Detecting Striaght Lines in a Image

[ravikiran]

Hi,
      We wanted to develop an application that does the Google search or any other such kind of operation on the text selected by an underline in Image. Here is a breif description about the scenerio, We have an Image which contains lot of Text and suppose i have opened that Image in paint and made an underline under some text, now i wanted get the Text which i underlined using some Image processing Techniques. How can i achieve this ?. (See the attachment for the reference )

Thanks & Regards,
Ravi Kiran.

[Phuong]

no offense but is this even related to photography? wouldn't it be better if you asked it at some programming forum/discussion board?