To read the numbers from the image using OpenCV 2.1

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Hello Everyone ..

Previously i posted this question in this forum and as per as experts suggestion they recommended me to use openCV for extracting data from the image.

Am new to openCV, basically i learnt To install Opencv 2.1 with visual studio 2008 & then i worked with simple programs like to load the images, Invert, save images. Then am trying to read the numbers from the image. I searched alot in google & openCV tutorials pdf, i dint got any solution. Please can anyone guide me about this ? OR A simple Walkthrough for reading the numbers from the image..

Thank you..

Posted 30-May-12 23:26pm

Guru_C++

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BupeChombaDerrick · Answer 1 · 2012-05-31T02:32:00

Solution 1

I googled "OCR in OpenCV" and got the following:

Check out this blog.

http://blog.damiles.com/2008/11/basic-ocr-in-opencv/[^]

hope it helps:)

Posted 31-May-12 2:32am

BupeChombaDerrick

Updated 31-May-12 2:38am

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Guru_C++ 31-May-12 9:07am

I tried this.. But am not getting exactly ..

BupeChombaDerrick 31-May-12 9:22am

What exactly are you not getting?

Guru_C++ 31-May-12 10:01am

I applied cvFindcountour() to image... I can Draw countours or like boundary line on numbers. But how do i retrieve the numbers to my application.. Is their any library for that ?

BupeChombaDerrick 31-May-12 10:23am

For starters use noiseless images so that the contours are connected per single digit and then you can group those pixels. For some details in grouping see http://stackoverflow.com/questions/2378579/opencv-grouping-white-pixels

But if you want your app to deal with images directly from a web cam then your app needs to do a lot of pre processing to identify possible locations of individual characters.

For now I recommend you start with a sliding window technique, first train a classifier and apply the classifier at all possible locations and scales using an image pyramid.

Guru_C++ 1-Jun-12 1:50am

Thanks... Let me try on this..

BupeChombaDerrick 1-Jun-12 18:48pm

You are welcome.