org/software/ocrad/ocrad.html Unexamined.

This category gathers pages on camera hardware, software, and educational use.

See also

These pages have significant camera content, but are mostly about other things:

• Hardware specification
• Talk:Hardware specification
• Getting started programming#Camera

Also (with less content):

• Game development HOWTO#Camera
• Activity_Sharing#Voice.2FVideo
• Emulating_the_XO/Limitations_of_XO_disk_images